Vulnerability-Lookup

CVE-2026-53238 (GCVE-0-2026-53238)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-06-25 08:39

Title

netlabel: validate unlabeled address and mask attribute lengths

Summary

In the Linux kernel, the following vulnerability has been resolved: netlabel: validate unlabeled address and mask attribute lengths netlbl_unlabel_addrinfo_get() used the address attribute length to determine whether the attribute data could be read as an IPv4 or IPv6 address, but did not independently validate the corresponding mask attribute length. A crafted Generic Netlink request could therefore provide a valid IPv4/IPv6 address attribute with a shorter mask attribute, which would later be read as a full struct in_addr or struct in6_addr. NLA_BINARY policy lengths are maximum lengths by default, so use NLA_POLICY_EXACT_LEN() for the unlabeled IPv4/IPv6 address and mask attributes. This rejects short attributes during policy validation and also exposes the exact length requirements through policy introspection.

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/975a84fd741440853…
https://git.kernel.org/stable/c/672f0f3b8f875ffe6…
https://git.kernel.org/stable/c/95bda3eac0b1454c2…
https://git.kernel.org/stable/c/07a18f5c90dd3d586…
https://git.kernel.org/stable/c/71c52da13c3737493…
https://git.kernel.org/stable/c/0c4bb32ad7fdc2dc6…
https://git.kernel.org/stable/c/ccfe292a966079c61…
https://git.kernel.org/stable/c/9772589b57e44aedc…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd , < 975a84fd741440853380d37465b6e226cf47254c (git) Affected: 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd , < 672f0f3b8f875ffe6525a37847eafa7648c4c0c6 (git) Affected: 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd , < 95bda3eac0b1454c2cee98d58d9ba6dd8391e843 (git) Affected: 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd , < 07a18f5c90dd3d586b73242f5a5bbf0a72f2fdc6 (git) Affected: 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd , < 71c52da13c3737493b42d20d9f33de34e03b3156 (git) Affected: 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd , < 0c4bb32ad7fdc2dc6a8050f41eb04d4bda56b6c8 (git) Affected: 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd , < ccfe292a966079c61ea68a2da303b2a336170993 (git) Affected: 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd , < 9772589b57e44aedc240211c5c3f7a684a034d3a (git)	guessed
Linux	Linux	Affected: 2.6.25 Unaffected: 0 , < 2.6.25 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)	guessed

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A crafted Generic Netlink request could therefore\\nprovide a valid IPv4/IPv6 address attribute with a shorter mask\\nattribute, which would later be read as a full struct in_addr or\\nstruct in6_addr.\\n\\nNLA_BINARY policy lengths are maximum lengths by default, so use\\nNLA_POLICY_EXACT_LEN() for the unlabeled IPv4/IPv6 address and mask\\nattributes.  This rejects short attributes during policy validation and\\nalso exposes the exact length requirements through policy introspection.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/netlabel/netlabel_unlabeled.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd\",\"lessThan\":\"975a84fd741440853380d37465b6e226cf47254c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd\",\"lessThan\":\"672f0f3b8f875ffe6525a37847eafa7648c4c0c6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd\",\"lessThan\":\"95bda3eac0b1454c2cee98d58d9ba6dd8391e843\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd\",\"lessThan\":\"07a18f5c90dd3d586b73242f5a5bbf0a72f2fdc6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd\",\"lessThan\":\"71c52da13c3737493b42d20d9f33de34e03b3156\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd\",\"lessThan\":\"0c4bb32ad7fdc2dc6a8050f41eb04d4bda56b6c8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd\",\"lessThan\":\"ccfe292a966079c61ea68a2da303b2a336170993\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd\",\"lessThan\":\"9772589b57e44aedc240211c5c3f7a684a034d3a\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/netlabel/netlabel_unlabeled.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.25\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.25\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.259\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.210\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.176\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.143\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.94\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.36\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.13\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.25\",\"versionEndExcluding\":\"5.10.259\",\"matchCriteriaId\":\"3D7B1C25-B15B-469B-86ED-C02BFEC9F0DB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.210\",\"matchCriteriaId\":\"5E938CDF-D1C4-43D0-98DC-9E11B6B55801\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.176\",\"matchCriteriaId\":\"C4446623-5F2B-4DD8-8666-9FAAC285A757\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.143\",\"matchCriteriaId\":\"9062F1CD-CAD6-4EA2-A73F-C06D4A887B8C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.94\",\"matchCriteriaId\":\"85421C0C-ABDE-4357-971C-67F9087DE1B9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.36\",\"matchCriteriaId\":\"389025D2-958D-41BD-BD96-70ED1033A9F3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"7.0.13\",\"matchCriteriaId\":\"6A64BF9F-3BCA-42FD-98CB-8F03474D2B1E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B1EF7059-E670-45F4-B422-54C40FA86390\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"0D38F0BF-A728-4133-A358-D44A2F7EE6D6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"EC732D08-5F7B-46D9-B154-E60C7F4F0A97\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"E5910A9D-F60A-409A-B486-FE66BFEBA9B9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"81DFF19E-9CF8-49C6-8C36-1E4038622933\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"B0E8FC71-3952-444C-83E9-718DBBBEC615\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"1039E95A-8CC3-4C88-8FF9-5C08EEB861C9\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/07a18f5c90dd3d586b73242f5a5bbf0a72f2fdc6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/0c4bb32ad7fdc2dc6a8050f41eb04d4bda56b6c8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/672f0f3b8f875ffe6525a37847eafa7648c4c0c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/71c52da13c3737493b42d20d9f33de34e03b3156\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/95bda3eac0b1454c2cee98d58d9ba6dd8391e843\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/975a84fd741440853380d37465b6e226cf47254c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9772589b57e44aedc240211c5c3f7a684a034d3a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ccfe292a966079c61ea68a2da303b2a336170993\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-08T13:26:53+00:00",
      "cve": "CVE-2026-53238",
      "id": "CVE-2026-53238",
      "initial_release_date": "2026-06-25T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: netlabel: validate unlabeled address and mask attribute lengths",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53238.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-09-15T02:02:13Z",
      "cve": "CVE-2026-53238",
      "id": "CVE-2026-53238",
      "initial_release_date": "2026-06-26T02:09:04Z",
      "product_status:first_fixed": "88",
      "product_status:known_affected": "765",
      "product_status:recommended": "42",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53238",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53238.json",
      "version": "9"
    }
  }
}

