| 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-2025-21918: usb: typec: ucsi: Fix NULL pointer access |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| usb: typec: ucsi: Fix NULL pointer access |
| |
| Resources should be released only after all threads that utilize them |
| have been destroyed. |
| This commit ensures that resources are not released prematurely by waiting |
| for the associated workqueue to complete before deallocating them. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21918 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.16 with commit b9aa02ca39a49740926c2c450a1505a4a0f8954a and fixed in 6.1.133 with commit 7a735a8a46f6ebf898bbefd96659ca5da798bce0 |
| Issue introduced in 5.16 with commit b9aa02ca39a49740926c2c450a1505a4a0f8954a and fixed in 6.6.83 with commit 46fba7be161bb89068958138ea64ec33c0b446d4 |
| Issue introduced in 5.16 with commit b9aa02ca39a49740926c2c450a1505a4a0f8954a and fixed in 6.12.19 with commit 079a3e52f3e751bb8f5937195bdf25c5d14fdff0 |
| Issue introduced in 5.16 with commit b9aa02ca39a49740926c2c450a1505a4a0f8954a and fixed in 6.13.7 with commit 592a0327d026a122e97e8e8bb7c60cbbe7697344 |
| Issue introduced in 5.16 with commit b9aa02ca39a49740926c2c450a1505a4a0f8954a and fixed in 6.14 with commit b13abcb7ddd8d38de769486db5bd917537b32ab1 |
| |
| 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-2025-21918 |
| 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: |
| drivers/usb/typec/ucsi/ucsi.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/7a735a8a46f6ebf898bbefd96659ca5da798bce0 |
| https://git.kernel.org/stable/c/46fba7be161bb89068958138ea64ec33c0b446d4 |
| https://git.kernel.org/stable/c/079a3e52f3e751bb8f5937195bdf25c5d14fdff0 |
| https://git.kernel.org/stable/c/592a0327d026a122e97e8e8bb7c60cbbe7697344 |
| https://git.kernel.org/stable/c/b13abcb7ddd8d38de769486db5bd917537b32ab1 |
