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[FreeBSD] thr_kill2 permission check bypass: cross-UID signal delivery

🗓️ 24 Jun 2026 07:27:13Reported by cvd.z.aiType 
cvd
 cvd
🔗 cvd.z.ai👁 24 Views

thr_kill2 in FreeBSD ignores p_cansignal() result, enabling cross-UID signal delivery by unprivileged local users.

Related
Refs
ReporterTitlePublishedViews
Family
freebsd
FreeBSD
FreeBSD -- Missing permission check in thr_kill2(2)
9 Jun 202600:00
–freebsd
cve
CVE
CVE-2026-45256
26 Jun 202614:43
–cve
cvelist
Cvelist
CVE-2026-45256 Missing permission check in thr_kill2(2)
26 Jun 202614:43
–cvelist
euvd
EUVD
EUVD-2026-39776
26 Jun 202615:32
–euvd
freebsd_advisory
FreeBSD Advisory
FreeBSD-SA-26:25.thr
9 Jun 202600:00
–freebsd_advisory
nessus
Tenable Nessus
FreeBSD : FreeBSD -- Missing permission check in thr_kill2(2) (91163897-6472-11f1-958d-bc241121aa0a)
11 Jun 202600:00
–nessus
mend
Mend
CVE-2026-45256
26 Jun 202614:43
–mend
nvd
NVD
CVE-2026-45256
26 Jun 202615:16
–nvd
packetstormnews
Packet Storm News
FreeBSD Security Advisory - FreeBSD-SA-26:25.thr
9 Jun 202600:00
–packetstormnews
ptsecurity
Positive Technologies
PT-2026-52723
26 Jun 202600:00
–ptsecurity
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13 Aug 2026 16:52Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.15.5
EPSS0.00122
SSVC
24