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CVE-2026-23214

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: btrfs: reject new transactions if the fs is fully read-only [BUG] There is a bug report where a heavily fuzzed fs is mounted wi…

Published Feb 18, 2026EPSS 0.13%

Overview

CVE-2026-23214 is a medium-severity vulnerability. It was published on February 18, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

btrfs: reject new transactions if the fs is fully read-only

[BUG]

There is a bug report where a heavily fuzzed fs is mounted with all

rescue mount options, which leads to the following warnings during

unmount:

BTRFS: Transaction aborted (error -22)

Modules linked in:

CPU: 0 UID: 0 PID: 9758 Comm: repro.out Not tainted

6.19.0-rc5-00002-gb71e635feefc #7 PREEMPT(full)

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014

RIP: 0010:find_free_extent_update_loop fs/btrfs/extent-tree.c:4208 [inline]

RIP: 0010:find_free_extent+0x52f0/0x5d20 fs/btrfs/extent-tree.c:4611

Call Trace:

<TASK>

btrfs_reserve_extent+0x2cd/0x790 fs/btrfs/extent-tree.c:4705

btrfs_alloc_tree_block+0x1e1/0x10e0 fs/btrfs/extent-tree.c:5157

btrfs_force_cow_block+0x578/0x2410 fs/btrfs/ctree.c:517

btrfs_cow_block+0x3c4/0xa80 fs/btrfs/ctree.c:708

btrfs_search_slot+0xcad/0x2b50 fs/btrfs/ctree.c:2130

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1972f44c189c8aacde308fa9284e474c1a5cbd9fRefgit.kernel.org/stable/c/3228b2eceb6c3d7e237f8a5330113dbd164fb90dRefgit.kernel.org/stable/c/a928eecf030a9a5dc5f5ca98332699f379b91963

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23214?

CVE-2026-23214 is a medium-severity vulnerability. It was published on February 18, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-23214?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-23214?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-23214?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23214 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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