CVE-2026-23018 — Deadlock in Linux
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 94.97%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJan 31
Description
In the Linux kernel, the following vulnerability has been resolved:
btrfs: release path before initializing extent tree in btrfs_read_locked_inode()
In btrfs_read_locked_inode() we are calling btrfs_init_file_extent_tree()
while holding a path with a read locked leaf from a subvolume tree, and
btrfs_init_file_extent_tree() may do a GFP_KERNEL allocation, which can
trigger reclaim.
This can create a circular lock dependency which lockdep warns about with
the following splat:
[6.1433] ========…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6
Affected Packages5 packages
▶CVEListV5linux/linux8679d2687c351824d08cf1f0e86f3b65f22a00fe — 92a5590851144f034adc51fee55e6878ccac716e+3
Patches
🔴Vulnerability Details
3OSV▶
CVE-2026-23018: In the Linux kernel, the following vulnerability has been resolved: btrfs: release path before initializing extent tree in btrfs_read_locked_inode() I↗2026-01-31
GHSA▶
GHSA-9frx-88jj-qgh5: In the Linux kernel, the following vulnerability has been resolved:
btrfs: release path before initializing extent tree in btrfs_read_locked_inode()↗2026-01-31