7.8

CVE-2023-54317: dm flakey: don't corrupt the zero page

Deferred
AliasesUBUNTU-CVE-2023-54317DEBIAN-CVE-2023-54317
Published 30-12-2025Last modified 15-10-2026

Vulnerability summary

CVE-2023-54317 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 5
RHSA-2023:6583RHSA-2023:7077SUSE-SU-2026:0263-1SUSE-SU-2026:0316-1SUSE-SU-2026:0317-1SUSE-SU-2026:0411-1

Timeline

  1. 30-12-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.15% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu121 products
  • linuxAll versions (No fix recorded) | < 5.4.0-152.169 | < 5.15.0-75.82
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1104.112 | < 5.15.0-1038.43
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.20-1
Linux1 product
  • linux≥ c6cd92fcabd6cc78bb1808c6a18245c842722fc1, < b7f8892f672222dbfcc721f51edc03963212b249 | ≥ d4c637af2e56ee1ec66ee34d0ac5a13c75911aec, < 98e311be44dbe31ad9c42aa067b2359bac451fda | ≥ a00f5276e26636cbf72f24f79831026d2e2868e7, < 3c4a56ef7c538d16c1738ba0ccea9e7146105b5a | ≥ a00f5276e26636cbf72f24f79831026d2e2868e7, < f2b478228bfdd11e358c5bc197561331f5d5c394 | ≥ a00f5276e26636cbf72f24f79831026d2e2868e7, < ff60b2bb680ebcaf8890814dd51084a022891469 | ≥ a00f5276e26636cbf72f24f79831026d2e2868e7, < be360c83f2d810493c04f999d69ec9152981e0c0 | ≥ a00f5276e26636cbf72f24f79831026d2e2868e7, < 63d31617883d64b43b0e2d529f0751f40713ecae | ≥ a00f5276e26636cbf72f24f79831026d2e2868e7, < f50714b57aecb6b3dc81d578e295f86d9c73f078 | 1ed7c9f45fb893877ffa7cedd7aa61beaadbb328 | ≥ 4.14.158, < 4.14.308 | ≥ 4.19.88, < 4.19.276 | ≥ 4.9.206, < 4.10 | 5.0

3 vendors · 123 products

References

12 links
Show all 12 references