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CVE-2026-89792

ksmbd: prevent out-of-bounds reads in share config responses

HIGH
7.1
CVSS Score
Published: September 16, 2026 at 08:50 AM UTC
Updated: October 19, 2026 at 09:18 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.1
Exploit prediction
EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds reads in share config responses Validate IPC share configuration payload sizes before consuming variable-length fields. Bound veto list parsing and account for the separator byte when deriving the path length.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
5.15.15751a6c2af9d20203ddeeaf73314ba8854b38d01bd6.1.856.6.266.8.56.976af689a45aa44714b46d1a7de4ffdf851ded89688b7f1143b15b29cccb8392b4f38e75b7bb3e300a637fabac554270a851033f5ab402ecb90bc479ca677ebd8ca2f2632ccdecbad7b87641274e15aac
Vendor states this is fixed in 0127f1c119bde40578f4d25f5d17333b4e75de8c (fixed)
Vendor states this is fixed in 61a8d06600c8c397f9a7e01940479d4c94a82f5f (fixed)
Vendor states this is fixed in cd2bcee450bc94770be56c0b896c1a1dc6838bd8 (fixed)
Vendor states this is fixed in df8aa4a09733c4d3974b1db32c1782b3aad3a151 (fixed)
Vendor states this is fixed in f25e93768fcc5d8287e50b1ec52a42e4c276df34 (fixed)
Vendor states this is fixed in fd636a87161def6e35876ab7943641ce457974c8 (fixed)
Vendor states this is fixed in ffa507f5f774cb4d45136b106989ebc051361263 (fixed)
Vendor states this is fixed in 5.15.222 (unaffected)
Vendor states this is fixed in 6.1.189 (unaffected)
Vendor states this is fixed in 6.12.111 (unaffected)
Vendor states this is fixed in 6.18.53 (unaffected)
Vendor states this is fixed in 6.6.158 (unaffected)
Vendor states this is fixed in 6.9 (unaffected)
Vendor states this is fixed in 7.2.6 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (7)

Source: cverecord
https://git.kernel.org/stable/c/61a8d06600c8c397f9a7e01940479d4c94a82f5f
Source: cverecord
https://git.kernel.org/stable/c/f25e93768fcc5d8287e50b1ec52a42e4c276df34
Source: cverecord
https://git.kernel.org/stable/c/ffa507f5f774cb4d45136b106989ebc051361263
Source: cverecord
https://git.kernel.org/stable/c/cd2bcee450bc94770be56c0b896c1a1dc6838bd8
Source: cverecord
https://git.kernel.org/stable/c/df8aa4a09733c4d3974b1db32c1782b3aad3a151
Source: cverecord
https://git.kernel.org/stable/c/0127f1c119bde40578f4d25f5d17333b4e75de8c
Source: cverecord
https://git.kernel.org/stable/c/fd636a87161def6e35876ab7943641ce457974c8

CVSS

7.1HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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