SUSE-SU-2026:23529-1

Vulnerability from csaf_suse - Published: 2026-09-08 11:00 - Updated: 2026-09-15 16:10

Summary

Security update for the Linux Kernel

Severity

Important

Scope

588 vulnerabilities in this advisory, including CVE-2026-53238.

CVE-2026-53238

2.3 (Low)


                
                  CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

Recommended: 17 products

Open the full advisory

SUSE-SU-2026:4120-1

Vulnerability from csaf_suse - Published: 2026-09-10 09:31 - Updated: 2026-09-15 16:11

Summary

Security update for the Linux Kernel

Severity

Important

Scope

662 vulnerabilities in this advisory, including CVE-2026-53238.

CVE-2026-53238

2.3 (Low)


                
                  CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

Recommended: 19 products

Open the full advisory

ubuntu-cve-2026-53238

Vulnerability from osv_ubuntu

Published

2026-06-25 09:16

Modified

2026-09-15 12:00

Summary

Details

Severity

5.5 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2026-53238	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-53238	REPORT
	https://git.kernel.org/linus/9772589b57e44aedc240…	REPORT
	https://git.kernel.org/stable/c/07a18f5c90dd3d586…	REPORT
	https://git.kernel.org/stable/c/0c4bb32ad7fdc2dc6…	REPORT
	https://git.kernel.org/stable/c/672f0f3b8f875ffe6…	REPORT
	https://git.kernel.org/stable/c/71c52da13c3737493…	REPORT
	https://git.kernel.org/stable/c/95bda3eac0b1454c2…	REPORT
	https://git.kernel.org/stable/c/975a84fd741440853…	REPORT
	https://git.kernel.org/stable/c/9772589b57e44aedc…	REPORT
	https://git.kernel.org/stable/c/ccfe292a966079c61…	REPORT
	https://ubuntu.com/security/notices/USN-8726-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8727-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8728-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8760-1	ADVISORY

JSON

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WID-SEC-W-2026-2077

Vulnerability from csaf_certbund - Published: 2026-06-24 22:00 - Updated: 2026-08-10 22:00

Summary

Linux Kernel: Mehrere Schwachstellen

Severity

Hoch

Scope

331 vulnerabilities in this advisory, including CVE-2026-53238.

CVE-2026-53238

Known affected: 11 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-53238 (GCVE-0-2026-53238)

SUSE-SU-2026:23529-1

SUSE-SU-2026:4120-1

ubuntu-cve-2026-53238

Vulnerability from osv_ubuntu

WID-SEC-W-2026-2077

Tags

Sightings

Nomenclature