PT-2025-8783 · Linux+7 · Linux Kernel+7
Syzbot
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Published
2024-12-06
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Updated
2026-04-20
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CVE-2024-57996
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 5.10.0
Description
A vulnerability has been identified in the Linux kernel, specifically in the net sched module, where the sch sfq implementation does not work correctly with a limit of 1 packet. This issue can cause an array-index-out-of-bounds error in the sfq head array, leading to a crash. The vulnerability can be triggered by sending two packets in a specific scenario, causing the qdisc qlen to underflow and resulting in an out-of-bounds access.
Recommendations
For Linux kernel versions prior to 5.10.0, apply the patch that adds a check to prevent the limit from being set to 1, as this will prevent the array-index-out-of-bounds error and subsequent crash. As a temporary workaround, consider disabling the sfq qdisc until a patch is available.
Exploit
Fix
LPE
Improper Validation of Array Index
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu