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CVE-2026-52929

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: sctp: stream: fully roll back denied add-stream state When ADD_OUT_STREAMS is denied, SCTP only shrinks the queued chunks and t…

Published Jun 24, 2026CWE-476EPSS 0.53%

Overview

CVE-2026-52929 is a high-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

sctp: stream: fully roll back denied add-stream state

When ADD_OUT_STREAMS is denied, SCTP only shrinks the queued chunks and

then lowers outcnt. That leaves removed stream metadata behind, so a

later re-add can reuse a stale ext and hit a null-pointer dereference in

the scheduler get path.

Fix the rollback by tearing down the removed stream state the same way

other stream resizes do. Unschedule the current scheduler state, drop

the removed stream ext state with sctp_stream_outq_migrate(), and then

reschedule the remaining streams.

This keeps scheduler-private RR/FC/PRIO lists consistent while fully

rolling back denied outgoing stream additions.

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/0cd2dc6dce8ca47212cd306ccd52eb315ef3cf85Refgit.kernel.org/stable/c/1c6773b8c081509dcd5cd2954f2b02c50c00f151Refgit.kernel.org/stable/c/39dc2b0eb5371a669ebc9ec6072b9184eac95418Refgit.kernel.org/stable/c/7dd9a42b044aad2dbe037db1c1e2943582485b44Refgit.kernel.org/stable/c/9662eb0401518f0b4681f10e7fbf688f504f24cfRefgit.kernel.org/stable/c/a5f8a90ac9f77c678a9781c0a464b635e0d63e49Refgit.kernel.org/stable/c/a6724b7b812ac8793514a1d5938db5d9d29ae725Refgit.kernel.org/stable/c/d5ea0b3e261fcb2cfff142675516165244cab1da

How CyberStrike helps

Frequently asked questions

What is CVE-2026-52929?

CVE-2026-52929 is a high-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-52929?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-52929?

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-2026-52929?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-52929 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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