CVE-2022-49761

HIGH

Linux Kernel < 5.10.165, 5.11.0-5.15.89, 5.16.0-6.1.7 - Use-After-Free in run_one_delayed_ref()

Title source: llm
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: always report error in run_one_delayed_ref() Currently we have a btrfs_debug() for run_one_delayed_ref() failure, but if end users hit such problem, there will be no chance that btrfs_debug() is enabled. This can lead to very little useful info for debugging. This patch will: - Add extra info for error reporting Including: * logical bytenr * num_bytes * type * action * ref_mod - Replace the btrfs_debug() with btrfs_err() - Move the error reporting into run_one_delayed_ref() This is to avoid use-after-free, the @node can be freed in the caller. This error should only be triggered at most once. As if run_one_delayed_ref() failed, we trigger the error message, then causing the call chain to error out: btrfs_run_delayed_refs() `- btrfs_run_delayed_refs() `- btrfs_run_delayed_refs_for_head() `- run_one_delayed_ref() And we will abort the current transaction in btrfs_run_delayed_refs(). If we have to run delayed refs for the abort transaction, run_one_delayed_ref() will just cleanup the refs and do nothing, thus no new error messages would be output.

Scores

CVSS v3 7.8
EPSS 0.0018
EPSS Percentile 8.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-416
Status published
Products (15)
linux/Kernel 3.4.0 - 5.10.165linux
linux/Kernel 5.11.0 - 5.15.90linux
linux/Kernel 5.16.0 - 6.1.8linux
Linux/Linux < 3.4
Linux/Linux 3.4
Linux/Linux 5.10.165 - 5.10.*
Linux/Linux 5.15.90 - 5.15.*
Linux/Linux 6.1.8 - 6.1.*
Linux/Linux 6.2
Linux/Linux 79787eaab46121d4713ed03c8fc63b9ec3eaec76 - 18bd1c9c02e64a3567f90c83c2c8b855531c8098
... and 5 more
Published Mar 27, 2025
Tracked Since Feb 18, 2026