PT-2023-3973 · Linux+9 · Linux Kernel+9
Lion
·
Published
2023-07-13
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Updated
2024-08-22
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CVE-2023-3611
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to an out-of-bounds write vulnerability in the Linux kernel's net/sched: sch qfq component. This vulnerability 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.Recommendations
Upgrade past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64 to resolve the issue. As a temporary workaround, consider restricting access to the vulnerable
qfq change agg() function until a patch is available.Exploit
Fix
DoS
LPE
Memory Corruption
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Linux Kernel
Red Hat
Red Os
Suse
Ubuntu