VulnerabilityPublished 24 Jun 2026Updated 6 Nov 2026

CVE-2026-52970: Linux kernel · netfilter: nft_ct: fix missing expect put in obj eval

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in ecca618e1e339494911090474ed87742c0f73976 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:49 UTC

Severity

Unrated

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

Thin evidence

One scorer or none

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, 2026-11-06.

Patch

Available – fixed in ecca618e1e339494911090474ed87742c0f73976, cdb9a25dd3416d427e8b2753210f8baf44207577, 84c422cea5a45fe56be839f25880f21fd33940cd +5

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Jun 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 6 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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 857b46027d6f91150797295752581b7155b9d0e1, < ecca618e1e339494911090474ed87742c0f73976	Fixed in ecca618e1e339494911090474ed87742c0f73976
LinuxLinux	Affected ≥ 857b46027d6f91150797295752581b7155b9d0e1, < cdb9a25dd3416d427e8b2753210f8baf44207577	Fixed in cdb9a25dd3416d427e8b2753210f8baf44207577
LinuxLinux	Affected ≥ 857b46027d6f91150797295752581b7155b9d0e1, < 84c422cea5a45fe56be839f25880f21fd33940cd	Fixed in 84c422cea5a45fe56be839f25880f21fd33940cd
LinuxLinux	Affected ≥ 857b46027d6f91150797295752581b7155b9d0e1, < 26ab32ec73941871c97562ee1f39587950dc3b68	Fixed in 26ab32ec73941871c97562ee1f39587950dc3b68
LinuxLinux	Affected ≥ 857b46027d6f91150797295752581b7155b9d0e1, < 19f94b6fee75b3ef7fbc06f3745b9a771a8a19a4	Fixed in 19f94b6fee75b3ef7fbc06f3745b9a771a8a19a4
LinuxLinux	Affected ≥ 857b46027d6f91150797295752581b7155b9d0e1, < 7b96242ceedfe249f158419f3254bcee04173ffe	Fixed in 7b96242ceedfe249f158419f3254bcee04173ffe

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_ct: fix missing expect put in obj eval nft_ct_expect_obj_eval() allocates an expectation and may call nf_ct_expect_related(), but never drops its local reference. Add nf_ct_expect_put(exp) before return to balance allocation.

References

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