CVE-2023-54317High· 7.8▾ TwilightIn 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 vecto…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= c6cd92fcabd6cc78bb1808c6a18245c842722fc1 < b7f8892f672222dbfcc721f51edc03963212b249Linux >= d4c637af2e56ee1ec66ee34d0ac5a13c75911aec < 98e311be44dbe31ad9c42aa067b2359bac451fdaLinux >= a00f5276e26636cbf72f24f79831026d2e2868e7 < 3c4a56ef7c538d16c1738ba0ccea9e7146105b5aLinux >= a00f5276e26636cbf72f24f79831026d2e2868e7 < f2b478228bfdd11e358c5bc197561331f5d5c394Linux >= a00f5276e26636cbf72f24f79831026d2e2868e7 < ff60b2bb680ebcaf8890814dd51084a022891469Linux >= a00f5276e26636cbf72f24f79831026d2e2868e7 < be360c83f2d810493c04f999d69ec9152981e0c0Linux >= a00f5276e26636cbf72f24f79831026d2e2868e7 < 63d31617883d64b43b0e2d529f0751f40713ecaeLinux >= a00f5276e26636cbf72f24f79831026d2e2868e7 < f50714b57aecb6b3dc81d578e295f86d9c73f078Linux 1ed7c9f45fb893877ffa7cedd7aa61beaadbb328Linux >= 4.14.158 < 4.14.308Linux >= 4.19.88 < 4.19.276Linux >= 4.9.206 < 4.10Linux 5.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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