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Review reviewHigh

CVE-2024-26690

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: protect updates of 64-bit statistics counters As explained by a comment in <linux/u64_stats_sync.h>, write side of struct u64_stats_sync must ensure mutual exclusion, or one seqcount update could be lost on 32-bit platforms, thus blocking readers forever. Such lockups have been observed in real world after stmmac_xmit() on one CPU raced with stmmac_napi_poll_tx() on another CPU. To fix the issue without introducing a new lock, split the statics into three parts: 1. fields updated only under the tx queue lock, 2...

CVSS
7.5
EPSS
0.84%
54.2% percentile
CISA KEV
Not listed
Published
2024.04.04
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.84%
Technical severityCVSS 7.5

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: protect updates of 64-bit statistics counters As explained by a comment in <linux/u64_stats_sync.h>, write side of struct u64_stats_sync must ensure mutual exclusion, or one seqcount update could be lost on 32-bit platforms, thus blocking readers forever. Such lockups have been observed in real world after stmmac_xmit() on one CPU raced with stmmac_napi_poll_tx() on another CPU. To fix the issue without introducing a new lock, split the statics into three parts: 1. fields updated only under the tx queue lock, 2...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 133466c3bbe171f826294161db203f7670bb30c8 < 9680b2ab54ba8d72581100e8c45471306101836e, >= 133466c3bbe171f826294161db203f7670bb30c8 < e6af0f082a4b87b99ad033003be2a904a1791b3f, >= 133466c3bbe171f826294161db203f7670bb30c8 < 38cc3c6dcc09dc3a1800b5ec22aef643ca11eab8, >= ff12183568e0531f6db935378a92237766ad080a, >= 6.1.160 < 6.2, >= 6.6, >= 6.6 < 6.6.18, >= 6.7 < 6.7.6, 6.8
Fixed versions
6.6.18, 6.7.6

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Not available
CVE-2024-26690 — Linux Linux, linux kernel | SECUFOCUS NOW