HighCVE-2026-31419

Linux Kernel: Race Condition (CVE-2026-31419)

Published 13.04.2026Last modified 30.10.2026Sources: Ubuntu, BSI, Debian, Debian LTS, Red Hat, CVE.org, Msrc Update Guide, EUVD

What is affected, what to do

The available sources name no fixed version. Check the vendor guidance in the references below.

Conflicting version data — version display is hidden until the data is resolved.

Not sure whether and how you are affected? Ask a question about this vulnerability

Metrics

7.8

Priority

XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

Source: NVD, CVSS v3

7.8

CVSS v3

Severity High on the scale from 0 to 10.

Source: Ubuntu, BSI, Debian, Debian LTS, Red Hat, CVE.org, Msrc Update Guide, EUVD

0.1 %

EPSS score

Low — model estimates < 1% exploitation likelihood.

Source: FIRST EPSS, percentile 2.6

Show all metrics

Severity: High
Priority (0–325) The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first? Read in glossary: 55.07 Methodology
Exploit maturity An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack. Read in glossary: no public PoC known
XIEM Effective CVSS XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command. Read in glossary: 7.8 Methodology
CVSS v3 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 7.8
EPSS score The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“. Read in glossary: 0.1 %; Low — model estimates < 1% exploitation likelihood.
EPSS percentile The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking. Read in glossary: 2.6; Low — this CVE sits in the lower 10% of all CVEs scored today.
KEV status The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: —
Published: 13.04.2026
CISA assessment (SSVC): Exploitation: none known · not automatable · Technical impact: total; Source: CISA Vulnrichment, as of 16 October 2026
CWE CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect. Read in glossary: CWE-362

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2 NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management. Read in glossary: High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
CRA The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates. Read in glossary: From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001 ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security. Read in glossary: Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

In the Linux kernel, the following vulnerability has been resolved: net: bonding: fix use-after-free in bond_xmit_broadcast() bond_xmit_broadcast() reuses the original skb for the last slave (determined by bond_is_last_slave()) and clones it for others. Concurrent slave enslave/release can mutate the slave list during RCU-protected iteration, changing which slave is "last" mid-loop. This causes the original skb to be double-consumed (double-freed). Replace the racy bond_is_last_slave() check with a simple index comparison (i + 1 == slaves_count) against the pre-snapshot slave count taken via READ_ONCE() before the loop. This preserves the zero-copy optimization for the last slave while making the "last" determination stable against concurrent list mutations. The UAF can trigger the following crash: ================================================================== BUG: KASAN: slab-use-after-free in skb_clone Read of size 8 at addr ffff888100ef8d40 by task exploit/147 CPU: 1 UID: 0 PID: 147 Comm: exploit Not tainted 7.0.0-rc3+ #4 PREEMPTLAZY Call Trace: <TASK> dump_stack_lvl (lib/dump_stack.c:123) print_report (mm/kasan/report.c:379 mm/kasan/report.c:482) kasan_report (mm/kasan/report.c:597) skb_clone (include/linux/skbuff.h:1724 include/linux/skbuff.h:1792 include/linux/skbuff.h:3396 net/core/skbuff.c:2108) bond_xmit_broadcast (drivers/net/bonding/bond_main.c:5334) bond_start_xmit (drivers/net/bonding/bond_main.c:5567 drivers/net/bonding/bond_main.c:5593) dev_hard_start_xmit (include/linux/netdevice.h:5325 include/linux/netdevice.h:5334 net/core/dev.c:3871 net/core/dev.c:3887) __dev_queue_xmit (include/linux/netdevice.h:3601 net/core/dev.c:4838) ip6_finish_output2 (include/net/neighbour.h:540 include/net/neighbour.h:554 net/ipv6/ip6_output.c:136) ip6_finish_output (net/ipv6/ip6_output.c:208 net/ipv6/ip6_output.c:219) ip6_output (net/ipv6/ip6_output.c:250) ip6_send_skb (net/ipv6/ip6_output.c:1985) udp_v6_send_skb (net/ipv6/udp.c:1442) udpv6_sendmsg (net/ipv6/udp.c:1733) __sys_sendto (net/socket.c:730 net/socket.c:742 net/socket.c:2206) __x64_sys_sendto (net/socket.c:2209) do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) </TASK> Allocated by task 147: Freed by task 147: The buggy address belongs to the object at ffff888100ef8c80 which belongs to the cache skbuff_head_cache of size 224 The buggy address is located 192 bytes inside of freed 224-byte region [ffff888100ef8c80, ffff888100ef8d60) Memory state around the buggy address: ffff888100ef8c00: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff888100ef8c80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888100ef8d00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff888100ef8d80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ffff888100ef8e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================

