CVE-2026-52970
Analyzed Analyzed - Analysis Complete

Missing Expectation Release in Linux Kernel Netfilter

Vulnerability report for CVE-2026-52970, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-06-24

Last updated on: 2026-07-14

Assigner: kernel.org

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.

CVSS Scores

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Meta Information

Published
2026-06-24
Last Modified
2026-07-14
Generated
2026-07-15
AI Q&A
2026-06-24
EPSS Evaluated
2026-07-13
NVD
EUVD

Affected Vendors & Products

Showing 10 associated CPEs
Vendor Product Version / Range
linux linux_kernel 7.1
linux linux_kernel 7.1
linux linux_kernel 7.1
linux linux_kernel From 6.2 (inc) to 6.6.141 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.91 (exc)
linux linux_kernel From 6.13 (inc) to 6.18.33 (exc)
linux linux_kernel From 6.19 (inc) to 7.0.10 (exc)
linux linux_kernel From 5.16 (inc) to 6.1.175 (exc)
linux linux_kernel From 5.11 (inc) to 5.15.209 (exc)
linux linux_kernel From 5.3 (inc) to 5.10.258 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is in the Linux kernel's netfilter component, specifically in the nft_ct module. The function nft_ct_expect_obj_eval() allocates an expectation object and may call nf_ct_expect_related(), but it fails to properly release the local reference to the allocated expectation. This missing release (missing expect put) can lead to resource management issues.

Impact Analysis

Because the function does not properly release allocated expectation objects, it can cause resource leaks within the kernel. This may lead to increased memory usage or exhaustion of kernel resources, potentially degrading system performance or stability.

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