CVE-2023-3611

Advisory lineage Upstream: 0 Downstream: 58
Modified
Published: 21 Jul 2023, 20:49
Last modified:13 Feb 2025, 16:56

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

21 Jul 2023, 20:49
Published
Vulnerability first disclosed
13 Feb 2025, 16:56
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 3%

Techniques & Countermeasures

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • debian•debian_linux

    10.0 | 11.0 | 12.0

  • Unknown•Kernel

    ≥ 3.8, < 6.5

  • linux•linux_kernel

    ≥ 3.8, < 4.14.322 | ≥ 4.15, < 4.19.291 | ≥ 4.20, < 5.4.253 | ≥ 5.5, < 5.10.188 | ≥ 5.11, < 5.15.121 | ≥ 5.16, < 6.1.40 | ≥ 6.2, < 6.4.5 | 6.5:rc1

References (7)