PT-2025-49711 · Linux · Linux Kernel
Published
2025-12-09
·
Updated
2026-02-24
·
CVE-2023-53820
None
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Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains a flaw within the loop device implementation. Specifically, a check is missing in the
loop set status from info() function before reassigning values to lo->lo offset and lo->lo sizelimit. This can lead to incorrect values being assigned if an overflow error occurs, and these incorrect values are subsequently used in operations like calculating the position (pos) within the do req filebacked function via loff t pos = ((loff t) blk rq pos(rq) << 9) + lo->lo offset; and in the lo rw aio function through cmd->iocb.ki pos = pos. The initial patch did not fully address the issue, as the incorrect value was still utilized by the loop driver despite an error return from the ioctl call.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
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Related Identifiers
Affected Products
Linux Kernel