CVE-2026-53005: af_unix: Drop all SCM attributes for SOCKMAP.

highCVSS 7.8CVE-2026-53005

CSIRTS triage

Other

What: This vulnerability involves dropping all SCM attributes for SOCKMAP.
Who is affected: Deployments using the af_unix socket.
Urgency: Remediation is urgent due to the high severity rating of 7.8.
Action: Apply relevant patches as they become available.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.8
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53005

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-530050.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53005	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownUSN-8664-1: Linux kernel (NVIDIA BaseOS) vulnerabilitiesubuntu
unknownUSN-8663-1: Linux kernel (NVIDIA) vulnerabilitiesubuntu
unknownMultiple vulnerabilities in Debian Linux kernel (August 07, 2026)cert-fr-avis
unknownDSA-6405-1 linux - security updatedebian
highUSN-8618-1: Linux kernel vulnerabilitiesubuntu
highUSN-8603-1: Linux kernel (Azure) vulnerabilitiesubuntu
highUSN-8593-1: Linux kernel vulnerabilitiesubuntu
highUSN-8569-1: Linux kernel (HWE) vulnerabilitiesubuntu
highUSN-8568-1: Linux kernel (OEM) vulnerabilitiesubuntu
highUSN-8566-1: Linux kernel vulnerabilitiesubuntu

Recent advisories for af_unix

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-63388: Libevent: Heap out-of-bounds write in bufferevent_socket_set_conn_address_ reachable via AF_UN…msrc · 2026-08-11
mediumGHSA-wh89-7897-x99h: Netty: HAProxy V1 Protocol CRLF Injection via AF_UNIX Addressghsa · 2026-07-22
highCVE-2026-64109: In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix UAF read of t…nvd · 2026-07-19
mediumCVE-2026-53361: af_unix: Set gc_in_progress to true in unix_gc().msrc · 2026-07-14
unknownCVE-2026-53361: In the Linux kernel, the following vulnerability has been resolved: af_unix: Set gc_in_progres…nvd · 2026-07-04
highCVE-2026-53034: bpf, sockmap: Fix af_unix null-ptr-deref in proto updatemsrc · 2026-06-09