Vulnerability 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.
References
- https://git.kernel.org/stable/c/3c4a56ef7c538d16c1738ba0ccea9e7146105b5a
- https://git.kernel.org/stable/c/63d31617883d64b43b0e2d529f0751f40713ecae
- https://git.kernel.org/stable/c/98e311be44dbe31ad9c42aa067b2359bac451fda
- https://git.kernel.org/stable/c/b7f8892f672222dbfcc721f51edc03963212b249
- https://git.kernel.org/stable/c/be360c83f2d810493c04f999d69ec9152981e0c0
- https://git.kernel.org/stable/c/f2b478228bfdd11e358c5bc197561331f5d5c394
- https://git.kernel.org/stable/c/f50714b57aecb6b3dc81d578e295f86d9c73f078
- https://git.kernel.org/stable/c/ff60b2bb680ebcaf8890814dd51084a022891469
FAQ
What is CVE-2023-54317?
CVE-2023-54317 is a documented vulnerability. 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 s...
How severe is CVE-2023-54317?
CVSS scoring is not yet available for CVE-2023-54317. Check NVD for updates.
Is there a patch for CVE-2023-54317?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.