Source: Ubuntu Security Notices, BSI WID Portal, BSI CSAF, Debian Security Advisories, Debian LTS Advisories, redhat_csaf, cvelistv5, NVD (NIST), Microsoft Security Update Guide, ENISA EUVD, CVE.org (MITRE)

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

Affected products
		Affected versions	Fixed in
Linux	Linux	`5.10.94 – < 5.10.273` `6.19 – < 6.19.12` `6.13 – < 6.18.22` `6.7 – < 6.12.95` `5.16.3 – < 5.17` `6.20 – < 7.0` `5.17 – < 6.1.184` `6.2 – < 6.6.143` `5.15.17 – < 5.15.224`	`5.10.273` `6.19.12` `6.18.22` `6.12.95` `5.17` `7.0` `6.1.184` `6.6.143` `5.15.224`
IBM	DataPower Gateway	`< 11.0.0.3` `< 10.6.0.11` `< 10.5.0.23`	`11.0.0.3` `10.6.0.11` `10.5.0.23`
IBM	QRadar SIEM	`<7.5.0 UP15 IF06`	—
Microsoft	Azure Linux	`azl3`	—

Vendors and products

Affected operating systems

Affected operating systems

Linux	ubuntu	aws	`bionic`
Linux	ubuntu	aws	`jammy`
Linux	ubuntu	aws	`noble`
Linux	ubuntu	aws	`resolute`
Linux	ubuntu	aws	`xenial`
Linux	ubuntu	aws-6.8	`jammy`
Linux	ubuntu	aws-hwe	`xenial`
Linux	ubuntu	azure	`jammy`
Linux	ubuntu	azure	`noble`
Linux	ubuntu	azure	`resolute`
Linux	ubuntu	azure	`xenial`
Linux	ubuntu	azure-4.15	`bionic`
Linux	ubuntu	gcp	`jammy`
Linux	ubuntu	gcp	`noble`
Linux	ubuntu	gcp	`resolute`
Linux	ubuntu	gcp	`xenial`
Linux	ubuntu	gcp-4.15	`bionic`
Linux	ubuntu	gcp-6.8	`jammy`
Linux	ubuntu	generic-4.15	`bionic`
Linux	ubuntu	generic-4.15	`xenial`
Linux	ubuntu	generic-4.4	`xenial`
Linux	ubuntu	generic-5.4	`bionic`
Linux	ubuntu	generic-5.4	`focal`
Linux	ubuntu	gke	`jammy`

Weakness classes (CWE)

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Class
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
Entry at MITRE CWE-362

References & sources

git.kernel.orgstable/c/3453882f36c40d2339267093676585a89808a73deuvd
git.kernel.orgstable/c/d4cc7e4c80b1634c7b1497574a2fdb18df6c026ceuvd, Patch
git.kernel.orgstable/c/f5b94654a4a19891a8108d66ef166de6c028c6cdeuvd, Patch
git.kernel.orgstable/c/2884bf72fb8f03409e423397319205de48adca16euvd, Patch
git.kernel.orgstable/c/00752893f96b344f258c9c6de18b33171ac4872c
git.kernel.orgstable/c/2de5c8eea0a9db99dae7c36f4b541b74b41d3a04
git.kernel.orgstable/c/a0f661918edc79d7a75e468128af8d41e2a1a83a
access.redhat.comsecurity/cve/CVE-2026-31419Vulnerability database, x_refsource_REDHAT
bugzilla.redhat.comRHBZ#2457829Issue tracking, x_refsource_REDHAT
security.access.redhat.comdata/csaf/v2/vex/2026/cve-2026-31419.jsonx_sadp-csaf-vex
access.redhat.comerrata/RHSA-2026:22334Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:13566Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:25191Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:22940Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:21209Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:23224Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:25217Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:35870Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:27353Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:36530Vendor advisory, x_refsource_REDHAT

Changes to this CVE

Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

30.10.2026Record modifiedLinux

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/31xxx/CVE-2026-31419.json">CVE-2026-31419</a>
Reference	added	—	https://git.kernel.org/stable/c/060d83bb6147c36fc21134d5b332d266b8c176bc
Reference	added	—	https://git.kernel.org/stable/c/df690112b2172e8eb0f4dd8ec1019b65ee979203

Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

19.10.2026Record modifiedCISA ADP
Weakness type: CWE-362
Show the original change
Individual changes of this event as published by NVD
Type Action Before After
Weakness type (CWE) added
—
CWE-362
Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Individual changes of this event as published by NVD
Type	Action	Before	After
Weakness type (CWE)	added	—	CWE-362

