vulnerability
Ubuntu: (CVE-2022-49747): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:N/I:N/A:C) | Mar 27, 2025 | Apr 1, 2025 | May 30, 2025 |
Description
In the Linux kernel, the following vulnerability has been resolved:
erofs/zmap.c: Fix incorrect offset calculation
Effective offset to add to length was being incorrectly calculated,
which resulted in iomap->length being set to 0, triggering a WARN_ON
in iomap_iter_done().
Fix that, and describe it in comments.
This was reported as a crash by syzbot under an issue about a warning
encountered in iomap_iter_done(), but unrelated to erofs.
C reproducer: https://syzkaller.appspot.com/text?tag=ReproC&x=1037a6b2880000
Kernel config: https://syzkaller.appspot.com/text?tag=KernelConfig&x=e2021a61197ebe02
Dashboard link: https://syzkaller.appspot.com/bug?extid=a8e049cd3abd342936b6
Solution(s)
References
- CVE-2022-49747
- https://attackerkb.com/topics/CVE-2022-49747
- URL-https://git.kernel.org/linus/6acd87d50998ef0afafc441613aeaf5a8f5c9eff
- URL-https://git.kernel.org/stable/c/2144859229c1e74f52d3ea067338d314a83a8afb
- URL-https://git.kernel.org/stable/c/6acd87d50998ef0afafc441613aeaf5a8f5c9eff
- URL-https://git.kernel.org/stable/c/9f31d8c889d9a4e47bfcc6c4537d0c9f89fe582c
- URL-https://www.cve.org/CVERecord?id=CVE-2022-49747
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