CVE-2026-52970

netfilter: nft_ct: fix missing expect put in obj eval

MEDIUM

5.5

CVSS Score

Published: June 24, 2026 at 04:28 PM UTC

Updated: October 15, 2026 at 02:19 AM UTC

4 products affected across 2 vendorsLinux KernelSIMATIC S7-1500 CPU 1518-4 Pn /dp MFP FirmwareSiplus S7-1500 CPU 1518-4 Pn /dp MFP Firmware

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

5.11 ≤ v < 5.15.2095.16 ≤ v < 6.1.1755.3 ≤ v < 5.10.2586.13 ≤ v < 6.18.336.19 ≤ v < 7.0.106.2 ≤ v < 6.6.1416.7 ≤ v < 6.12.917.1 7.1 rc1 7.1 rc2 7.1 rc3857b46027d6f91150797295752581b7155b9d0e1

Vendor states this is fixed in 19f94b6fee75b3ef7fbc06f3745b9a771a8a19a4 (fixed)

Vendor states this is fixed in 1dced0725e2fae3ac3416274db20a7ff5a46931d (fixed)

Vendor states this is fixed in 26ab32ec73941871c97562ee1f39587950dc3b68 (fixed)

Vendor states this is fixed in 2aef1b13d5c0285f340512c6c07eb858fd018fd8 (fixed)

Vendor states this is fixed in 7b96242ceedfe249f158419f3254bcee04173ffe (fixed)

Vendor states this is fixed in 84c422cea5a45fe56be839f25880f21fd33940cd (fixed)

Vendor states this is fixed in cdb9a25dd3416d427e8b2753210f8baf44207577 (fixed)

Vendor states this is fixed in ecca618e1e339494911090474ed87742c0f73976 (fixed)

Vendor states this is fixed in 5.10.258 (unaffected)

Vendor states this is fixed in 5.15.209 (unaffected)

Vendor states this is fixed in 5.3 (unaffected)

Vendor states this is fixed in 6.1.175 (unaffected)