CVE-2019-25160: netlabel: fix out-of-bounds memory accesses

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-02-26 · updated 2026-08-04
Weakness: CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: netlabel: fix out-of-bounds memory accesses There are two array out-of-bounds memory accesses, one in cipso_v4_map_lvl_valid(), the other in netlbl_bitmap_walk(). Both errors are embarassingly simple, and the fixes are straightforward. As a FYI for anyone backporting this patch to kernels prior to v4.8, you'll want to apply the netlbl_bitmap_walk() patch to cipso_v4_bitmap_walk() as netlbl_bitmap_walk() doesn't exist before Linux v4.8.

Affected products

Linux kernel: from 2.6.19 before 3.16.66; from 3.17.0 before 3.18.137; from 3.19.0 before 4.4.177; from 4.5.0 before 4.9.163; from 4.10.0 before 4.14.106; from 4.15.0 before 4.19.28 — fixed in 3.16.66, 3.18.137, 4.14.106, 4.19.28, 4.20.15, 4.4.177

How to fix

Upgrade to a fixed version: Linux kernel 3.16.66, 3.18.137, 4.14.106, 4.19.28. Check the vendor advisory for mitigations.

References

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