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Review reviewHigh

CVE-2023-53629

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: fs: dlm: fix use after free in midcomms commit While working on processing dlm message in softirq context I experienced the following KASAN use-after-free warning: [ 151.760477] ================================================================== [ 151.761803] BUG: KASAN: use-after-free in dlm_midcomms_commit_mhandle+0x19d/0x4b0 [ 151.763414] Read of size 4 at addr ffff88811a980c60 by task lock_torture/1347 [ 151.765284] CPU: 7 PID: 1347 Comm: lock_torture Not tainted 6.1.0-rc4+ #2828 [ 151.766778] Hardware name: Red Hat KVM/...

CVSS
7.8
EPSS
0.45%
37.2% percentile
CISA KEV
Not listed
Published
2025.10.08
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.45%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: fs: dlm: fix use after free in midcomms commit While working on processing dlm message in softirq context I experienced the following KASAN use-after-free warning: [ 151.760477] ================================================================== [ 151.761803] BUG: KASAN: use-after-free in dlm_midcomms_commit_mhandle+0x19d/0x4b0 [ 151.763414] Read of size 4 at addr ffff88811a980c60 by task lock_torture/1347 [ 151.765284] CPU: 7 PID: 1347 Comm: lock_torture Not tainted 6.1.0-rc4+ #2828 [ 151.766778] Hardware name: Red Hat KVM/...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 489d8e559c6596eb08e16447d9830bc39afbe54e < 84d6ce2aef1d06a53f606211da68a2085dfeb50d, >= 489d8e559c6596eb08e16447d9830bc39afbe54e < a3b0e9ac3c2447008db942d51f593841d8329e99, >= 489d8e559c6596eb08e16447d9830bc39afbe54e < a2de9f9b686c71b4fa3663ae374f5f643c46a446, >= 489d8e559c6596eb08e16447d9830bc39afbe54e < 724b6bab0d75f1dc01fdfbf7fe8d4217a5cb90ba, >= 5.14, >= 5.14 < 6.1.20, >= 6.2 < 6.2.3
Fixed versions
6.1.20, 6.2.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416