Medium 5.5Published Apr 3, 2026

CVE-2026-23423btrfs: free pages on error in btrfs_uring_read_extent()

Updated under an hour ago (Oct 28, 2026, 10:00 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: btrfs: free pages on error in btrfs_uring_read_extent() In this function the 'pages' object is never freed in the hopes that it is picked up by btrfs_uring_read_finished() whenever that executes in the future. But that's just the happy path. Along the way previous allocations might have gone wrong, or we might not get -EIOCBQUEUED from btrfs_encoded_read_regular_fill_pages(). In all these cases, we go to a cleanup section that frees all memory allocated by this function without assuming any deferred execution, and this also needs to happen for the 'pages' allocation.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 34310c442e175f286b4c06ab5caa4e0b267ea31c before d4f210de01eaccac61eee657f676045ef9771d07; from 34310c442e175f286b4c06ab5caa4e0b267ea31c before 628895890b0c9ac9129129e89455da7db95ba343; 34310c442e175f286b4c06ab5caa4e0b267ea31c builds before 3f501412f2079ca14bf68a18d80a2b7a823f1f64	CNA record
linux linux_kernel linux:linux_kernel	from 6.13.1 before 6.18.17; from 6.19 before 6.19.7; 6.13; 7.0; 7.0; 7.0; 7.0; 7.0; and 2 more ranges	NVD

References

References

https://git.kernel.org/stable/c/d4f210de01eaccac61eee657f676045ef9771d07	patch
https://git.kernel.org/stable/c/628895890b0c9ac9129129e89455da7db95ba343	patch
https://git.kernel.org/stable/c/3f501412f2079ca14bf68a18d80a2b7a823f1f64	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.