| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-37927: iommu/amd: Fix potential buffer overflow in parse_ivrs_acpihid |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| iommu/amd: Fix potential buffer overflow in parse_ivrs_acpihid |
| |
| There is a string parsing logic error which can lead to an overflow of hid |
| or uid buffers. Comparing ACPIID_LEN against a total string length doesn't |
| take into account the lengths of individual hid and uid buffers so the |
| check is insufficient in some cases. For example if the length of hid |
| string is 4 and the length of the uid string is 260, the length of str |
| will be equal to ACPIID_LEN + 1 but uid string will overflow uid buffer |
| which size is 256. |
| |
| The same applies to the hid string with length 13 and uid string with |
| length 250. |
| |
| Check the length of hid and uid strings separately to prevent |
| buffer overflow. |
| |
| Found by Linux Verification Center (linuxtesting.org) with SVACE. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37927 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.7 with commit ca3bf5d47cec8b7614bcb2e9132c40081d6d81db and fixed in 5.4.294 with commit 2b65060c84ee4d8dc64fae6d2728b528e9e832e1 |
| Issue introduced in 4.7 with commit ca3bf5d47cec8b7614bcb2e9132c40081d6d81db and fixed in 5.10.238 with commit a65ebfed65fa62797ec1f5f1dcf7adb157a2de1e |
| Issue introduced in 4.7 with commit ca3bf5d47cec8b7614bcb2e9132c40081d6d81db and fixed in 5.15.182 with commit 466d9da267079a8d3b69fa72dfa3a732e1f6dbb5 |
| Issue introduced in 4.7 with commit ca3bf5d47cec8b7614bcb2e9132c40081d6d81db and fixed in 6.1.138 with commit c3f37faa71f5d26dd2144b3f2b14525ec8f5e41f |
| Issue introduced in 4.7 with commit ca3bf5d47cec8b7614bcb2e9132c40081d6d81db and fixed in 6.6.90 with commit 13d67528e1ae4486e9ab24b70122fab104c73c29 |
| Issue introduced in 4.7 with commit ca3bf5d47cec8b7614bcb2e9132c40081d6d81db and fixed in 6.12.28 with commit 10d901a95f8e766e5aa0bb9a983fb41271f64718 |
| Issue introduced in 4.7 with commit ca3bf5d47cec8b7614bcb2e9132c40081d6d81db and fixed in 6.14.6 with commit c8bdfc0297965bb13fa439d36ca9c4f7c8447f0f |
| Issue introduced in 4.7 with commit ca3bf5d47cec8b7614bcb2e9132c40081d6d81db and fixed in 6.15 with commit 8dee308e4c01dea48fc104d37f92d5b58c50b96c |
| |
| 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-2025-37927 |
| 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/iommu/amd/init.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/2b65060c84ee4d8dc64fae6d2728b528e9e832e1 |
| https://git.kernel.org/stable/c/a65ebfed65fa62797ec1f5f1dcf7adb157a2de1e |
| https://git.kernel.org/stable/c/466d9da267079a8d3b69fa72dfa3a732e1f6dbb5 |
| https://git.kernel.org/stable/c/c3f37faa71f5d26dd2144b3f2b14525ec8f5e41f |
| https://git.kernel.org/stable/c/13d67528e1ae4486e9ab24b70122fab104c73c29 |
| https://git.kernel.org/stable/c/10d901a95f8e766e5aa0bb9a983fb41271f64718 |
| https://git.kernel.org/stable/c/c8bdfc0297965bb13fa439d36ca9c4f7c8447f0f |
| https://git.kernel.org/stable/c/8dee308e4c01dea48fc104d37f92d5b58c50b96c |
