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CVE-2022-49979

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net: fix refcount bug in sk_psock_get (2) Syzkaller reports refcount bug as follows: ------------[ cut here ]------------ refco…

Published Jun 18, 2025EPSS 0.26%

Overview

CVE-2022-49979 is a high-severity vulnerability. It was published on June 18, 2025 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:

net: fix refcount bug in sk_psock_get (2)

Syzkaller reports refcount bug as follows:

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

refcount_t: saturated; leaking memory.

WARNING: CPU: 1 PID: 3605 at lib/refcount.c:19 refcount_warn_saturate+0xf4/0x1e0 lib/refcount.c:19

Modules linked in:

CPU: 1 PID: 3605 Comm: syz-executor208 Not tainted 5.18.0-syzkaller-03023-g7e062cda7d90 #0

<TASK>

__refcount_add_not_zero include/linux/refcount.h:163 [inline]

__refcount_inc_not_zero include/linux/refcount.h:227 [inline]

refcount_inc_not_zero include/linux/refcount.h:245 [inline]

sk_psock_get+0x3bc/0x410 include/linux/skmsg.h:439

tls_data_ready+0x6d/0x1b0 net/tls/tls_sw.c:2091

tcp_data_ready+0x106/0x520 net/ipv4/tcp_input.c:4983

tcp_data_queue+0x25f2/0x4c90 net/ipv4/tcp_input.c:5057

tcp_rcv_state_process+0x1774/0x4e80 net/ipv4/tcp_input.c:6659

tcp_v4_do_rcv+0x339/0x980 net/ipv4/tcp_ipv4.c:1682

sk_backlog_rcv include/net/sock.h:1061

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/2a0133723f9ebeb751cfce19f74ec07e108bef1fRefgit.kernel.org/stable/c/86026be8535c16fcc5e4f960286faf04d7f77815Refgit.kernel.org/stable/c/a5d1cb908131e939bd8b63b8e5e23365bbc2edaf

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49979?

CVE-2022-49979 is a high-severity vulnerability. It was published on June 18, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-49979?

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-2022-49979?

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-2022-49979?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49979 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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