| 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-2024-49900: jfs: Fix uninit-value access of new_ea in ea_buffer |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| jfs: Fix uninit-value access of new_ea in ea_buffer |
| |
| syzbot reports that lzo1x_1_do_compress is using uninit-value: |
| |
| ===================================================== |
| BUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x19f9/0x2510 lib/lzo/lzo1x_compress.c:178 |
| |
| ... |
| |
| Uninit was stored to memory at: |
| ea_put fs/jfs/xattr.c:639 [inline] |
| |
| ... |
| |
| Local variable ea_buf created at: |
| __jfs_setxattr+0x5d/0x1ae0 fs/jfs/xattr.c:662 |
| __jfs_xattr_set+0xe6/0x1f0 fs/jfs/xattr.c:934 |
| |
| ===================================================== |
| |
| The reason is ea_buf->new_ea is not initialized properly. |
| |
| Fix this by using memset to empty its content at the beginning |
| in ea_get(). |
| |
| The Linux kernel CVE team has assigned CVE-2024-49900 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.19.323 with commit 7b24d41d47a6805c45378debf8bd115675d41da8 |
| Fixed in 5.4.285 with commit dac398ed272a378d2f42ac68ae408333a51baf52 |
| Fixed in 5.10.227 with commit 8b1dcf25c26d42e4a68c4725ce52a0543c7878cc |
| Fixed in 5.15.168 with commit d7444f91a9f93eaa48827087ed0f3381c194181d |
| Fixed in 6.1.113 with commit 6041536d18c5f51a84bc37cd568cbab61870031e |
| Fixed in 6.6.55 with commit c076b3746224982eebdba5c9e4b1467e146c0d64 |
| Fixed in 6.10.14 with commit 7c244d5b48284a770d96ff703df2dfeadf804a73 |
| Fixed in 6.11.3 with commit 8ad8b531de79c348bcb8133e7f5e827b884226af |
| Fixed in 6.12 with commit 2b59ffad47db1c46af25ccad157bb3b25147c35c |
| |
| 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-2024-49900 |
| 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: |
| fs/jfs/xattr.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/7b24d41d47a6805c45378debf8bd115675d41da8 |
| https://git.kernel.org/stable/c/dac398ed272a378d2f42ac68ae408333a51baf52 |
| https://git.kernel.org/stable/c/8b1dcf25c26d42e4a68c4725ce52a0543c7878cc |
| https://git.kernel.org/stable/c/d7444f91a9f93eaa48827087ed0f3381c194181d |
| https://git.kernel.org/stable/c/6041536d18c5f51a84bc37cd568cbab61870031e |
| https://git.kernel.org/stable/c/c076b3746224982eebdba5c9e4b1467e146c0d64 |
| https://git.kernel.org/stable/c/7c244d5b48284a770d96ff703df2dfeadf804a73 |
| https://git.kernel.org/stable/c/8ad8b531de79c348bcb8133e7f5e827b884226af |
| https://git.kernel.org/stable/c/2b59ffad47db1c46af25ccad157bb3b25147c35c |
