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CVE-2024-26726

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: btrfs: don't drop extent_map for free space inode on write error While running the CI for an unrelated change I hit the followi…

Published Apr 3, 2024CWE-617EPSS 0.26%

Overview

CVE-2024-26726 is a medium-severity vulnerability. It was published on April 3, 2024 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: don't drop extent_map for free space inode on write error

While running the CI for an unrelated change I hit the following panic

with generic/648 on btrfs_holes_spacecache.

assertion failed: block_start != EXTENT_MAP_HOLE, in fs/btrfs/extent_io.c:1385

------------[ cut here ]------------

kernel BUG at fs/btrfs/extent_io.c:1385!

invalid opcode: 0000 [#1] PREEMPT SMP NOPTI

CPU: 1 PID: 2695096 Comm: fsstress Kdump: loaded Tainted: G W 6.8.0-rc2+ #1

RIP: 0010:__extent_writepage_io.constprop.0+0x4c1/0x5c0

Call Trace:

<TASK>

extent_write_cache_pages+0x2ac/0x8f0

extent_writepages+0x87/0x110

do_writepages+0xd5/0x1f0

filemap_fdatawrite_wbc+0x63/0x90

__filemap_fdatawrite_range+0x5c/0x80

btrfs_fdatawrite_range+0x1f/0x50

btrfs_write_out_cache+0x507/0x560

btrfs_write_dirty_block_groups+0x32a/0x420

commit_cowonly_roots+0x21b/0x290

btrfs_commit_transaction+0x813/0x1360

btrfs_sync_file+0x51a/0x640

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/02f2b95b00bf57d20320ee168b30fb7f3db8e555Refgit.kernel.org/stable/c/143842584c1237ebc248b2547c29d16bbe400a92Refgit.kernel.org/stable/c/5571e41ec6e56e35f34ae9f5b3a335ef510e0adeRefgit.kernel.org/stable/c/7bddf18f474f166c19f91b2baf67bf7c5eda03f7Refgit.kernel.org/stable/c/a4b7741c8302e28073bfc6dd1c2e73598e5e535eRefgit.kernel.org/stable/c/02f2b95b00bf57d20320ee168b30fb7f3db8e555Refgit.kernel.org/stable/c/5571e41ec6e56e35f34ae9f5b3a335ef510e0adeRefgit.kernel.org/stable/c/7bddf18f474f166c19f91b2baf67bf7c5eda03f7Refgit.kernel.org/stable/c/a4b7741c8302e28073bfc6dd1c2e73598e5e535e

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26726?

CVE-2024-26726 is a medium-severity vulnerability. It was published on April 3, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26726?

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-2024-26726?

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-2024-26726?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26726 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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