CVE-2024-53155: ocfs2: fix uninitialized value in ocfs2_file_read_iter()
First published: Tue Dec 24 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix uninitialized value in ocfs2_file_read_iter() Syzbot has reported the following KMSAN splat: BUG: KMSAN: uninit-value in ocfs2_file_read_iter+0x9a4/0xf80 ocfs2_file_read_iter+0x9a4/0xf80 __io_read+0x8d4/0x20f0 io_read+0x3e/0xf0 io_issue_sqe+0x42b/0x22c0 io_wq_submit_work+0xaf9/0xdc0 io_worker_handle_work+0xd13/0x2110 io_wq_worker+0x447/0x1410 ret_from_fork+0x6f/0x90 ret_from_fork_asm+0x1a/0x30 Uninit was created at: __alloc_pages_noprof+0x9a7/0xe00 alloc_pages_mpol_noprof+0x299/0x990 alloc_pages_noprof+0x1bf/0x1e0 allocate_slab+0x33a/0x1250 ___slab_alloc+0x12ef/0x35e0 kmem_cache_alloc_bulk_noprof+0x486/0x1330 __io_alloc_req_refill+0x84/0x560 io_submit_sqes+0x172f/0x2f30 __se_sys_io_uring_enter+0x406/0x41c0 __x64_sys_io_uring_enter+0x11f/0x1a0 x64_sys_call+0x2b54/0x3ba0 do_syscall_64+0xcd/0x1e0 entry_SYSCALL_64_after_hwframe+0x77/0x7f Since an instance of 'struct kiocb' may be passed from the block layer with 'private' field uninitialized, introduce 'ocfs2_iocb_init_rw_locked()' and use it from where 'ocfs2_dio_end_io()' might take care, i.e. in 'ocfs2_file_read_iter()' and 'ocfs2_file_write_iter()'.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=2.6.22<4.19.325 | |
| Linux Kernel | >=4.20<5.4.287 | |
| Linux Kernel | >=5.5<5.10.231 | |
| Linux Kernel | >=5.11<5.15.174 | |
| Linux Kernel | >=5.16<6.1.120 | |
| Linux Kernel | >=6.2<6.6.64 | |
| Linux Kernel | >=6.7<6.11.11 | |
| Linux Kernel | >=6.12<6.12.2 | |
| debian/linux | <=5.10.223-1 | 5.10.234-1 6.1.129-1 6.1.128-1 6.12.20-1 6.12.21-1 |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/6c8f8d1e595dabd5389817f6d798cc8bd95c40ab
- https://git.kernel.org/stable/c/f4078ef38d3163e6be47403a619558b19c4bfccd
- https://git.kernel.org/stable/c/66b7ddd1804e2c4216dd7ead8eeb746cdbb3b62f
- https://git.kernel.org/stable/c/8c966150d5abff58c3c2bdb9a6e63fd773782905
- https://git.kernel.org/stable/c/83f8713a0ef1d55d6a287bcfadcaab8245ac5098
- https://git.kernel.org/stable/c/8e0de82ed18ba0e71f817adbd81317fd1032ca5a
- https://git.kernel.org/stable/c/366c933c2ab34dd6551acc03b4872726b7605143
- https://git.kernel.org/stable/c/dc78efe556fed162d48736ef24066f42e463e27c
- https://git.kernel.org/stable/c/adc77b19f62d7e80f98400b2fca9d700d2afdd6f
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-53155
- https://nvd.nist.gov/vuln/detail/CVE-2024-53155
- https://launchpad.net/bugs/cve/CVE-2024-53155
- https://security-tracker.debian.org/tracker/CVE-2024-53155
- https://ubuntu.com/security/CVE-2024-53155
- https://git.kernel.org/linus/adc77b19f62d7e80f98400b2fca9d700d2afdd6f
Frequently Asked Questions
What is the severity of CVE-2024-53155?
CVE-2024-53155 is classified as a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2024-53155?
To fix CVE-2024-53155, update to the latest version of the Linux kernel that addresses this vulnerability.
Which versions of the Linux kernel are affected by CVE-2024-53155?
CVE-2024-53155 affects Linux kernel versions between 2.6.22 and 4.19.325, 4.20 and 5.4.287, 5.5 and 5.10.231, 5.11 and 5.15.174, 5.16 and 6.1.120, 6.2 and 6.6.64, 6.7 and 6.11.11, and 6.12 and 6.12.2.
What type of vulnerability is CVE-2024-53155?
CVE-2024-53155 is a use of uninitialized value vulnerability in the ocfs2 file system code of the Linux kernel.
What impact does CVE-2024-53155 have on systems?
The impact of CVE-2024-53155 may include potential data corruption or system instability due to uninitialized values being used during file read operations.
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