Linux Kernel: security vulnerability (CVE-2024-56719)
Published Last modified Sources: Siemens ProductCERT, Debian, Debian LTS, BSI, SUSE, Ubuntu, CVE.org, Msrc Update Guide, EUVD
What is affected, what to do
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix TSO DMA API usage causing oops Commit 66600fac7a98 ("net: stmmac: TSO: Fix unbalanced DMA map/unmap for non-paged SKB data") moved the assignment of tx_skbuff_dma[]'s members to be later in stmmac_tso_xmit(). The buf (dma cookie) and len stored in this structure are passed to dma_unmap_single() by stmmac_tx_clean().
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.
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Metrics
10.0
Priority
XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.
Source: Vendor (CNA), CVSS v3
10.0
CVSS v3
Severity Critical on the scale from 0 to 10.
Source: Siemens ProductCERT, Debian, Debian LTS, BSI, SUSE, Ubuntu, CVE.org, Msrc Update Guide, EUVD
0.5 %
EPSS score
Low — model estimates < 1% exploitation likelihood.
Source: FIRST EPSS, percentile 45.6
Show all metrics
- Severity
- Critical
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- 73.91 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- 10.0 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- 10.0
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- 0.5 %
- 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- 45.6
- High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
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 1 October 2025
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: stmmac: fix TSO DMA API usage causing oops Commit 66600fac7a98 ("net: stmmac: TSO: Fix unbalanced DMA map/unmap for non-paged SKB data") moved the assignment of tx_skbuff_dma[]'s members to be later in stmmac_tso_xmit(). The buf (dma cookie) and len stored in this structure are passed to dma_unmap_single() by stmmac_tx_clean(). The DMA API requires that the dma cookie passed to dma_unmap_single() is the same as the value returned from dma_map_single(). However, by moving the assignment later, this is not the case when priv->dma_cap.addr64 > 32 as "des" is offset by proto_hdr_len. This causes problems such as: dwc-eth-dwmac 2490000.ethernet eth0: Tx DMA map failed and with DMA_API_DEBUG enabled: DMA-API: dwc-eth-dwmac 2490000.ethernet: device driver tries to +free DMA memory it has not allocated [device address=0x000000ffffcf65c0] [size=66 bytes] Fix this by maintaining "des" as the original DMA cookie, and use tso_des to pass the offset DMA cookie to stmmac_tso_allocator(). Full details of the crashes can be found at: https://lore.kernel.org/all/d8112193-0386-4e14-b516-37c2d838171a@nvidia.com/ https://lore.kernel.org/all/klkzp5yn5kq5efgtrow6wbvnc46bcqfxs65nz3qy77ujr5turc@bwwhelz2l4dw/
Source: siemens_advisory, Debian Security Advisories, Debian LTS Advisories, BSI CSAF, BSI WID Portal, suse_csaf, Ubuntu Security Notices, NVD (NIST), Microsoft Security Update Guide, CVE.org (MITRE), cvelistv5, ENISA EUVD
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 |
|
|
| Dell | Secure Connect Gateway |
|
|
| Siemens | SIMATIC S7 |
|
|
Vendors and products
Affected operating systems
| Linux | debian | linux | bookworm |
| Linux | debian | linux-6.1 | bullseye |
| Linux | linux | linux_kernel | 6.13 |
| Linux | linux | linux_kernel | — |
References & sources
- git.kernel.orgstable/c/05968b6dd0ffc65d7386608b11a11fb4fdfc9f36
- git.kernel.orgstable/c/6abcdc9a73274052a9e96a1926994ecf9aedad82
- git.kernel.orgstable/c/db3667c9bbfbbf5de98e6c9542f7e03fb5243286
- git.kernel.orgstable/c/9d5dd7ccea1b46a9a7c6b3c2b9e5ed8864e185e2
- git.kernel.orgstable/c/4c49f38e20a57f8abaebdf95b369295b153d1f8e
- Siemens ProductCERTproductcert/html/ssa-082556.html
- Siemens ProductCERTproductcert/html/ssa-019113.html
- Siemens ProductCERTproductcert/html/ssa-457936.html
- Siemens ProductCERTproductcert/html/ssa-784472.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/05968b6dd0ffc65d7386608b11a11fb4fdfc9f36
- https://git.kernel.org/stable/c/4c49f38e20a57f8abaebdf95b369295b153d1f8e
- https://git.kernel.org/stable/c/6abcdc9a73274052a9e96a1926994ecf9aedad82
- https://git.kernel.org/stable/c/9d5dd7ccea1b46a9a7c6b3c2b9e5ed8864e185e2
and 1 more reference
Show 13 original changes
Individual changes of this event as published by NVD Type Action Before After Reference added —https://git.kernel.org/stable/c/05968b6dd0ffc65d7386608b11a11fb4fdfc9f36Reference added —https://git.kernel.org/stable/c/4c49f38e20a57f8abaebdf95b369295b153d1f8eReference added —https://git.kernel.org/stable/c/6abcdc9a73274052a9e96a1926994ecf9aedad82Reference added —https://git.kernel.org/stable/c/9d5dd7ccea1b46a9a7c6b3c2b9e5ed8864e185e2Reference added —https://git.kernel.org/stable/c/db3667c9bbfbbf5de98e6c9542f7e03fb5243286Reference removed https://git.kernel.org/stable/c/05968b6dd0ffc65d7386608b11a11fb4fdfc9f36—Reference removed https://git.kernel.org/stable/c/4c49f38e20a57f8abaebdf95b369295b153d1f8e—Reference removed https://git.kernel.org/stable/c/6abcdc9a73274052a9e96a1926994ecf9aedad82—Reference removed https://git.kernel.org/stable/c/9d5dd7ccea1b46a9a7c6b3c2b9e5ed8864e185e2—Reference removed https://git.kernel.org/stable/c/db3667c9bbfbbf5de98e6c9542f7e03fb5243286—Reference type removed https://git.kernel.org/stable/c/4c49f38e20a57f8abaebdf95b369295b153d1f8e Types: Patch—Reference type removed https://git.kernel.org/stable/c/9d5dd7ccea1b46a9a7c6b3c2b9e5ed8864e185e2 Types: Patch—Reference type removed https://git.kernel.org/stable/c/db3667c9bbfbbf5de98e6c9542f7e03fb5243286 Types: Patch—Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Record modifiedSiemens ADP
Show 7 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/2024/56xxx/CVE-2024-56719.json">CVE-2024-56719</a>Reference added —https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlReference added —https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlReference added —https://cert-portal.siemens.com/productcert/html/ssa-457936.htmlReference added —https://cert-portal.siemens.com/productcert/html/ssa-784472.htmlReference removed https://cert-portal.siemens.com/productcert/html/ssa-019113.html—Reference removed https://cert-portal.siemens.com/productcert/html/ssa-082556.html—Source identifier: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Record modifiedLinux
CVSS V3.1: AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Show the original change
Individual changes of this event as published by NVD Type Action Before After CVSS added —AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HSource identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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<a href="https://intel.neosec.eu/en/cve/CVE-2024-56719"><img src="https://intel.neosec.eu/badge/cve/CVE-2024-56719.svg?lang=en" alt="CVE-2024-56719 – NEOSEC Intel" height="20"></a>