CVE-2024-26849

netlink: add nla be16/32 types to minlen array

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.05%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2024-26849?
CVE-2024-26849 has been scored as a medium severity vulnerability.
How to fix CVE-2024-26849?
To fix CVE-2024-26849, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-26849 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-26849 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-26849?
CVE-2024-26849 affects Linux Linux, Linux Linux.
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