CVE-2022-49747

erofs/zmap.c: Fix incorrect offset calculation

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

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/2144859229c1e74f52d3ea067338d314a83a8afb
https://git.kernel.org/stable/c/9f31d8c889d9a4e47bfcc6c4537d0c9f89fe582c
https://git.kernel.org/stable/c/6acd87d50998ef0afafc441613aeaf5a8f5c9eff

Frequently Asked Questions

What is the severity of CVE-2022-49747?: CVE-2022-49747 has not yet been assigned a CVSS score.
How to fix CVE-2022-49747?: To fix CVE-2022-49747, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49747 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49747 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49747?: CVE-2022-49747 affects Linux Linux, Linux Linux.

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