01 Record

CVE-2026-23428

ksmbd: fix use-after-free of share_conf in compound request

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

ksmbd: fix use-after-free of share_conf in compound request

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

0.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 26.0% 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 2026-10-19.

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

2026-04-03 15:15Z6 MO AGO

Last updated

2026-10-19 18:35Z9 DAYS AGO

Reserved

2026-01-13

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
CWE-825Expired Pointer DereferenceBase

Data version

5.2

Document digest

fb2df02cf528a022157cbc8efbbb232fa00fcd7d4e3a62a07b6f57f373c799f8

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxeb947403518ea3d93f6d89264bb1f5416bb0c7d0 to < d08417981155883068b7260d9500ca306a03edac, 854156d12caa9d36de1cf5f084591c7686cc8a9d to < eae0dc86f71e6f3294c0cd7ffc05039258d243af, 5005bcb4219156f1bf7587b185080ec1da08518e to < 806f13752652216db0c309392b4db3e64eeed4f2, 5005bcb4219156f1bf7587b185080ec1da08518e to < c742b46a153d3ff95ff0825ab1950c87b9e14470, 5005bcb4219156f1bf7587b185080ec1da08518e to < 7f7468fd2a7554cea91b7d430335a3dbf01dcc09, 5005bcb4219156f1bf7587b185080ec1da08518e to < a5929c2020ce54e1dcbd1078c0f30b8aaf73c105, 5005bcb4219156f1bf7587b185080ec1da08518e to < c33615f995aee80657b9fdfbc4ee7f49c2bd733d, d1066c1b3663401cd23c0d6e60cdae750ce00c0f, 5.15.121 to < 5.15.203, 6.1.36 to < 6.1.167, 6.3.10 to < 6.4, 6.4—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/d08417981155883068b7260d9500ca306a03edac
git.kernel.orghttps://git.kernel.org/stable/c/eae0dc86f71e6f3294c0cd7ffc05039258d243af
git.kernel.orghttps://git.kernel.org/stable/c/806f13752652216db0c309392b4db3e64eeed4f2
git.kernel.orghttps://git.kernel.org/stable/c/c742b46a153d3ff95ff0825ab1950c87b9e14470
git.kernel.orghttps://git.kernel.org/stable/c/7f7468fd2a7554cea91b7d430335a3dbf01dcc09
git.kernel.orghttps://git.kernel.org/stable/c/a5929c2020ce54e1dcbd1078c0f30b8aaf73c105
git.kernel.orghttps://git.kernel.org/stable/c/c33615f995aee80657b9fdfbc4ee7f49c2bd733d

07 Fixed in

Debian 12

linux
Fixed in 6.1.170-1

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

Debian 13

linux
Fixed in 6.12.85-1

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

Debian 14

linux
Fixed in 6.19.10-1

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