Linux Kernel: NULL Pointer Dereference (CVE-2024-26878)
Published Last modified Sources: Siemens ProductCERT, SUSE, Debian, Red Hat, BSI, EUVD, CVE.org
What is affected, what to do
In the Linux kernel, the following vulnerability has been resolved: quota: Fix potential NULL pointer dereference Below race may cause NULL pointer dereference P1 P2 dquot_free_inode quota_off drop_dquot_ref remove_dquot_ref dquots = i_dquot(inode) dquots = i_dquot(inode) srcu_read_lock dquots[cnt]) != NULL (1) dquots[type] = NULL (2) spin_lock(&dquots[cnt]->dq_dqb_lock) (3) .... If dquot_free_inode(or other routines) checks inode's quota pointers (1) before quota_off sets it to NULL(2) and use it (3) after that, NULL pointer dereference will be triggered.
Update Linux Kernel to version 4.19.311, Linux Kernel to version 5.4.273, Linux Kernel to version 5.10.214.
- Affected
- Linux Kernel
lt 4.14..4.19.311 - Linux Kernel
lt 4.20..5.4.273 - Linux Kernel
lt 5.5..5.10.214 - Linux Kernel
lt 5.11..5.15.153 - Linux Kernel
lt 5.16..6.1.83 - Linux Kernel
lt 6.2..6.6.23 - Linux Kernel
lt 6.7..6.7.11 - Linux Kernel
lt 6.8..6.8.2
- Linux Kernel
- Fixed in
- Linux Kernel
4.19.311 - Linux Kernel
5.4.273 - Linux Kernel
5.10.214 - Linux Kernel
5.15.153 - Linux Kernel
6.1.83 - Linux Kernel
6.6.23 - Linux Kernel
6.7.11 - Linux Kernel
6.8.2 - Linux Kernel
6.9
- Linux Kernel
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Metrics
4.7
XIEM Effective CVSS
Highest available CVSS rating from NVD and vendor data.
Source: NVD, CVSS v3
0.0
CVSS v3
Severity Not rated on the scale from 0 to 10.
Source: Siemens ProductCERT, SUSE, Debian, Red Hat, BSI, EUVD, CVE.org
0.2 %
EPSS score
Low — model estimates < 1% exploitation likelihood.
Source: FIRST EPSS, percentile 8.6
Show all metrics
- Severity
- Medium
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- 5.45 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- 4.7 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- 0.0
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- 0.2 %
- 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- 8.6
- 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
- CISA assessment (SSVC)
- Exploitation: none known · not automatable · Technical impact: partial
- Source: CISA Vulnrichment, as of 10 September 2024
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- Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
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: quota: Fix potential NULL pointer dereference Below race may cause NULL pointer dereference P1 P2 dquot_free_inode quota_off drop_dquot_ref remove_dquot_ref dquots = i_dquot(inode) dquots = i_dquot(inode) srcu_read_lock dquots[cnt]) != NULL (1) dquots[type] = NULL (2) spin_lock(&dquots[cnt]->dq_dqb_lock) (3) .... If dquot_free_inode(or other routines) checks inode's quota pointers (1) before quota_off sets it to NULL(2) and use it (3) after that, NULL pointer dereference will be triggered. So let's fix it by using a temporary pointer to avoid this issue.
Source: siemens_advisory, suse_csaf, Debian Security Advisories, redhat_csaf, BSI CSAF, BSI WID Portal, ENISA EUVD, NVD (NIST), cvelistv5
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
|---|---|---|---|
| Linux | Linux |
|
|
Vendors and products
Affected operating systems
| Linux | debian | debian_linux | 10.0 |
| Linux | debian | linux | bullseye |
| Linux | linux | linux_kernel | — |
References & sources
- git.kernel.orgstable/c/8514899c1a4edf802f03c408db901063aa3f05a1euvd
- git.kernel.orgstable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0euvd
- git.kernel.orgstable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0euvd
- git.kernel.orgstable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25euvd
- git.kernel.orgstable/c/7f9e833fc0f9b47be503af012eb5903086939754euvd
- git.kernel.orgstable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5euvd
- git.kernel.orgstable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7euvd
- git.kernel.orgstable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877euvd
- git.kernel.orgstable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1feuvd
- lists.debian.orgdebian-lts-announce/2024/06/msg00017.htmlx_transferred
- lists.debian.orgdebian-lts-announce/2024/06/msg00020.htmlx_transferred
- Siemens ProductCERTproductcert/html/ssa-398330.html
- Siemens ProductCERTproductcert/html/ssa-265688.html
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).
Record modifiedLinux
New references:- https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25
- https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5
- https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0
- https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0
and 5 more references
Show 27 original changes
Individual changes of this event as published by NVD Type Action Before After Reference added —https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25Reference added —https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5Reference added —https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0Reference added —https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0Reference added —https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877Reference added —https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754Reference added —https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1Reference added —https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1fReference added —https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7Reference removed https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25—Reference removed https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5—Reference removed https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0—Reference removed https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0—Reference removed https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877—Reference removed https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754—Reference removed https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1—Reference removed https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f—Reference removed https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7—Reference type removed https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25 Types: Patch—Reference type removed https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5 Types: Patch—Reference type removed https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0 Types: Patch—Reference type removed https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0 Types: Patch—Reference type removed https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877 Types: Patch—Reference type removed https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754 Types: Patch—Reference type removed https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1 Types: Patch—Reference type removed https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f Types: Patch—Reference type removed https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7 Types: Patch—Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Record modifiedCVE Program
New references:- https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25
- https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5
- https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0
- https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0
and 7 more references
Show 33 original changes
Individual changes of this event as published by NVD Type Action Before After Reference added —https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25Reference added —https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5Reference added —https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0Reference added —https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0Reference added —https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877Reference added —https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754Reference added —https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1Reference added —https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1fReference added —https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7Reference added —https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlReference added —https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlReference removed https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25—Reference removed https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5—Reference removed https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0—Reference removed https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0—Reference removed https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877—Reference removed https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754—Reference removed https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1—Reference removed https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f—Reference removed https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7—Reference removed https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html—Reference removed https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html—Reference type removed https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25 Types: Patch—Reference type removed https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5 Types: Patch—Reference type removed https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0 Types: Patch—Reference type removed https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0 Types: Patch—Reference type removed https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877 Types: Patch—Reference type removed https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754 Types: Patch—Reference type removed https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1 Types: Patch—Reference type removed https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f Types: Patch—Reference type removed https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7 Types: Patch—Reference type removed https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html Types: Mailing List—Reference type removed https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html Types: Mailing List—Source identifier: af854a3a-2127-422b-91ae-364da2661108
Record modifiedSiemens ADP
Show 5 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/2024/26xxx/CVE-2024-26878.json">CVE-2024-26878</a>Reference added —https://cert-portal.siemens.com/productcert/html/ssa-265688.htmlReference added —https://cert-portal.siemens.com/productcert/html/ssa-398330.htmlReference removed https://cert-portal.siemens.com/productcert/html/ssa-265688.html—Reference removed https://cert-portal.siemens.com/productcert/html/ssa-398330.html—Source identifier: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
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<a href="https://intel.neosec.eu/en/cve/CVE-2024-26878"><img src="https://intel.neosec.eu/badge/cve/CVE-2024-26878.svg?lang=en" alt="CVE-2024-26878 – NEOSEC Intel" height="20"></a>