| From bippy-7c5fe7eed585 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-22005: ipv6: Fix memleak of nhc_pcpu_rth_output in fib_check_nh_v6_gw(). |
| |
| 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. |
| |
| The Linux kernel CVE team has assigned CVE-2025-22005 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.3 with commit 7dd73168e273938b9e9bb42ca51b0c27d807992b and fixed in 5.4.292 with commit 16267a5036173d0173377545b4b6021b081d0933 |
| Issue introduced in 5.3 with commit 7dd73168e273938b9e9bb42ca51b0c27d807992b and fixed in 5.10.236 with commit 1bd12dfc058e1e68759d313d7727d68dbc1b8964 |
| Issue introduced in 5.3 with commit 7dd73168e273938b9e9bb42ca51b0c27d807992b and fixed in 5.15.180 with commit 596a883c4ce2d2e9c175f25b98fed3a1f33fea38 |
| Issue introduced in 5.3 with commit 7dd73168e273938b9e9bb42ca51b0c27d807992b and fixed in 6.1.132 with commit 77c41cdbe6bce476e08d3251c0d501feaf10a9f3 |
| Issue introduced in 5.3 with commit 7dd73168e273938b9e9bb42ca51b0c27d807992b and fixed in 6.6.85 with commit 119dcafe36795a15ae53351cbbd6177aaf94ffef |
| Issue introduced in 5.3 with commit 7dd73168e273938b9e9bb42ca51b0c27d807992b and fixed in 6.12.21 with commit 29d91820184d5cbc70f3246d4911d96eaeb930d6 |
| Issue introduced in 5.3 with commit 7dd73168e273938b9e9bb42ca51b0c27d807992b and fixed in 6.13.9 with commit d3d5b4b5ae263c3225db363ba08b937e2e2b0380 |
| Issue introduced in 5.3 with commit 7dd73168e273938b9e9bb42ca51b0c27d807992b and fixed in 6.14 with commit 9740890ee20e01f99ff1dde84c63dcf089fabb98 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2025-22005 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/ipv6/route.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/16267a5036173d0173377545b4b6021b081d0933 |
| https://git.kernel.org/stable/c/1bd12dfc058e1e68759d313d7727d68dbc1b8964 |
| https://git.kernel.org/stable/c/596a883c4ce2d2e9c175f25b98fed3a1f33fea38 |
| https://git.kernel.org/stable/c/77c41cdbe6bce476e08d3251c0d501feaf10a9f3 |
| https://git.kernel.org/stable/c/119dcafe36795a15ae53351cbbd6177aaf94ffef |
| https://git.kernel.org/stable/c/29d91820184d5cbc70f3246d4911d96eaeb930d6 |
| https://git.kernel.org/stable/c/d3d5b4b5ae263c3225db363ba08b937e2e2b0380 |
| https://git.kernel.org/stable/c/9740890ee20e01f99ff1dde84c63dcf089fabb98 |
