CVE-2026-52970
netfilter: nft_ct: fix missing expect put in obj eval
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.
INFO
Published Date :
June 24, 2026, 5:17 p.m.
Last Modified :
July 14, 2026, 7:45 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Add nf_ct_expect_put before returning from nft_ct_expect_obj_eval.
- Review and balance all expectation reference counts.
- Apply the latest kernel patches.
- Test the system thoroughly after applying changes.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-52970.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-52970 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-52970
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-52970 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-52970 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.141 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.91 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.33 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.10 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.175 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.3 up to (excluding) 5.10.258 Added Reference Type kernel.org: https://git.kernel.org/stable/c/19f94b6fee75b3ef7fbc06f3745b9a771a8a19a4 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/1dced0725e2fae3ac3416274db20a7ff5a46931d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/26ab32ec73941871c97562ee1f39587950dc3b68 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2aef1b13d5c0285f340512c6c07eb858fd018fd8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7b96242ceedfe249f158419f3254bcee04173ffe Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/84c422cea5a45fe56be839f25880f21fd33940cd Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/cdb9a25dd3416d427e8b2753210f8baf44207577 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ecca618e1e339494911090474ed87742c0f73976 Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 24, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '857b46027d6f91150797295752581b7155b9d0e1', 'lessThan': 'cdb9a25dd3416d427e8b2753210f8baf44207577', 'versionType': 'git'}, {'status': 'affected', 'version': '857b46027d6f91150797295752581b7155b9d0e1', 'lessThan': '26ab32ec73941871c97562ee1f39587950dc3b68', 'versionType': 'git'}, {'status': 'affected', 'version': '857b46027d6f91150797295752581b7155b9d0e1', 'lessThan': '7b96242ceedfe249f158419f3254bcee04173ffe', 'versionType': 'git'}, {'status': 'affected', 'version': '857b46027d6f91150797295752581b7155b9d0e1', 'lessThan': 'ecca618e1e339494911090474ed87742c0f73976', 'versionType': 'git'}, {'status': 'affected', 'version': '857b46027d6f91150797295752581b7155b9d0e1', 'lessThan': '2aef1b13d5c0285f340512c6c07eb858fd018fd8', 'versionType': 'git'}, {'status': 'affected', 'version': '857b46027d6f91150797295752581b7155b9d0e1', 'lessThan': '1dced0725e2fae3ac3416274db20a7ff5a46931d', 'versionType': 'git'}, {'status': 'affected', 'version': '857b46027d6f91150797295752581b7155b9d0e1', 'lessThan': '84c422cea5a45fe56be839f25880f21fd33940cd', 'versionType': 'git'}, {'status': 'affected', 'version': '857b46027d6f91150797295752581b7155b9d0e1', 'lessThan': '19f94b6fee75b3ef7fbc06f3745b9a771a8a19a4', 'versionType': 'git'}], 'programFiles': ['net/netfilter/nft_ct.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.258', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.209', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.141', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.91', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.33', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.10', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/netfilter/nft_ct.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/19f94b6fee75b3ef7fbc06f3745b9a771a8a19a4 Added Reference https://git.kernel.org/stable/c/1dced0725e2fae3ac3416274db20a7ff5a46931d Added Reference https://git.kernel.org/stable/c/26ab32ec73941871c97562ee1f39587950dc3b68 Added Reference https://git.kernel.org/stable/c/2aef1b13d5c0285f340512c6c07eb858fd018fd8 Added Reference https://git.kernel.org/stable/c/7b96242ceedfe249f158419f3254bcee04173ffe Added Reference https://git.kernel.org/stable/c/84c422cea5a45fe56be839f25880f21fd33940cd Added Reference https://git.kernel.org/stable/c/cdb9a25dd3416d427e8b2753210f8baf44207577 Added Reference https://git.kernel.org/stable/c/ecca618e1e339494911090474ed87742c0f73976