CVE-2025-22005
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.
Does this matter?
Lower severity and a low EPSS score (0.21%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.21% probability · 12th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-401
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/119dcafe36795a15ae53351cbbd6177aaf94ffefPatch
- https://git.kernel.org/stable/c/16267a5036173d0173377545b4b6021b081d0933Patch
- https://git.kernel.org/stable/c/1bd12dfc058e1e68759d313d7727d68dbc1b8964Patch
- https://git.kernel.org/stable/c/29d91820184d5cbc70f3246d4911d96eaeb930d6Patch
- https://git.kernel.org/stable/c/596a883c4ce2d2e9c175f25b98fed3a1f33fea38Patch
- https://git.kernel.org/stable/c/77c41cdbe6bce476e08d3251c0d501feaf10a9f3Patch
- https://git.kernel.org/stable/c/9740890ee20e01f99ff1dde84c63dcf089fabb98Patch
- https://git.kernel.org/stable/c/d3d5b4b5ae263c3225db363ba08b937e2e2b0380Patch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.