dm flakey: don't corrupt the zero page (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.15 % · percentile 5 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Deferred
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/b7f8892f672222dbfcc721f51edc03963212b249
- https://git.kernel.org/stable/c/98e311be44dbe31ad9c42aa067b2359bac451fda
- https://git.kernel.org/stable/c/3c4a56ef7c538d16c1738ba0ccea9e7146105b5a
- https://git.kernel.org/stable/c/f2b478228bfdd11e358c5bc197561331f5d5c394
- https://git.kernel.org/stable/c/ff60b2bb680ebcaf8890814dd51084a022891469
- https://git.kernel.org/stable/c/be360c83f2d810493c04f999d69ec9152981e0c0
- https://git.kernel.org/stable/c/63d31617883d64b43b0e2d529f0751f40713ecae
- https://git.kernel.org/stable/c/f50714b57aecb6b3dc81d578e295f86d9c73f078
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2023-60487
- GCVE · GCVE-0-2023-54317
CERT-FR advisories
- CERTFR-2026-AVI-0225 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0170 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0108 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected c6cd92fcabd6cc78bb1808c6a18245c842722fc1 < b7f8892f672222dbfcc721f51edc03963212b249 ; affected d4c637af2e56ee1ec66ee34d0ac5a13c75911aec < 98e311be44dbe31ad9c42aa067b2359bac451fda ; affected a00f5276e26636cbf72f24f79831026d2e2868e7 < 3c4a56ef7c538d16c1738ba0ccea9e7146105b5a ; affected a00f5276e26636cbf72f24f79831026d2e2868e7 < f2b478228bfdd11e358c5bc197561331f5d5c394 ; affected a00f5276e26636cbf72f24f79831026d2e2868e7 < ff60b2bb680ebcaf8890814dd51084a022891469 ; affected a00f5276e26636cbf72f24f79831026d2e2868e7 < be360c83f2d810493c04f999d69ec9152981e0c0 |
| Linux · Linux | affected 5.0 ; unaffected 0 < 5.0 ; unaffected 4.14.308 ≤ 4.14.* ; unaffected 4.19.276 ≤ 4.19.* ; unaffected 5.4.235 ≤ 5.4.* ; unaffected 5.10.173 ≤ 5.10.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |