Buffer overflow in Linux Kernel
CVE-2023-3611
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.
Vulnerability class: Buffer Overflow
EPSS: 0.003 (19.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux Kernel — versions 3.8
- Linux Linux_kernel — versions 6.5
- Debian Debian_linux — versions 10.0, 11.0, 12.0
Weakness classification (CWE)
References
- cve-coordination@google.com (Patch, Mailing List, patch, Vendor Advisory)
- cve-coordination@google.com (Patch, Vendor Advisory)
- cve-coordination@google.com (Third Party Advisory)
- cve-coordination@google.com (Third Party Advisory)
- cve-coordination@google.com (Third Party Advisory)
- cve-coordination@google.com (Mailing List, Third Party Advisory)
- cve-coordination@google.com (Mailing List)
Frequently asked questions
- What is CVE-2023-3611?
- CVE-2023-3611 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2023-07-21.
- How severe is CVE-2023-3611?
- High severity. CVSS v3 base score is 7.8 out of 10.