CVE-2026-53352: signal: clear JOBCTL_PENDING_MASK for caller in zap_other_threads()

mediumCVSS 5.5CVE-2026-53352

CSIRTS triage

Other

What: This vulnerability involves clearing JOBCTL_PENDING_MASK for the caller in zap_other_threads().
Who is affected: Affected systems are those utilizing the signal handling functionality.
Urgency: Medium urgency for remediation due to a CVSS score of 5.5.
Action: Monitor for patches or updates addressing this issue.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-07-02
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53352

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-533520.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53352	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for signal

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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