| 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-2025-21914: slimbus: messaging: Free transaction ID in delayed interrupt scenario |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| slimbus: messaging: Free transaction ID in delayed interrupt scenario |
| |
| In case of interrupt delay for any reason, slim_do_transfer() |
| returns timeout error but the transaction ID (TID) is not freed. |
| This results into invalid memory access inside |
| qcom_slim_ngd_rx_msgq_cb() due to invalid TID. |
| |
| Fix the issue by freeing the TID in slim_do_transfer() before |
| returning timeout error to avoid invalid memory access. |
| |
| Call trace: |
| __memcpy_fromio+0x20/0x190 |
| qcom_slim_ngd_rx_msgq_cb+0x130/0x290 [slim_qcom_ngd_ctrl] |
| vchan_complete+0x2a0/0x4a0 |
| tasklet_action_common+0x274/0x700 |
| tasklet_action+0x28/0x3c |
| _stext+0x188/0x620 |
| run_ksoftirqd+0x34/0x74 |
| smpboot_thread_fn+0x1d8/0x464 |
| kthread+0x178/0x238 |
| ret_from_fork+0x10/0x20 |
| Code: aa0003e8 91000429 f100044a 3940002b (3800150b) |
| ---[ end trace 0fe00bec2b975c99 ]--- |
| Kernel panic - not syncing: Oops: Fatal exception in interrupt. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21914 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.16 with commit afbdcc7c384b0d446da08b1e0901dc176b41b9e0 and fixed in 5.4.291 with commit cec8c0ac173fe5321f03fdb1a09a9cb69bc9a9fe |
| Issue introduced in 4.16 with commit afbdcc7c384b0d446da08b1e0901dc176b41b9e0 and fixed in 5.10.235 with commit a32e5198a9134772eb03f7b72a7849094c55bda9 |
| Issue introduced in 4.16 with commit afbdcc7c384b0d446da08b1e0901dc176b41b9e0 and fixed in 5.15.179 with commit 09d34c4cbc38485c7514069f25348e439555b282 |
| Issue introduced in 4.16 with commit afbdcc7c384b0d446da08b1e0901dc176b41b9e0 and fixed in 6.1.131 with commit 18ae4cee05c310c299ba75d7477dcf34be67aa16 |
| Issue introduced in 4.16 with commit afbdcc7c384b0d446da08b1e0901dc176b41b9e0 and fixed in 6.6.83 with commit faac8e894014e8167471a8e4a5eb35a8fefbb82a |
| Issue introduced in 4.16 with commit afbdcc7c384b0d446da08b1e0901dc176b41b9e0 and fixed in 6.12.19 with commit 6abf3d8bb51cbaf886c3f08109a0462890b10db6 |
| Issue introduced in 4.16 with commit afbdcc7c384b0d446da08b1e0901dc176b41b9e0 and fixed in 6.13.7 with commit 0c541c8f6da23e0b92f0a6216d899659a7572074 |
| Issue introduced in 4.16 with commit afbdcc7c384b0d446da08b1e0901dc176b41b9e0 and fixed in 6.14 with commit dcb0d43ba8eb9517e70b1a0e4b0ae0ab657a0e5a |
| |
| 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-2025-21914 |
| 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/slimbus/messaging.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/cec8c0ac173fe5321f03fdb1a09a9cb69bc9a9fe |
| https://git.kernel.org/stable/c/a32e5198a9134772eb03f7b72a7849094c55bda9 |
| https://git.kernel.org/stable/c/09d34c4cbc38485c7514069f25348e439555b282 |
| https://git.kernel.org/stable/c/18ae4cee05c310c299ba75d7477dcf34be67aa16 |
| https://git.kernel.org/stable/c/faac8e894014e8167471a8e4a5eb35a8fefbb82a |
| https://git.kernel.org/stable/c/6abf3d8bb51cbaf886c3f08109a0462890b10db6 |
| https://git.kernel.org/stable/c/0c541c8f6da23e0b92f0a6216d899659a7572074 |
| https://git.kernel.org/stable/c/dcb0d43ba8eb9517e70b1a0e4b0ae0ab657a0e5a |
