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Permalink CVE-2026-57589

7.4 HIGH

CVSS version (CVSS): 3.1
Attack Vector (AV): Local (L)
Attack Complexity (AC): High (H)
Privileges Required (PR): None (N)
User Interaction (UI): None (N)
Scope (S): Unchanged (U)
Confidentiality (C): High (H)
Integrity (I): High (H)
Availability (A): High (H)
Modified Attack Vector (MAV): Local (L)
Modified Attack Complexity (MAC): High (H)
Modified Privileges Required (MPR): None (N)
Modified User Interaction (MUI): None (N)
Modified Confidentiality (MC): High (H)
Modified Scope (MS): Unchanged (U)
Modified Integrity (MI): High (H)
Modified Availability (MA): High (H)

created 2 weeks, 6 days ago Activity log

Created suggestion 2 weeks, 6 days ago

sys/kern/sysv_sem.c in OpenBSD through 7.9 has a use-after-free allowing local …

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().

References

Affected products

OpenBSD

=<7.9

Matching in nixpkgs

pkgs.netcat-openbsd

TCP/IP swiss army knife. OpenBSD variant

nixos-unstable 1.234-2
- nixpkgs-unstable 1.234-2
- nixos-unstable-small 1.234-2
nixos-26.05 1.234-2
- nixos-26.05-small 1.234-2
- nixpkgs-26.05-darwin 1.234-2

pkgs.nagiosPlugins.openbsd_snmp3_check

SNMP v3 check for OpenBSD systems state monitoring

nixos-unstable 0.55
- nixpkgs-unstable 0.55
- nixos-unstable-small 0.55
nixos-26.05 0.55
- nixos-26.05-small 0.55
- nixpkgs-26.05-darwin 0.55

Package maintainers

@jwillikers Jordan Williams <jordan@jwillikers.com>
@Artturin Artturi N <artturin@artturin.com>

Permalink CVE-2026-55706

5.8 MEDIUM

CVSS version (CVSS): 3.1
Attack Vector (AV): Adjacent (A)
Attack Complexity (AC): High (H)
Privileges Required (PR): None (N)
User Interaction (UI): None (N)
Scope (S): Changed (C)
Confidentiality (C): Low (L)
Integrity (I): Low (L)
Availability (A): Low (L)
Modified Attack Vector (MAV): Adjacent (A)
Modified Attack Complexity (MAC): High (H)
Modified Privileges Required (MPR): None (N)
Modified User Interaction (MUI): None (N)
Modified Confidentiality (MC): Low (L)
Modified Scope (MS): Changed (C)
Modified Integrity (MI): Low (L)
Modified Availability (MA): Low (L)

created 4 weeks ago Activity log

Created suggestion 4 weeks ago

sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass …

sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.