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CVE-2026-74490

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: tipc: avoid use-after-free in poll trace queue dumps TIPC socket tracepoints dump queue state through tipc_sk_dump().

Published Aug 15, 2026EPSS 0.46%

Overview

CVE-2026-74490 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

tipc: avoid use-after-free in poll trace queue dumps

TIPC socket tracepoints dump queue state through tipc_sk_dump(). Most

queue-dump callsites already serialize that walk under the socket lock or

sk->sk_lock.slock, but tipc_poll() calls trace_tipc_sk_poll(...,

TIPC_DUMP_ALL, ...) without holding either lock.

That lets the poll trace path reach tipc_list_dump() and backlog head/tail

dumping while another context dequeues and frees an skb, leaving the trace

helper dereferencing a stale queue entry.

Stop the unlocked poll trace site from requesting queue dumps. Other queue

dump trace callsites keep their existing output under the locking they

already provide, while poll still emits the event itself without walking

live queue members from an unlocked context.

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/3cd57c6b210d50fd1f7ac1720442ba5be5dc94f8Refgit.kernel.org/stable/c/5e82beba4bc1f91d0e64c9c43f2b2fa9cd1c2a7dRefgit.kernel.org/stable/c/78706367fe1b98aee0a6de27c62b7f1e3035f38dRefgit.kernel.org/stable/c/ac2f787980fdf4364cd5651a4c8128e59b8de3aaRefgit.kernel.org/stable/c/ae7fc824970888b4fdaa076819c9a6f2fcede275Refgit.kernel.org/stable/c/b4f1719dfea023220e0e6bd892b087d76b2a6a49Refgit.kernel.org/stable/c/bed792737b5f1ba773054dbe984502958bdfe6ceRefgit.kernel.org/stable/c/d7940bb6a8e7ab28f972c2875cb05783216312dc

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74490?

CVE-2026-74490 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-74490?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-74490?

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-2026-74490?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74490 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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