CVE-2023-3611
Out-of-bounds write in Linux kernel's net/sched: sch_qfq component
HIGH 7.8EPSS 0.3%
An out-of-bounds write vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation. The qfq_change_agg() function in net/sched/sch_qfq.c allows an out-of-bounds write because lmax is updated according to packet sizes without bounds checks. We recommend upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64.
- Affected
- Linux · Kernel
- CVSS v3.1 NVD
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.29% chance of exploitation in the next 30 days, 21st percentile
- Published
- 2023-07-21
- Updated
- 2026-10-14
Exploit collections (1)
- linux/kernelctf/CVE-2023-3611_lts_mitigationgoogle/security-research
Security advisories
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e337087c3b…
- https://kernel.dance/3e337087c3b5805fe0b8a46ba622a962880b5d64
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- https://security.netapp.com/advisory/ntap-20230908-0002
- https://www.debian.org/security/2023/dsa-5480
- https://www.debian.org/security/2023/dsa-5492