| 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-2025-21743: usbnet: ipheth: fix possible overflow in DPE length check |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| usbnet: ipheth: fix possible overflow in DPE length check |
| |
| Originally, it was possible for the DPE length check to overflow if |
| wDatagramIndex + wDatagramLength > U16_MAX. This could lead to an OoB |
| read. |
| |
| Move the wDatagramIndex term to the other side of the inequality. |
| |
| An existing condition ensures that wDatagramIndex < urb->actual_length. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21743 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.5 with commit a2d274c62e44b1995c170595db3865c6fe701226 and fixed in 6.6.78 with commit 18bf6f5cce3172cb303c3f0551aa9443d5ed74f8 |
| Issue introduced in 6.5 with commit a2d274c62e44b1995c170595db3865c6fe701226 and fixed in 6.12.14 with commit d677e7dd59ad6837496f5a02d8e5d39824278dfd |
| Issue introduced in 6.5 with commit a2d274c62e44b1995c170595db3865c6fe701226 and fixed in 6.13.3 with commit d824a964185910e317287f034c0a439c08b4fe49 |
| Issue introduced in 6.5 with commit a2d274c62e44b1995c170595db3865c6fe701226 and fixed in 6.14 with commit c219427ed296f94bb4b91d08626776dc7719ee27 |
| |
| 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-2025-21743 |
| 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/net/usb/ipheth.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/18bf6f5cce3172cb303c3f0551aa9443d5ed74f8 |
| https://git.kernel.org/stable/c/d677e7dd59ad6837496f5a02d8e5d39824278dfd |
| https://git.kernel.org/stable/c/d824a964185910e317287f034c0a439c08b4fe49 |
| https://git.kernel.org/stable/c/c219427ed296f94bb4b91d08626776dc7719ee27 |
