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Review reviewHigh

CVE-2026-53005

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: af_unix: Drop all SCM attributes for SOCKMAP. SOCKMAP can hide inflight fd from AF_UNIX GC. When a socket in SOCKMAP receives skb with inflight fd, sk_psock_verdict_data_ready() looks up the mapped socket and enqueue skb to its psock->ingress_skb. Since neither the old nor the new GC can inspect the psock queue, the hidden skb leaks the inflight sockets. Note that this cannot be detected via kmemleak because inflight sockets are linked to a global list. In addition, SOCKMAP redirect breaks the Tarjan-based GC's assumption t...

CVSS
7.8
EPSS
0.13%
3.33% percentile
CISA KEV
Not listed
Published
2026.06.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.13%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: af_unix: Drop all SCM attributes for SOCKMAP. SOCKMAP can hide inflight fd from AF_UNIX GC. When a socket in SOCKMAP receives skb with inflight fd, sk_psock_verdict_data_ready() looks up the mapped socket and enqueue skb to its psock->ingress_skb. Since neither the old nor the new GC can inspect the psock queue, the hidden skb leaks the inflight sockets. Note that this cannot be detected via kmemleak because inflight sockets are linked to a global list. In addition, SOCKMAP redirect breaks the Tarjan-based GC's assumption t...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= c63829182c37c2d6d0608976d15fa61ebebe9e6b < 48c41cd2e04af4b2cdef19e2d00994ae82952f14, >= c63829182c37c2d6d0608976d15fa61ebebe9e6b < e0a71cbf0c1906a2eccbe69dd7d7f36fd1511d66, >= c63829182c37c2d6d0608976d15fa61ebebe9e6b < b34a1d83c74a124c968b5adb25c809db3e2eb86a, >= c63829182c37c2d6d0608976d15fa61ebebe9e6b < 965dc93481d1b80d341bdd16c27b16fe197175ee, >= 5.15, >= 5.15 < 7.0.10
Fixed versions
7.0.10

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416
CVE-2026-53005 — Linux Linux, linux kernel | SECUFOCUS NOW