CVE-2024-26727

5.5 · MEDIUM

Published Apr 3, 2024 linux CWE-617 EPSS 0.23% (13th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-26727 is a medium-severity vulnerability affecting linux linux_kernel. 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: do not ASSERT() if the newly created subvolume already got read

[BUG]

There is a syzbot crash, triggered by the ASSERT() during subvolume

creation:

assertion failed: !anon_dev, in fs/btrfs/disk-io.c:1319

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

kernel BUG at fs/btrfs/disk-io.c:1319!

invalid opcode: 0000 [#1] PREEMPT SMP KASAN

RIP: 0010:btrfs_get_root_ref.part.0+0x9aa/0xa60

<TASK>

btrfs_get_new_fs_root+0xd3/0xf0

create_subvol+0xd02/0x1650

btrfs_mksubvol+0xe95/0x12b0

__btrfs_ioctl_snap_create+0x2f9/0x4f0

btrfs_ioctl_snap_create+0x16b/0x200

btrfs_ioctl+0x35f0/0x5cf0

__x64_sys_ioctl+0x19d/0x210

do_syscall_64+0x3f/0xe0

entry_SYSCALL_64_after_hwframe+0x63/0x6b

---[ end trace 0000000000000000 ]---

[CAUSE]

During create_subvol(), after inserting root item for the newly created

subvolume, we would trigger btrfs_get_new_fs_root() to get the

btrfs_root of that subvolume.

The idea here is, we have

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected Products

Vendor	Product	Versions	Status
linux	linux_kernel	>= 5.9, < 5.10.210	Affected

References

Frequently Asked Questions

What is CVE-2024-26727?

CVE-2024-26727 is a medium-severity vulnerability affecting linux linux_kernel. It was published on April 3, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26727?

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-2024-26727?

How can CyberStrike help with CVE-2024-26727?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-26727 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

Autonomous Discovery

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Code Review

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HackBrowser

Browser-based exploitation validates findings with real proof-of-concept.

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