CVE-2026-43358 Details
Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: add missing RCU unlock in error path in try_release_subpage_extent_buffer() Call rcu_read_lock() before exiting the loop in try_release_subpage_extent_buffer() because there is a rcu_read_unlock() call past the loop. This has been detected by the Clang thread-safety analyzer.
A vulnerability has been identified in the Linux kernel's Btrfs file system management, specifically within the function responsible for handling subpage extent buffers. The issue arises from a missing Read-Copy Update (RCU) unlock in the error handling path of the 'try_release_subpage_extent_buffer()' function. This oversight can lead to improper synchronization, potentially causing a deadlock situation. The vulnerability was detected by the Clang thread-safety analyzer.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been addressed. The specific commit that resolves this issue is available in the Linux kernel stable tree.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/35b0c8768e848e1b7e32052db36b5fa59b6a33a1 | kernel.org | Patch |
| https://git.kernel.org/stable/c/5e1ab71f74a1e61f1254dff128a764fdebaec0b8 | kernel.org | Patch |
| https://git.kernel.org/stable/c/b2840e33127ce0eea880504b7f133e780f567a9b | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.16.4, < 6.17 >= 6.17.1, < 6.18.19 >= 6.19, < 6.19.9 6.17 - 6.17 rc2 6.17 rc3 6.17 rc4 6.17 rc5 6.17 rc6 6.17 rc7 7.0 rc1 7.0 rc2 7.0 rc3 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 15, 2026 | Initial Analysis | [email protected] |
| May 8, 2026 | New CVE Received | kernel.org |