CVE-2026-52920
netfilter: xt_policy: fix strict mode inbound policy matching
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_policy: fix strict mode inbound policy matching match_policy_in() walks sec_path entries from the last transform to the first one, but strict policy matching needs to consume info->pol[] in the same forward order as the rule layout. Derive the strict-match policy position from the number of transforms already consumed so that multi-element inbound rules are matched consistently.
INFO
Published Date :
June 24, 2026, 8:16 a.m.
Last Modified :
July 8, 2026, 5:58 p.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel to include the netfilter patch.
- Ensure inbound rules consistently match policy positions.
- Verify strict mode policy matching behavior.
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-2026-52920.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-52920 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-2026-52920
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-2026-52920 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-52920 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.
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Initial Analysis by [email protected]
Jul. 08, 2026
Action Type Old Value New Value 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:*:*:*:*:*:*:*:* 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) 2.6.17 up to (excluding) 5.10.258 Added Reference Type kernel.org: https://git.kernel.org/stable/c/392cc1d8408b5665215c1e9290bbf0f92339b043 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4b2b4d7d4e203c92db8966b163edfacb1f0e1e29 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/82664d0f1ba25e4f9a71994954abae24c60f4067 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/938867e870fb5471bb16f442aeac81326e05bf65 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b130a6eefa02bd4d475f2f059da8bcfb3e7d18d9 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/eb323f7b82d2e2f638de0cc2a177803eb20e0707 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/f98b7f85e04b40e28b08c461ded0cc79f14f5509 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/fc1c518bb1f054831ecabb32da9b8e1dff9699c6 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H -
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': 'c4b885139203d37f76662c37ae645fe8e0f4e4e5', 'lessThan': 'eb323f7b82d2e2f638de0cc2a177803eb20e0707', 'versionType': 'git'}, {'status': 'affected', 'version': 'c4b885139203d37f76662c37ae645fe8e0f4e4e5', 'lessThan': 'fc1c518bb1f054831ecabb32da9b8e1dff9699c6', 'versionType': 'git'}, {'status': 'affected', 'version': 'c4b885139203d37f76662c37ae645fe8e0f4e4e5', 'lessThan': 'f98b7f85e04b40e28b08c461ded0cc79f14f5509', 'versionType': 'git'}, {'status': 'affected', 'version': 'c4b885139203d37f76662c37ae645fe8e0f4e4e5', 'lessThan': '82664d0f1ba25e4f9a71994954abae24c60f4067', 'versionType': 'git'}, {'status': 'affected', 'version': 'c4b885139203d37f76662c37ae645fe8e0f4e4e5', 'lessThan': 'b130a6eefa02bd4d475f2f059da8bcfb3e7d18d9', 'versionType': 'git'}, {'status': 'affected', 'version': 'c4b885139203d37f76662c37ae645fe8e0f4e4e5', 'lessThan': '938867e870fb5471bb16f442aeac81326e05bf65', 'versionType': 'git'}, {'status': 'affected', 'version': 'c4b885139203d37f76662c37ae645fe8e0f4e4e5', 'lessThan': '392cc1d8408b5665215c1e9290bbf0f92339b043', 'versionType': 'git'}, {'status': 'affected', 'version': 'c4b885139203d37f76662c37ae645fe8e0f4e4e5', 'lessThan': '4b2b4d7d4e203c92db8966b163edfacb1f0e1e29', 'versionType': 'git'}], 'programFiles': ['net/netfilter/xt_policy.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.17', '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/xt_policy.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_policy: fix strict mode inbound policy matching match_policy_in() walks sec_path entries from the last transform to the first one, but strict policy matching needs to consume info->pol[] in the same forward order as the rule layout. Derive the strict-match policy position from the number of transforms already consumed so that multi-element inbound rules are matched consistently. Added Reference https://git.kernel.org/stable/c/392cc1d8408b5665215c1e9290bbf0f92339b043 Added Reference https://git.kernel.org/stable/c/4b2b4d7d4e203c92db8966b163edfacb1f0e1e29 Added Reference https://git.kernel.org/stable/c/82664d0f1ba25e4f9a71994954abae24c60f4067 Added Reference https://git.kernel.org/stable/c/938867e870fb5471bb16f442aeac81326e05bf65 Added Reference https://git.kernel.org/stable/c/b130a6eefa02bd4d475f2f059da8bcfb3e7d18d9 Added Reference https://git.kernel.org/stable/c/eb323f7b82d2e2f638de0cc2a177803eb20e0707 Added Reference https://git.kernel.org/stable/c/f98b7f85e04b40e28b08c461ded0cc79f14f5509 Added Reference https://git.kernel.org/stable/c/fc1c518bb1f054831ecabb32da9b8e1dff9699c6