CVE-2023-3611

high

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.

References

https://www.debian.org/security/2023/dsa-5492

https://www.debian.org/security/2023/dsa-5480

https://security.netapp.com/advisory/ntap-20230908-0002/

https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html

https://www.cisa.gov/news-events/ics-advisories/icsa-25-044-09

https://cloud.google.com/support/bulletins#gcp-2024-017

https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html

https://kernel.dance/3e337087c3b5805fe0b8a46ba622a962880b5d64

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e337087c3b5805fe0b8a46ba622a962880b5d64

https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-44260

https://cert-portal.siemens.com/productcert/html/ssa-831302.html

https://cert-portal.siemens.com/productcert/html/ssa-806742.html

https://cert-portal.siemens.com/productcert/html/ssa-794697.html

https://cert-portal.siemens.com/productcert/html/ssa-769027.html

https://cert-portal.siemens.com/productcert/html/ssa-398330.html

Details

Source: Mitre, NVD

Published: 2023-07-21

Updated: 2026-10-14

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00293