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CVE-2022-48855

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: sctp: fix kernel-infoleak for SCTP sockets syzbot reported a kernel infoleak [1] of 4 bytes.

Published Jul 16, 2024CWE-401EPSS 0.23%

Overview

CVE-2022-48855 is a high-severity vulnerability. It was published on July 16, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, 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:

sctp: fix kernel-infoleak for SCTP sockets

syzbot reported a kernel infoleak [1] of 4 bytes.

After analysis, it turned out r->idiag_expires is not initialized

if inet_sctp_diag_fill() calls inet_diag_msg_common_fill()

Make sure to clear idiag_timer/idiag_retrans/idiag_expires

and let inet_diag_msg_sctpasoc_fill() fill them again if needed.

[1]

BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline]

BUG: KMSAN: kernel-infoleak in copyout lib/iov_iter.c:154 [inline]

BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x6ef/0x25a0 lib/iov_iter.c:668

instrument_copy_to_user include/linux/instrumented.h:121 [inline]

copyout lib/iov_iter.c:154 [inline]

_copy_to_iter+0x6ef/0x25a0 lib/iov_iter.c:668

copy_to_iter include/linux/uio.h:162 [inline]

simple_copy_to_iter+0xf3/0x140 net/core/datagram.c:519

__skb_datagram_iter+0x2d5/0x11b0 net/core/datagram.c:425

skb_copy_datagram_iter+0xd

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/1502f15b9f29c41883a6139f2923523873282a83Refgit.kernel.org/stable/c/2d8fa3fdf4542a2174a72d92018f488d65d848c5Refgit.kernel.org/stable/c/3fc0fd724d199e061432b66a8d85b7d48fe485f7Refgit.kernel.org/stable/c/41a2864cf719c17294f417726edd411643462ab8Refgit.kernel.org/stable/c/633593a808980f82d251d0ca89730d8bb8b0220cRefgit.kernel.org/stable/c/b7e4d9ba2ddb78801488b4c623875b81fb46b545Refgit.kernel.org/stable/c/bbf59d7ae558940cfa2b36a287fd1e88d83f89f8Refgit.kernel.org/stable/c/d828b0fe6631f3ae8709ac9a10c77c5836c76a08Refgit.kernel.org/stable/c/1502f15b9f29c41883a6139f2923523873282a83Refgit.kernel.org/stable/c/2d8fa3fdf4542a2174a72d92018f488d65d848c5

How CyberStrike helps

Frequently asked questions

What is CVE-2022-48855?

CVE-2022-48855 is a high-severity vulnerability. It was published on July 16, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2022-48855?

This vulnerability has a CVSS 3.1 base score of 7.1, 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-2022-48855?

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-2022-48855?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-48855 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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