CVE-2026-89792

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

State: Published
Severity: 7.1 High
Published: Sep 16, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	88b7f1143b15b29cccb8392b4f38e75b7bb3e300 to before df8aa4a09733c4d3974b1db32c1782b3aad3a151Affected 51a6c2af9d20203ddeeaf73314ba8854b38d01bd to before 0127f1c119bde40578f4d25f5d17333b4e75de8cAffected a637fabac554270a851033f5ab402ecb90bc479c to before fd636a87161def6e35876ab7943641ce457974c8Affected a677ebd8ca2f2632ccdecbad7b87641274e15aac to before ffa507f5f774cb4d45136b106989ebc051361263Affected a677ebd8ca2f2632ccdecbad7b87641274e15aac to before cd2bcee450bc94770be56c0b896c1a1dc6838bd8Affected a677ebd8ca2f2632ccdecbad7b87641274e15aac to before 61a8d06600c8c397f9a7e01940479d4c94a82f5fAffected a677ebd8ca2f2632ccdecbad7b87641274e15aac to before f25e93768fcc5d8287e50b1ec52a42e4c276df34Affected 76af689a45aa44714b46d1a7de4ffdf851ded896Affected 5.15.157 to before 5.15.222Affected 6.1.85 to before 6.1.189Affected 6.6.26 to before 6.6.158Affected 6.8.5 to before 6.9Affected
LinuxLinux	6.9Affected before 6.9Not affected 5.15.222 through 5.15.Not affected 6.1.189 through 6.1.Not affected 6.6.158 through 6.6.Not affected 6.12.111 through 6.12.Not affected 6.18.53 through 6.18.Not affected 7.2.6 through 7.2.Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

88b7f1143b15b29cccb8392b4f38e75b7bb3e300 to before df8aa4a09733c4d3974b1db32c1782b3aad3a151Affected
51a6c2af9d20203ddeeaf73314ba8854b38d01bd to before 0127f1c119bde40578f4d25f5d17333b4e75de8cAffected
a637fabac554270a851033f5ab402ecb90bc479c to before fd636a87161def6e35876ab7943641ce457974c8Affected
a677ebd8ca2f2632ccdecbad7b87641274e15aac to before ffa507f5f774cb4d45136b106989ebc051361263Affected
a677ebd8ca2f2632ccdecbad7b87641274e15aac to before cd2bcee450bc94770be56c0b896c1a1dc6838bd8Affected
a677ebd8ca2f2632ccdecbad7b87641274e15aac to before 61a8d06600c8c397f9a7e01940479d4c94a82f5fAffected
a677ebd8ca2f2632ccdecbad7b87641274e15aac to before f25e93768fcc5d8287e50b1ec52a42e4c276df34Affected
76af689a45aa44714b46d1a7de4ffdf851ded896Affected
5.15.157 to before 5.15.222Affected
6.1.85 to before 6.1.189Affected
6.6.26 to before 6.6.158Affected
6.8.5 to before 6.9Affected

LinuxLinux

6.9Affected
before 6.9Not affected
5.15.222 through 5.15.*Not affected
6.1.189 through 6.1.*Not affected
6.6.158 through 6.6.*Not affected
6.12.111 through 6.12.*Not affected
6.18.53 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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