CVE-2023-53832: md/raid10: fix null-ptr-deref in raid10_sync_request

Deferred
AliasesUBUNTU-CVE-2023-53832DEBIAN-CVE-2023-53832
Published 09-12-2025Last modified 11-05-2026

Vulnerability summary

CVE-2023-53832 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17.4% of scored vulnerabilities.

Priority
Insufficient evidence

No CVSS vector published; no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.26%
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 8 · Related 5
RHSA-2023:6583RHSA-2023:7077RHSA-2023:7539SUSE-SU-2026:0263-1SUSE-SU-2026:0316-1SUSE-SU-2026:0317-1

Timeline

  1. 09-12-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: md/raid10: fix null-ptr-deref in raid10_sync_request init_resync() inits mempool and sets conf->have_replacemnt at the beginning of sync, close_sync() frees the mempool when sync is completed. After [1] recovery might be skipped and init_resync() is called but close_sync() is not. null-ptr-deref occurs with r10bio->dev[i].repl_bio. The following is one way to reproduce the issue. 1) create a array, wait for resync to complete, mddev->recovery_cp is set to MaxSector. 2) recovery is woken and it is skipped. conf->have_replacement is set to 0 in init_resync(). close_sync() not called. 3) some io errors and rdev A is set to WantReplacement. 4) a new device is added and set to A's replacement. 5) recovery is woken, A have replacement, but conf->have_replacemnt is 0. r10bio->dev[i].repl_bio will not be alloced and null-ptr-deref occurs. Fix it by not calling init_resync() if recovery skipped. [1] commit 7e83ccbecd60 ("md/raid10: Allow skipping recovery when clean arrays are assembled")

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.26% 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: not stated in public data.

Ubuntu124 products
  • linuxAll versions (No fix recorded) | < 5.4.0-162.179 | < 5.15.0-79.86
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1109.118 | < 5.15.0-1042.47
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.37-1 | < 6.3.7-1
Linux1 product
  • linux≥ 7e83ccbecd608b971f340e951c9e84cd0343002f, < 38d33593260536840b49fd1dcac9aedfd14a9d42 | ≥ 7e83ccbecd608b971f340e951c9e84cd0343002f, < 14964127be77884003976a392c9faa9ebaabbbe1 | ≥ 7e83ccbecd608b971f340e951c9e84cd0343002f, < bdbf104b1c91fbf38f82c522ebf75429f094292a | ≥ 7e83ccbecd608b971f340e951c9e84cd0343002f, < 68695084077e3de9d3e94e09238ace2b6f246446 | ≥ 7e83ccbecd608b971f340e951c9e84cd0343002f, < b50fd1c3d9d0175aa29ff2706ef36cc178bc356a | ≥ 7e83ccbecd608b971f340e951c9e84cd0343002f, < 99b503e4edc5938885d839cf0e7571963f75d800 | ≥ 7e83ccbecd608b971f340e951c9e84cd0343002f, < 9e9efc77efd1956cc244af975240f2513d78a371 | ≥ 7e83ccbecd608b971f340e951c9e84cd0343002f, < a405c6f0229526160aa3f177f65e20c86fce84c5 | 3.10

3 vendors · 126 products

References

12 links
Show all 12 references