CVE-2024-26849: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: netlink: add nla be16/32 types to minlen array BUG: KMSAN: uninit-value in nla_validate_range_unsigned lib/nlattr.c:222 [inline] BUG: KMSAN: uninit-value in nla_validate_int_range lib/nlattr.c:336 [inline] BUG: KMSAN: uninit-value in validate_nla lib/nlattr.c:575 [inline] BUG: KMSAN: uninit-value in __nla_validate_parse+0x2e20/0x45c0 lib/nlattr.c:631 nla_validate_range_unsigned lib/nlattr.c:222 [inline] nla_validate_int_range lib/nlattr.c:336 [inline] validate_nla lib/nlattr.c:575 [inline] ... The message in question matches this policy: [NFTA_TARGET_REV] = NLA_POLICY_MAX(NLA_BE32, 255), but because NLA_BE32 size in minlen array is 0, the validation code will read past the malformed (too small) attribute. Note: Other attributes, e.g. BITFIELD32, SINT, UINT.. are also missing: those likely should be added too.

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CVSS v3.1 Score

5.5

MEDIUM

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

Weakness Type (CWE)

CWE-908 CWE-908

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.1 — 6.1.81
linux	linux_kernel	6.2 — 6.6.21
linux	linux_kernel	6.7 — 6.7.9
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/0ac219c4c3ab253f3981f346903458d20bacab32 https://git.kernel.org/stable/c/7a9d14c63b35f89563c5ecbadf918ad64979712d https://git.kernel.org/stable/c/9a0d18853c280f6a0ee99f91619f2442a17a323a https://git.kernel.org/stable/c/a2ab028151841cd833cb53eb99427e0cc990112d https://git.kernel.org/stable/c/0ac219c4c3ab253f3981f346903458d20bacab32 https://git.kernel.org/stable/c/7a9d14c63b35f89563c5ecbadf918ad64979712d https://git.kernel.org/stable/c/9a0d18853c280f6a0ee99f91619f2442a17a323a https://git.kernel.org/stable/c/a2ab028151841cd833cb53eb99427e0cc990112d

Other References

https://git.kernel.org/stable/c/000a68159c0326b46c42ec712ab98793e7e625a7 https://git.kernel.org/stable/c/80b40f9cb87f3bf5877dfb852765cf92bc03ca77

Frequently Asked Questions

What is CVE-2024-26849? +

In the Linux kernel, the following vulnerability has been resolved: netlink: add nla be16/32 types to minlen array BUG: KMSAN: uninit-value in nla_validate_range_unsigned lib/nlattr.c:222 [inline] BUG: KMSAN: uninit-value in nla_validate_int_range lib/nlattr.c:336 [inline] BUG: KMSAN: uninit-value in validate_nla lib/nlattr.c:575 [inline] BUG: KMSAN: uninit-value in __nla_validate_parse+0x2e20/0x45c0 lib/nlattr.c:631 nla_validate_range_unsigned lib/nlattr.c:222 [inline] nla_validate_int_range lib/nlattr.c:336 [inline] validate_nla lib/nlattr.c:575 [inline] ... The message in question matches this policy: [NFTA_TARGET_REV] = NLA_POLICY_MAX(NLA_BE32, 255), but because NLA_BE32 size in minlen array is 0, the validation code will read past the malformed (too small) attribute. Note: Other attributes, e.g. BITFIELD32, SINT, UINT.. are also missing: those likely should be added too. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26849? +

CVE-2024-26849 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-26849? +

CVE-2024-26849 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-26849? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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