| 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-2025-21772: partitions: mac: fix handling of bogus partition table |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| partitions: mac: fix handling of bogus partition table |
| |
| Fix several issues in partition probing: |
| |
| - The bailout for a bad partoffset must use put_dev_sector(), since the |
| preceding read_part_sector() succeeded. |
| - If the partition table claims a silly sector size like 0xfff bytes |
| (which results in partition table entries straddling sector boundaries), |
| bail out instead of accessing out-of-bounds memory. |
| - We must not assume that the partition table contains proper NUL |
| termination - use strnlen() and strncmp() instead of strlen() and |
| strcmp(). |
| |
| The Linux kernel CVE team has assigned CVE-2025-21772 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.4.291 with commit a3e77da9f843e4ab93917d30c314f0283e28c124 |
| Fixed in 5.10.235 with commit 213ba5bd81b7e97ac6e6190b8f3bc6ba76123625 |
| Fixed in 5.15.179 with commit 40a35d14f3c0dc72b689061ec72fc9b193f37d1f |
| Fixed in 6.1.129 with commit 27a39d006f85e869be68c1d5d2ce05e5d6445bf5 |
| Fixed in 6.6.79 with commit 92527100be38ede924768f4277450dfe8a40e16b |
| Fixed in 6.12.16 with commit 6578717ebca91678131d2b1f4ba4258e60536e9f |
| Fixed in 6.13.4 with commit 7fa9706722882f634090bfc9af642bf9ed719e27 |
| Fixed in 6.14 with commit 80e648042e512d5a767da251d44132553fe04ae0 |
| |
| 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-2025-21772 |
| 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: |
| block/partitions/mac.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/a3e77da9f843e4ab93917d30c314f0283e28c124 |
| https://git.kernel.org/stable/c/213ba5bd81b7e97ac6e6190b8f3bc6ba76123625 |
| https://git.kernel.org/stable/c/40a35d14f3c0dc72b689061ec72fc9b193f37d1f |
| https://git.kernel.org/stable/c/27a39d006f85e869be68c1d5d2ce05e5d6445bf5 |
| https://git.kernel.org/stable/c/92527100be38ede924768f4277450dfe8a40e16b |
| https://git.kernel.org/stable/c/6578717ebca91678131d2b1f4ba4258e60536e9f |
| https://git.kernel.org/stable/c/7fa9706722882f634090bfc9af642bf9ed719e27 |
| https://git.kernel.org/stable/c/80e648042e512d5a767da251d44132553fe04ae0 |
