CVE-2026-53238 Details
Description
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.
A vulnerability in the Linux kernel's Netlabel component allows for improper validation of unlabeled address and mask attribute lengths. The issue arises in the 'netlbl_unlabel_addrinfo_get()' function, which uses the address attribute length to determine if the data can be interpreted as an IPv4 or IPv6 address. However, it fails to independently validate the corresponding mask attribute length. This oversight could be exploited by sending a crafted Generic Netlink request that includes a valid IPv4 or IPv6 address attribute with a shorter mask attribute. As a result, the mask would be read incorrectly, leading to potential misconfigurations or security issues. The vulnerability affects several versions of the Linux kernel.
The vulnerability has been fixed in the Linux kernel. Users should upgrade to the latest version of the stable Linux kernel where this issue has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/07a18f5c90dd3d586b73242f5a5bbf0a72f2fdc6 | kernel.org | Patch |
| https://git.kernel.org/stable/c/0c4bb32ad7fdc2dc6a8050f41eb04d4bda56b6c8 | kernel.org | Patch |
| https://git.kernel.org/stable/c/672f0f3b8f875ffe6525a37847eafa7648c4c0c6 | kernel.org | Patch |
| https://git.kernel.org/stable/c/71c52da13c3737493b42d20d9f33de34e03b3156 | kernel.org | Patch |
| https://git.kernel.org/stable/c/95bda3eac0b1454c2cee98d58d9ba6dd8391e843 | kernel.org | Patch |
| https://git.kernel.org/stable/c/975a84fd741440853380d37465b6e226cf47254c | kernel.org | Patch |
| https://git.kernel.org/stable/c/9772589b57e44aedc240211c5c3f7a684a034d3a | kernel.org | Patch |
| https://git.kernel.org/stable/c/ccfe292a966079c61ea68a2da303b2a336170993 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 2.6.25, < 5.10.259 >= 5.11, < 5.15.210 >= 5.16, < 6.1.176 >= 6.2, < 6.6.143 >= 6.7, < 6.12.94 >= 6.13, < 6.18.36 >= 6.19, < 7.0.13 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 7.1 rc5 7.1 rc6 7.1 rc7 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 8, 2026 | Initial Analysis | [email protected] |
| Jun 25, 2026 | New CVE Received | kernel.org |