| From bippy-5f407fcff5a0 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-2025-21679: btrfs: add the missing error handling inside get_canonical_dev_path |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| btrfs: add the missing error handling inside get_canonical_dev_path |
| |
| Inside function get_canonical_dev_path(), we call d_path() to get the |
| final device path. |
| |
| But d_path() can return error, and in that case the next strscpy() call |
| will trigger an invalid memory access. |
| |
| Add back the missing error handling for d_path(). |
| |
| The Linux kernel CVE team has assigned CVE-2025-21679 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.12.5 with commit 5d261f60b5c82ba1e4b5555252e1c90c43d96015 and fixed in 6.12.11 with commit d0fb5741932b831eded49bfaaf33353e96200d6d |
| |
| 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-2025-21679 |
| 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: |
| fs/btrfs/volumes.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/d0fb5741932b831eded49bfaaf33353e96200d6d |
| https://git.kernel.org/stable/c/fe4de594f7a2e9bc49407de60fbd20809fad4192 |
