| 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-2025-21962: cifs: Fix integer overflow while processing closetimeo mount option |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| cifs: Fix integer overflow while processing closetimeo mount option |
| |
| User-provided mount parameter closetimeo of type u32 is intended to have |
| an upper limit, but before it is validated, the value is converted from |
| seconds to jiffies which can lead to an integer overflow. |
| |
| Found by Linux Verification Center (linuxtesting.org) with SVACE. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21962 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15.107 with commit 1d9cad9c5873097ea141ffc5da1e7921ce765aa8 and fixed in 5.15.180 with commit 513f6cf2e906a504b7ab0b62b2eea993a6f64558 |
| Issue introduced in 6.0 with commit 5efdd9122eff772eae2feae9f0fc0ec02d4846a3 and fixed in 6.1.132 with commit 9968fcf02cf6b0f78fbacf3f63e782162603855a |
| Issue introduced in 6.0 with commit 5efdd9122eff772eae2feae9f0fc0ec02d4846a3 and fixed in 6.6.84 with commit 6c13fcb7cf59ae65940da1dfea80144e42921e53 |
| Issue introduced in 6.0 with commit 5efdd9122eff772eae2feae9f0fc0ec02d4846a3 and fixed in 6.12.20 with commit 1c46673be93dd2954f44fe370fb4f2b8e6214224 |
| Issue introduced in 6.0 with commit 5efdd9122eff772eae2feae9f0fc0ec02d4846a3 and fixed in 6.13.8 with commit b24edd5c191c2689c59d0509f0903f9487eb6317 |
| Issue introduced in 6.0 with commit 5efdd9122eff772eae2feae9f0fc0ec02d4846a3 and fixed in 6.14 with commit d5a30fddfe2f2e540f6c43b59cf701809995faef |
| |
| 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-2025-21962 |
| 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/smb/client/fs_context.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/513f6cf2e906a504b7ab0b62b2eea993a6f64558 |
| https://git.kernel.org/stable/c/9968fcf02cf6b0f78fbacf3f63e782162603855a |
| https://git.kernel.org/stable/c/6c13fcb7cf59ae65940da1dfea80144e42921e53 |
| https://git.kernel.org/stable/c/1c46673be93dd2954f44fe370fb4f2b8e6214224 |
| https://git.kernel.org/stable/c/b24edd5c191c2689c59d0509f0903f9487eb6317 |
| https://git.kernel.org/stable/c/d5a30fddfe2f2e540f6c43b59cf701809995faef |
