CVE-2023-54317

Published Dec 30, 2025

Last updated 2 months ago

C++

Overview

Description
In the Linux kernel, the following vulnerability has been resolved: dm flakey: don't corrupt the zero page When we need to zero some range on a block device, the function __blkdev_issue_zero_pages submits a write bio with the bio vector pointing to the zero page. If we use dm-flakey with corrupt bio writes option, it will corrupt the content of the zero page which results in crashes of various userspace programs. Glibc assumes that memory returned by mmap is zeroed and it uses it for calloc implementation; if the newly mapped memory is not zeroed, calloc will return non-zeroed memory. Fix this bug by testing if the page is equal to ZERO_PAGE(0) and avoiding the corruption in this case.
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD status
Deferred

Social media

Hype score
Not currently trending

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References

Sources include official advisories and independent security research.