VULNERABILITY INTELLIGENCE
CVE-2023-3611
CVSS score7.8 HIGH
EPSS probability0.29%
CISA KEVNot currently listed
Published2023-07-21
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Description
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.
Weakness classification
- CWE-787: Out-of-bounds Write
Primary references
- cve-coordination@google.com — Mailing List, Patch, Vendor Advisory
- cve-coordination@google.com — Patch, Vendor Advisory
- cve-coordination@google.com — Mailing List, Third Party Advisory
- cve-coordination@google.com — Mailing List
- cve-coordination@google.com — Third Party Advisory
- cve-coordination@google.com — Third Party Advisory
- cve-coordination@google.com — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Patch, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory