CVE-2025-38477net/sched: sch_qfq: Fix race condition on qfq_aggregate
- 7.8HighCVSS base score
- 0.15%Exploitation in 30 daysEPSS · top 96% 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: sch_qfq: Fix race condition on qfq_aggregate A race condition can occur when 'agg' is modified in qfq_change_agg (called during qfq_enqueue) while other threads access it concurrently. For example, qfq_dump_class may trigger a NULL dereference, and qfq_delete_class may cause a use-after-free. This patch addresses the issue by: 1. Moved qfq_destroy_class into the critical section. 2. Added sch_tree_lock protection to qfq_dump_class and qfq_dump_class_stats.
Timeline
ID reserved
By Linux
- 3 months later
· 3 months later
Published
- 15 months later
· 15 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 | Medium4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.15% · top 96% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 462dbc9101acd38e92eda93c0726857517a24bbd – < aa7a22c4d678bf649fd3a1d27debec583563414d
- affected 462dbc9101acd38e92eda93c0726857517a24bbd – < d841aa5518508ab195b6781ad0d73ee378d713dd
- affected 462dbc9101acd38e92eda93c0726857517a24bbd – < c6df794000147a3a02f79984aada4ce83f8d0a1e
- affected 462dbc9101acd38e92eda93c0726857517a24bbd – < 466e10194ab81caa2ee6a332d33ba16bcceeeba6
- affected 462dbc9101acd38e92eda93c0726857517a24bbd – < fbe48f06e64134dfeafa89ad23387f66ebca3527
- affected 462dbc9101acd38e92eda93c0726857517a24bbd – < a6d735100f602c830c16d69fb6d780eebd8c9ae1
- affected 462dbc9101acd38e92eda93c0726857517a24bbd – < c000a3a330d97f6c073ace5aa5faf94b9adb4b79
- affected 462dbc9101acd38e92eda93c0726857517a24bbd – < 5e28d5a3f774f118896aec17a3a20a9c5c9dfc64
- affected 3.8
- unaffected < 3.8
- unaffected 5.4.297 – ≤ 5.4.*
- unaffected 5.10.241 – ≤ 5.10.*
- unaffected 5.15.190 – ≤ 5.15.*
- unaffected 6.1.147 – ≤ 6.1.*
- unaffected 6.6.100 – ≤ 6.6.*
- unaffected 6.12.40 – ≤ 6.12.*
- unaffected 6.15.8 – ≤ 6.15.*
- unaffected 6.16 – ≤ *
References
References11
- https://git.kernel.org/stable/c/aa7a22c4d678bf649fd3a1d27debec583563414d (opens in a new tab)
- https://git.kernel.org/stable/c/d841aa5518508ab195b6781ad0d73ee378d713dd (opens in a new tab)
- https://git.kernel.org/stable/c/c6df794000147a3a02f79984aada4ce83f8d0a1e (opens in a new tab)
- https://git.kernel.org/stable/c/466e10194ab81caa2ee6a332d33ba16bcceeeba6 (opens in a new tab)
- https://git.kernel.org/stable/c/fbe48f06e64134dfeafa89ad23387f66ebca3527 (opens in a new tab)
- https://git.kernel.org/stable/c/a6d735100f602c830c16d69fb6d780eebd8c9ae1 (opens in a new tab)
- https://git.kernel.org/stable/c/c000a3a330d97f6c073ace5aa5faf94b9adb4b79 (opens in a new tab)
- https://git.kernel.org/stable/c/5e28d5a3f774f118896aec17a3a20a9c5c9dfc64 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html (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-2025-22885 (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-2025-38477)Record last updated .