CVE-2023-52741

Kernel memory corruption via CIFS reconnect race

Published May 21, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel CIFS client allows local users to trigger kernel memory misuse while reading over an unstable network. A reconnect callback can queue completion work that releases rdata before readpages_fill_pages or uncache_fill_pages returns and dereferences it. Reachability requires a local CIFS read concurrent with network disruption; the published record demonstrates KASAN detection but does not establish a reliable exploit consequence.

CVSS severity7.8
High
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel CIFS client allows local users to trigger kernel memory misuse while reading over an unstable network. A reconnect callback can queue completion work that releases rdata before readpages_fill_pages or uncache_fill_pages returns and dereferences it. Reachability requires a local CIFS read concurrent with network disruption; the published record demonstrates KASAN detection but does not establish a reliable exploit consequence.

The record

CVE
CVE-2023-52741
Published
May 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.17
  2. Affected versionversion=b3160aebb49b5e07f6bc3b8c5bed6013ca9e422e <2b693fe3f760c87fd9768e759f6297f743a1b3b0
  3. Affected versionversion=b3160aebb49b5e07f6bc3b8c5bed6013ca9e422e <3684a2f6affa1ca52a5d4a12f04d0652efdee65e
  4. Affected versionversion=b3160aebb49b5e07f6bc3b8c5bed6013ca9e422e <aa5465aeca3c66fecdf7efcf554aed79b4c4b211
  5. Affected versionversion=b3160aebb49b5e07f6bc3b8c5bed6013ca9e422e <d1fba1e096ffc7ec11df863a97c50203c47315b9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.17; version=b3160aebb49b5e07f6bc3b8c5bed6013ca9e422e <2b693fe3f760c87fd9768e759f6297f743a1b3b0; version=b3160aebb49b5e07f6bc3b8c5bed6013ca9e422e <3684a2f6affa1ca52a5d4a12f04d0652efdee65e; version=b3160aebb49b5e07f6bc3b8c5bed6013ca9e422e <aa5465aeca3c66fecdf7efcf554aed79b4c4b211; version=b3160aebb49b5e07f6bc3b8c5bed6013ca9e422e <d1fba1e096ffc7ec11df863a97c50203c47315b9

Published CVSS scores

7.8Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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