CVE-2025-22005

ipv6: Fix memleak of nhc_pcpu_rth_output in fib_check_nh_v6_gw().

State: Published
Severity: 5.5 Medium
Published: Apr 3, 2025
Updated: Oct 15, 2026
Reserved: Dec 29, 2024

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.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-401 Missing Release of Memory after Effective Lifetime

Affected Products

Product	Versions
LinuxLinux	7dd73168e273938b9e9bb42ca51b0c27d807992b to before 16267a5036173d0173377545b4b6021b081d0933Affected 7dd73168e273938b9e9bb42ca51b0c27d807992b to before 1bd12dfc058e1e68759d313d7727d68dbc1b8964Affected 7dd73168e273938b9e9bb42ca51b0c27d807992b to before 596a883c4ce2d2e9c175f25b98fed3a1f33fea38Affected 7dd73168e273938b9e9bb42ca51b0c27d807992b to before 77c41cdbe6bce476e08d3251c0d501feaf10a9f3Affected 7dd73168e273938b9e9bb42ca51b0c27d807992b to before 119dcafe36795a15ae53351cbbd6177aaf94ffefAffected 7dd73168e273938b9e9bb42ca51b0c27d807992b to before 29d91820184d5cbc70f3246d4911d96eaeb930d6Affected 7dd73168e273938b9e9bb42ca51b0c27d807992b to before d3d5b4b5ae263c3225db363ba08b937e2e2b0380Affected 7dd73168e273938b9e9bb42ca51b0c27d807992b to before 9740890ee20e01f99ff1dde84c63dcf089fabb98Affected
LinuxLinux	5.3Affected before 5.3Not affected 5.4.292 through 5.4.Not affected 5.10.236 through 5.10.Not affected 5.15.180 through 5.15.Not affected 6.1.132 through 6.1.Not affected 6.6.85 through 6.6.Not affected 6.12.21 through 6.12.Not affected 6.13.9 through 6.13.*Not affected 6.14 and laterNot affected

Product

Versions

LinuxLinux

7dd73168e273938b9e9bb42ca51b0c27d807992b to before 16267a5036173d0173377545b4b6021b081d0933Affected
7dd73168e273938b9e9bb42ca51b0c27d807992b to before 1bd12dfc058e1e68759d313d7727d68dbc1b8964Affected
7dd73168e273938b9e9bb42ca51b0c27d807992b to before 596a883c4ce2d2e9c175f25b98fed3a1f33fea38Affected
7dd73168e273938b9e9bb42ca51b0c27d807992b to before 77c41cdbe6bce476e08d3251c0d501feaf10a9f3Affected
7dd73168e273938b9e9bb42ca51b0c27d807992b to before 119dcafe36795a15ae53351cbbd6177aaf94ffefAffected
7dd73168e273938b9e9bb42ca51b0c27d807992b to before 29d91820184d5cbc70f3246d4911d96eaeb930d6Affected
7dd73168e273938b9e9bb42ca51b0c27d807992b to before d3d5b4b5ae263c3225db363ba08b937e2e2b0380Affected
7dd73168e273938b9e9bb42ca51b0c27d807992b to before 9740890ee20e01f99ff1dde84c63dcf089fabb98Affected

LinuxLinux

5.3Affected
before 5.3Not affected
5.4.292 through 5.4.*Not affected
5.10.236 through 5.10.*Not affected
5.15.180 through 5.15.*Not affected
6.1.132 through 6.1.*Not affected
6.6.85 through 6.6.*Not affected
6.12.21 through 6.12.*Not affected
6.13.9 through 6.13.*Not affected
6.14 and laterNot affected

References

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