CVE-2023-53746: s390/vfio-ap: fix memory leak in vfio_ap device driver

Deferred
AliasesUBUNTU-CVE-2023-53746DEBIAN-CVE-2023-53746
Published 08-12-2025Last modified 11-05-2026

Vulnerability summary

CVE-2023-53746 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.8% 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
0.19%
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-2024:3138SUSE-SU-2026:0263-1SUSE-SU-2026:0316-1SUSE-SU-2026:0317-1SUSE-SU-2026:0411-1

Timeline

  1. 08-12-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: s390/vfio-ap: fix memory leak in vfio_ap device driver The device release callback function invoked to release the matrix device uses the dev_get_drvdata(device *dev) function to retrieve the pointer to the vfio_matrix_dev object in order to free its storage. The problem is, this object is not stored as drvdata with the device; since the kfree function will accept a NULL pointer, the memory for the vfio_matrix_dev object is never freed. Since the device being released is contained within the vfio_matrix_dev object, the container_of macro will be used to retrieve its pointer.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.19% 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.

Ubuntu123 products
  • linuxAll versions (No fix recorded) | < 5.4.0-156.173 | < 5.15.0-79.86
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1107.115 | < 5.15.0-1042.47
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.25-1
Linux1 product
  • linux≥ 1fde573413b549d52183382e639c1d6ce88f5959, < 5195de1d5f66b276683240a896783f7f43c4f664 | ≥ 1fde573413b549d52183382e639c1d6ce88f5959, < ee17dea3072dec0bc34399a32fa884e26342e4ea | ≥ 1fde573413b549d52183382e639c1d6ce88f5959, < aa2bff25e9bb10c935c7ffe3d5f5975bdccb1749 | ≥ 1fde573413b549d52183382e639c1d6ce88f5959, < 6a40fda14b4be3e38f03cc42ffd4efbc64fb3e67 | ≥ 1fde573413b549d52183382e639c1d6ce88f5959, < 7b6a02f5bf15931464c79dfd487c57f76aae3496 | ≥ 1fde573413b549d52183382e639c1d6ce88f5959, < 8f8cf767589f2131ae5d40f3758429095c701c84 | 4.20

3 vendors · 125 products

References

10 links