VulnerabilityPublished 23 Jan 2026Updated 5 Nov 2026

CVE-2025-71148: Linux kernel · net/handshake: restore destructor on submit failure

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in cd8cf2be3717137554744233fda051ffc09d1d44 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 23:24 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

EPSS

0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch

Available – fixed in cd8cf2be3717137554744233fda051ffc09d1d44, b225325be7b247c7268e65eea6090db1fc786d1f, 7b82a1d6ae869533d8bdb0282a3a78faed8e63dd +1

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to cd8cf2be3717137554744233fda051ffc09d1d44, b225325be7b247c7268e65eea6090db1fc786d1f, 7b82a1d6ae869533d8bdb0282a3a78faed8e63dd or 6af2a01d65f89e73c1cbb9267f8880d83a88cee4.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 3b3009ea8abb713b022d94fba95ec270cf6e7eae, < cd8cf2be3717137554744233fda051ffc09d1d44	Fixed in cd8cf2be3717137554744233fda051ffc09d1d44
LinuxLinux	Affected ≥ 3b3009ea8abb713b022d94fba95ec270cf6e7eae, < b225325be7b247c7268e65eea6090db1fc786d1f	Fixed in b225325be7b247c7268e65eea6090db1fc786d1f
LinuxLinux	Affected ≥ 3b3009ea8abb713b022d94fba95ec270cf6e7eae, < 7b82a1d6ae869533d8bdb0282a3a78faed8e63dd	Fixed in 7b82a1d6ae869533d8bdb0282a3a78faed8e63dd
LinuxLinux	Affected ≥ 3b3009ea8abb713b022d94fba95ec270cf6e7eae, < 6af2a01d65f89e73c1cbb9267f8880d83a88cee4	Fixed in 6af2a01d65f89e73c1cbb9267f8880d83a88cee4
LinuxLinux	Affected =6.4	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: net/handshake: restore destructor on submit failure handshake_req_submit() replaces sk->sk_destruct but never restores it when submission fails before the request is hashed. handshake_sk_destruct() then returns early and the original destructor never runs, leaking the socket. Restore sk_destruct on the error path.

References

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