| From bippy-1.1.0 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-2024-50272: filemap: Fix bounds checking in filemap_read() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| filemap: Fix bounds checking in filemap_read() |
| |
| If the caller supplies an iocb->ki_pos value that is close to the |
| filesystem upper limit, and an iterator with a count that causes us to |
| overflow that limit, then filemap_read() enters an infinite loop. |
| |
| This behaviour was discovered when testing xfstests generic/525 with the |
| "localio" optimisation for loopback NFS mounts. |
| |
| The Linux kernel CVE team has assigned CVE-2024-50272 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.9 with commit c2a9737f45e27d8263ff9643f994bda9bac0b944 and fixed in 5.15.181 with commit 6cc52df69e8464811f9f6fc12f7aaa78451eb0b8 |
| Issue introduced in 4.9 with commit c2a9737f45e27d8263ff9643f994bda9bac0b944 and fixed in 6.1.117 with commit 26530b757c81f1389fb33ae0357500150933161b |
| Issue introduced in 4.9 with commit c2a9737f45e27d8263ff9643f994bda9bac0b944 and fixed in 6.6.61 with commit a2746ab3bbc9c6408da5cd072653ec8c24749235 |
| Issue introduced in 4.9 with commit c2a9737f45e27d8263ff9643f994bda9bac0b944 and fixed in 6.11.8 with commit 6450e73f4c86d481ac2e22e1bc848d346e140826 |
| Issue introduced in 4.9 with commit c2a9737f45e27d8263ff9643f994bda9bac0b944 and fixed in 6.12 with commit ace149e0830c380ddfce7e466fe860ca502fe4ee |
| Issue introduced in 3.16.40 with commit 272830350bb1bb5bb39395966ea63b9864b135d1 |
| Issue introduced in 4.7.10 with commit fbc7b803831e5c8a42c1f3427a17e55a814d6b3c |
| Issue introduced in 4.8.4 with commit 3d549dcfbbb0ecdaa571431a27ee5da9f2466716 |
| |
| 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-2024-50272 |
| 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: |
| mm/filemap.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/6cc52df69e8464811f9f6fc12f7aaa78451eb0b8 |
| https://git.kernel.org/stable/c/26530b757c81f1389fb33ae0357500150933161b |
| https://git.kernel.org/stable/c/a2746ab3bbc9c6408da5cd072653ec8c24749235 |
| https://git.kernel.org/stable/c/6450e73f4c86d481ac2e22e1bc848d346e140826 |
| https://git.kernel.org/stable/c/ace149e0830c380ddfce7e466fe860ca502fe4ee |
