What’s Vulnerable › Vulnerabilities

CVE-2026-57589

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-25 · updated 2026-07-10
• Weakness: CWE-416

Description

sys/kern/sysv_sem.c in OpenBSD through 7.9 has a use-after-free allowing local privilege escalation to root. This is a context switch use-after-free after tsleep in sys_semget().

Affected products

• OpenBSD: through 7.9

References

• https://github.com/openbsd/src/commit/1957873d2063db11dab780eca75b5e629d1e838d
• https://openai.com/index/patch-the-planet/

Get alerted when CVE-2026-57589 or the next vulnerability affects your stack