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CVE-2024-26625

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: llc: call sock_orphan() at release time syzbot reported an interesting trace [1] caused by a stale sk->sk_wq pointer in a close…

Published Mar 6, 2024CWE-416EPSS 0.25%

Overview

CVE-2024-26625 is a high-severity vulnerability. It was published on March 6, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

llc: call sock_orphan() at release time

syzbot reported an interesting trace [1] caused by a stale sk->sk_wq

pointer in a closed llc socket.

In commit ff7b11aa481f ("net: socket: set sock->sk to NULL after

calling proto_ops::release()") Eric Biggers hinted that some protocols

are missing a sock_orphan(), we need to perform a full audit.

In net-next, I plan to clear sock->sk from sock_orphan() and

amend Eric patch to add a warning.

[1]

BUG: KASAN: slab-use-after-free in list_empty include/linux/list.h:373 [inline]

BUG: KASAN: slab-use-after-free in waitqueue_active include/linux/wait.h:127 [inline]

BUG: KASAN: slab-use-after-free in sock_def_write_space_wfree net/core/sock.c:3384 [inline]

BUG: KASAN: slab-use-after-free in sock_wfree+0x9a8/0x9d0 net/core/sock.c:2468

Read of size 8 at addr ffff88802f4fc880 by task ksoftirqd/1/27

CPU: 1 PID: 27 Comm: ksoftirqd/1 Not tainted 6.8.0-rc1-syzkaller-00049-g6098d87eaf3

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/3151051b787f7cd7e3329ea0016eb9113c248812Refgit.kernel.org/stable/c/64babb17e8150771c58575d8f93a35c5296b499fRefgit.kernel.org/stable/c/6b950c712a9a05cdda4aea7fcb2848766576c11bRefgit.kernel.org/stable/c/8e51f084b5716653f19e291ed5f026791d4b3ed4Refgit.kernel.org/stable/c/9c333d9891f34cea8af1b229dc754552304c8eeeRefgit.kernel.org/stable/c/aa2b2eb3934859904c287bf5434647ba72e14c1cRefgit.kernel.org/stable/c/d0b5b1f12429df3cd9751ab8b2f53729b77733b7Refgit.kernel.org/stable/c/dbc1b89981f9c5360277071d33d7f04a43ffda4aRefgit.kernel.org/stable/c/3151051b787f7cd7e3329ea0016eb9113c248812Refgit.kernel.org/stable/c/64babb17e8150771c58575d8f93a35c5296b499f

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26625?

CVE-2024-26625 is a high-severity vulnerability. It was published on March 6, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-26625?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-26625?

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-2024-26625?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26625 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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