16.10.2026Record modifiedLinux

New references:

and 2 more references

Show 15 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://git.kernel.org/stable/c/00752893f96b344f258c9c6de18b33171ac4872c
Reference	added	—	https://git.kernel.org/stable/c/2884bf72fb8f03409e423397319205de48adca16
Reference	added	—	https://git.kernel.org/stable/c/2de5c8eea0a9db99dae7c36f4b541b74b41d3a04
Reference	added	—	https://git.kernel.org/stable/c/a0f661918edc79d7a75e468128af8d41e2a1a83a
Reference	added	—	https://git.kernel.org/stable/c/d4cc7e4c80b1634c7b1497574a2fdb18df6c026c
Reference	added	—	https://git.kernel.org/stable/c/f5b94654a4a19891a8108d66ef166de6c028c6cd
Reference	removed	https://git.kernel.org/stable/c/00752893f96b344f258c9c6de18b33171ac4872c	—
Reference	removed	https://git.kernel.org/stable/c/2884bf72fb8f03409e423397319205de48adca16	—
Reference	removed	https://git.kernel.org/stable/c/2de5c8eea0a9db99dae7c36f4b541b74b41d3a04	—
Reference	removed	https://git.kernel.org/stable/c/a0f661918edc79d7a75e468128af8d41e2a1a83a	—
Reference	removed	https://git.kernel.org/stable/c/d4cc7e4c80b1634c7b1497574a2fdb18df6c026c	—
Reference	removed	https://git.kernel.org/stable/c/f5b94654a4a19891a8108d66ef166de6c028c6cd	—
Reference type	removed	https://git.kernel.org/stable/c/2884bf72fb8f03409e423397319205de48adca16 Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/d4cc7e4c80b1634c7b1497574a2fdb18df6c026c Types: Patch	—
Reference type	removed	https://git.kernel.org/stable/c/f5b94654a4a19891a8108d66ef166de6c028c6cd Types: Patch	—

Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

16.10.2026Record modifiedCISA ADP

CISA assessment (SSVC): exploitation: none known, automatable: no

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
SSVC assessment	added	—	{"id":"CVE-2026-31419","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:09:08.906422Z"}

Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

16.10.2026Record modifiedRed Hat ADP

New references:

and 8 more references

Show 42 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:13566
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:19521
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:21209
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:22334
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:22900
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:22940
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:23224
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:25191
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:25217
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:27353
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:27354
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:35870
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36172
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36530
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36531
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36532
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36533
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:36534
Reference	added	—	https://access.redhat.com/security/cve/CVE-2026-31419
Reference	added	—	https://bugzilla.redhat.com/show_bug.cgi?id=2457829
Reference	added	—	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31419.json
Reference	removed	https://access.redhat.com/errata/RHSA-2026:13566	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:19521	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:21209	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:22334	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:22900	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:22940	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:23224	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:25191	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:25217	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:27353	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:27354	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:35870	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:36172	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:36530	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:36531	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:36532	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:36533	—
Reference	removed	https://access.redhat.com/errata/RHSA-2026:36534	—
Reference	removed	https://access.redhat.com/security/cve/CVE-2026-31419	—
Reference	removed	https://bugzilla.redhat.com/show_bug.cgi?id=2457829	—
Reference	removed	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31419.json	—

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Show 4 older changes

23.08.2026Record modifiedLinux

New references:

https://git.kernel.org/stable/c/00752893f96b344f258c9c6de18b33171ac4872c

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://git.kernel.org/stable/c/00752893f96b344f258c9c6de18b33171ac4872c
Affected versions (publisher)	changed	Linux, Linux	Linux, Linux

Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

06.07.2026Record modifiedRed Hat ADP
New references:
- https://access.redhat.com/errata/RHSA-2026:35870
Show the original change
Individual changes of this event as published by NVD
Type Action Before After
Reference added
—
https://access.redhat.com/errata/RHSA-2026:35870
Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:35870

04.07.2026Record modifiedLinux

New references:

https://git.kernel.org/stable/c/a0f661918edc79d7a75e468128af8d41e2a1a83a

Show 4 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://git.kernel.org/stable/c/a0f661918edc79d7a75e468128af8d41e2a1a83a
Reference	removed	https://git.kernel.org/stable/c/3453882f36c40d2339267093676585a89808a73d	—
Reference type	removed	https://git.kernel.org/stable/c/3453882f36c40d2339267093676585a89808a73d Types: Patch	—
Affected versions (publisher)	changed	Linux, Linux	Linux, Linux

Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

19.06.2026Record modifiedLinux

New references:

https://git.kernel.org/stable/c/2de5c8eea0a9db99dae7c36f4b541b74b41d3a04

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://git.kernel.org/stable/c/2de5c8eea0a9db99dae7c36f4b541b74b41d3a04
Affected versions (publisher)	changed	Linux, Linux	Linux, Linux

Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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