PT-2024-36888 · Linux+6 · Linux Kernel+6
Syzbot
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Published
2024-11-29
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Updated
2026-04-13
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CVE-2024-56581
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
A use-after-free vulnerability has been identified in the Linux kernel, specifically in the btrfs file system. The issue occurs when an unexpected action of BTRFS DROP DELAYED REF is encountered after successfully inserting a new reference entry into the block entry's rbtree. This leads to the reference entry being freed without being removed from the rbtree, resulting in a use-after-free error when the block entry is accessed later. The vulnerability is triggered by calling btrfs free ref cache(), which iterates over all block entries and calls free block entry() for each one. The Syzbot has reported this issue with several stack traces.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
Double Free
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Related Identifiers
Affected Products
Alt Linux
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Os
Ubuntu