CVE-2025-38568 (GCVE-0-2025-38568)

Vulnerability from cvelistv5 – Published: 2025-08-19 17:02 – Updated: 2026-05-11 21:30
VLAI
Title
net/sched: mqprio: fix stack out-of-bounds write in tc entry parsing
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: mqprio: fix stack out-of-bounds write in tc entry parsing TCA_MQPRIO_TC_ENTRY_INDEX is validated using NLA_POLICY_MAX(NLA_U32, TC_QOPT_MAX_QUEUE), which allows the value TC_QOPT_MAX_QUEUE (16). This leads to a 4-byte out-of-bounds stack write in the fp[] array, which only has room for 16 elements (0–15). Fix this by changing the policy to allow only up to TC_QOPT_MAX_QUEUE - 1.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f62af20bed2d9e824f51cfc97ff01bc261f40e58 , < 39491e859fd494d0b51adc5c7d54c8a7dcf1d198 (git)
Affected: f62af20bed2d9e824f51cfc97ff01bc261f40e58 , < d00e4125680f7074c4f42ce3c297336f23128e70 (git)
Affected: f62af20bed2d9e824f51cfc97ff01bc261f40e58 , < 66fc2ebdd9d5dd6e5a9c7edeace5a61a0ab2cd86 (git)
Affected: f62af20bed2d9e824f51cfc97ff01bc261f40e58 , < f1a9dbcb7d17bf0abb325cdc984957cfabc59693 (git)
Affected: f62af20bed2d9e824f51cfc97ff01bc261f40e58 , < ffd2dc4c6c49ff4f1e5d34e454a6a55608104c17 (git)
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Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.6.102 , ≤ 6.6.* (semver)
Unaffected: 6.12.42 , ≤ 6.12.* (semver)
Unaffected: 6.15.10 , ≤ 6.15.* (semver)
Unaffected: 6.16.1 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "net/sched/sch_mqprio.c"
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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