01 Record

CVE-2023-54258

cifs: fix potential oops in cifs_oplock_break

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

cifs: fix potential oops in cifs_oplock_break

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

0.55% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 46.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Deferred. 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

2025-12-30 12:15Z10 MO AGO

Last updated

2026-10-15 21:41Z13 DAYS AGO

Reserved

2025-12-30

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-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

3a128ac800cbc54618c163f233f291e62987fe6c5c8151a24f1b4cf2cc633775

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux63fb45ddc491895c4b36664e0c2c3b548545ae93 to < b99f490ea87ebcca3a429fd8837067feb56a4c7c, 1bf709b9625001eefdd41048c5f4c7544ee33394 to < 5ee28bcfbaacf289eb25c662a2862542ea6ce6a7, 3b4c15171c3ce9120c81f5564b9367d8d0f4219c to < 6b67a6d2e50634fe127e656147c81915955e9f5e, da787d5b74983f7525d1eb4b9c0b4aff2821511a to < e8f5f849ffce24490eb9449e98312b66c0dba76f, cff7fb969edaeff2bc80c8a8f7cf7b0c8df32da7, 6.3.13 to < 6.4, 5.15.121 to < 5.15.128, 6.1.39 to < 6.1.47, 6.4.4 to < 6.4.12—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/b99f490ea87ebcca3a429fd8837067feb56a4c7c
git.kernel.orghttps://git.kernel.org/stable/c/5ee28bcfbaacf289eb25c662a2862542ea6ce6a7
git.kernel.orghttps://git.kernel.org/stable/c/6b67a6d2e50634fe127e656147c81915955e9f5e
git.kernel.orghttps://git.kernel.org/stable/c/e8f5f849ffce24490eb9449e98312b66c0dba76f

07 Fixed in

Debian 13

linux
Fixed in 6.4.13-1

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

Debian 14

linux
Fixed in 6.4.13-1

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