Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix memleak of nhc_pcpu_rth_output in fib_check_nh_v6_gw(). fib_check_nh_v6_gw() expects that fib6_nh_init() cleans up everything when it fails. Commit 7dd73168e273 ("ipv6: Always allocate pcpu memory in a fib6_nh") moved fib_nh_common_init() before alloc_percpu_gfp() within fib6_nh_init() but forgot to add cleanup for fib6_nh->nh_common.nhc_pcpu_rth_output in case it fails to allocate fib6_nh->rt6i_pcpu, resulting in memleak. Let's call fib_nh_common_release() and clear nhc_pcpu_rth_output in the error path. Note that we can remove the fib6_nh_release() call in nh_create_ipv6() later in net-next.git.
Affected products
linux: linux kernel
References10
- git.kernel.org/stable/c/119dcafe36795a15ae53351cbbd6177aaf94ffef Patch
- git.kernel.org/stable/c/16267a5036173d0173377545b4b6021b081d0933 Patch
- git.kernel.org/stable/c/1bd12dfc058e1e68759d313d7727d68dbc1b8964 Patch
- git.kernel.org/stable/c/29d91820184d5cbc70f3246d4911d96eaeb930d6 Patch
- git.kernel.org/stable/c/596a883c4ce2d2e9c175f25b98fed3a1f33fea38 Patch
- git.kernel.org/stable/c/77c41cdbe6bce476e08d3251c0d501feaf10a9f3 Patch
- git.kernel.org/stable/c/9740890ee20e01f99ff1dde84c63dcf089fabb98 Patch
- git.kernel.org/stable/c/d3d5b4b5ae263c3225db363ba08b937e2e2b0380 Patch
- lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 12 · as of 7 November 2026
- CWE
- CWE-401
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