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CVE-2023-31436qfq_change_class in net/sched/sch_qfq.c in the Linux kernel before 6.2.13 allows an out-of-bounds write because lmax can exceed…
- 7.8HighCVSS base score
- 0.60%Exploitation in 30 daysEPSS · top 51% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
qfq_change_class in net/sched/sch_qfq.c in the Linux kernel before 6.2.13 allows an out-of-bounds write because lmax can exceed QFQ_MIN_LMAX.
Timeline
Published
- 3 years later
· 3 years 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 |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 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)
- 0.60% · top 51% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
n/a
- affected n/a
References
References11
- https://github.com/torvalds/linux/commit/3037933448f60f9acb705997eae62013ecb81e0d (opens in a new tab)x_transferred
- https://www.spinics.net/lists/stable-commits/msg294885.html (opens in a new tab)x_transferred
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.13 (opens in a new tab)x_transferred
- DSA-5402 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20230605 [SECURITY] [DLA 3446-1] linux-5.10 security update (opens in a new tab)mailing-listx_transferred
- https://security.netapp.com/advisory/ntap-20230609-0001/ (opens in a new tab)x_transferred
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html (opens in a new tab)x_transferred
- http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.html (opens in a new tab)x_transferred
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html (opens in a new tab)x_transferred
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-806742.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-2023-35744 (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-2023-31436)Record last updated .