CVE-2025-38568net/sched: mqprio: fix stack out-of-bounds write in tc entry parsing
- 7.8HighCVSS base score
- 0.19%Exploitation in 30 daysEPSS · top 92% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 4 months later
· 4 months later
Published
- 12 months later
· 12 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.19% · top 92% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected f62af20bed2d9e824f51cfc97ff01bc261f40e58 – < 39491e859fd494d0b51adc5c7d54c8a7dcf1d198
- affected f62af20bed2d9e824f51cfc97ff01bc261f40e58 – < d00e4125680f7074c4f42ce3c297336f23128e70
- affected f62af20bed2d9e824f51cfc97ff01bc261f40e58 – < 66fc2ebdd9d5dd6e5a9c7edeace5a61a0ab2cd86
- affected f62af20bed2d9e824f51cfc97ff01bc261f40e58 – < f1a9dbcb7d17bf0abb325cdc984957cfabc59693
- affected f62af20bed2d9e824f51cfc97ff01bc261f40e58 – < ffd2dc4c6c49ff4f1e5d34e454a6a55608104c17
- affected 6.4
- unaffected < 6.4
- unaffected 6.6.102 – ≤ 6.6.*
- unaffected 6.12.42 – ≤ 6.12.*
- unaffected 6.15.10 – ≤ 6.15.*
- unaffected 6.16.1 – ≤ 6.16.*
- unaffected 6.17 – ≤ *
References
References5
- https://git.kernel.org/stable/c/39491e859fd494d0b51adc5c7d54c8a7dcf1d198 (opens in a new tab)
- https://git.kernel.org/stable/c/d00e4125680f7074c4f42ce3c297336f23128e70 (opens in a new tab)
- https://git.kernel.org/stable/c/66fc2ebdd9d5dd6e5a9c7edeace5a61a0ab2cd86 (opens in a new tab)
- https://git.kernel.org/stable/c/f1a9dbcb7d17bf0abb325cdc984957cfabc59693 (opens in a new tab)
- https://git.kernel.org/stable/c/ffd2dc4c6c49ff4f1e5d34e454a6a55608104c17 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-27907 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-38568)Record last updated .