Bug 2492430 (CVE-2026-52970) - CVE-2026-52970 kernel: netfilter: nft_ct: fix missing expect put in obj eval
Summary: CVE-2026-52970 kernel: netfilter: nft_ct: fix missing expect put in obj eval
Keywords:
Status: NEW
Alias: CVE-2026-52970
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-24 18:11 UTC by OSIDB Bzimport
Modified: 2026-06-26 11:34 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-06-24 18:11:39 UTC 
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.
Comment 1 Mauro Matteo Cascella 2026-06-26 11:31:53 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062439-CVE-2026-52970-8bc3@gregkh/T
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