Is CVE-2026-43916 actively exploited?

No active exploitation of CVE-2026-43916 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-43916 be exploited remotely?

Yes. CVE-2026-43916 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-43916?

CVE-2026-43916 has a CVSS score of 8.7 (HIGH).

HOME VULNERABILITIESCVE-2026-43916

HIGH

CVE-2026-43916

CWE-125Published: May 12, 2026· Updated: May 13, 2026

8.7

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.9th

Official Description

pam_authnft is a PAM session module binding nftables firewall rules to authenticated sessions via cgroupv2 inodes. Prior to 0.2.0-alpha, a heap buffer over-read in peer_lookup_tcp (src/peer_lookup.c:134, prior to the fix) allowed a crafted NETLINK_SOCK_DIAG reply to slip past the message-size check, then dereference past the end of the allocation. This vulnerability is fixed in 0.2.0-alpha.

NVD Source

Technical Analysis

CVE-2026-43916 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X