01 Record

CVE-2023-53629

fs: dlm: fix use after free in midcomms commit

CriticalPUBLISHEDCNA: Linux

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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02 Description

fs: dlm: fix use after free in midcomms commit

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.49% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 42.4% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-15.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2025-10-07 15:19Z1 YR AGO

Last updated

2026-10-15 21:41Z13 DAYS AGO

Reserved

2025-10-07

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

CWE-416Use After FreeVariant

Data version

5.2

Document digest

c8e50aaaf44874648c3f5bbbacb7120dcc9b563b45e04ad78e840c0e07306976

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux489d8e559c6596eb08e16447d9830bc39afbe54e to < 84d6ce2aef1d06a53f606211da68a2085dfeb50d, 489d8e559c6596eb08e16447d9830bc39afbe54e to < a3b0e9ac3c2447008db942d51f593841d8329e99, 489d8e559c6596eb08e16447d9830bc39afbe54e to < a2de9f9b686c71b4fa3663ae374f5f643c46a446, 489d8e559c6596eb08e16447d9830bc39afbe54e to < 724b6bab0d75f1dc01fdfbf7fe8d4217a5cb90ba, 5.14—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/84d6ce2aef1d06a53f606211da68a2085dfeb50d
git.kernel.orghttps://git.kernel.org/stable/c/a3b0e9ac3c2447008db942d51f593841d8329e99
git.kernel.orghttps://git.kernel.org/stable/c/a2de9f9b686c71b4fa3663ae374f5f643c46a446
git.kernel.orghttps://git.kernel.org/stable/c/724b6bab0d75f1dc01fdfbf7fe8d4217a5cb90ba

07 Fixed in

Debian 12

linux
Fixed in 6.1.20-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.1.20-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.1.20-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.