CVE-2026-57589

highpriority · track · 31EPSS 0.002 · 6 %ileDEEUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.17% (6th) EPSS
CVSS 7.8 · high
Is it mine?
3 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

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().

01

cvss

Technical severity, 0–10. One row per scoring source.

7.8
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9
v3.17.4highCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU
v3.17.4highCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · cve@mitre.org USexploitability 1.4 · impact 5.9
v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416US
04

affected products (3)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-2066OpenBSD: Schwachstelle ermöglicht PrivilegieneskalationDeutsch2026-06-24csaf · cert_bundDE

    Ein lokaler Angreifer kann eine Schwachstelle in OpenBSD ausnutzen, um seine Privilegien zu erhöhen.

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcert_bundnvdNVDCVE.orgMITRE
published 2026-06-25modified 2026-07-10
08

references (6)

External citations — patches, advisories, analysis.

scry

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