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CVE-2026-81007

ipmi: ipmb: validate write message length

HIGH
7.1
CVSS Score
Published: September 11, 2026 at 07:42 PM UTC
Updated: October 19, 2026 at 09:17 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.1
Exploit prediction
EPSS 0.1%

Description

In the Linux kernel, the following vulnerability has been resolved: ipmi: ipmb: validate write message length ipmb_write() read message fields before validating the length byte. A zero or short write can read uninitialized stack bytes. A length smaller than the SMBus header underflows the block write length. Require a non-empty buffer and the minimum IPMB request length. Also require the length byte plus payload before parsing the message.

Affected

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

Linux Kernel· Linux
90%
5.351bd6f291583684f495ea498984dfc22049d7fd2
Vendor states this is fixed in 53637506884dbd5c91a89b1a3547d99d80f8ed2c (fixed)
Vendor states this is fixed in 5719431ca2b5fa26560bb38f6202f8b97fa3bbb0 (fixed)
Vendor states this is fixed in 60939bcda6f3f104ef456fdbf3cc5733c0720fb1 (fixed)
Vendor states this is fixed in 7d66d54b974cff0a959e188af844d2d110422767 (fixed)
Vendor states this is fixed in 8990c7f6bfc1e7689b7012a7d4d0efb9f07a9c89 (fixed)
Vendor states this is fixed in 94f8d20153e348c79bc14dc25f873470518892da (fixed)
Vendor states this is fixed in a84c6e3d188f2c6e674910929eb790634299d6d5 (fixed)
Vendor states this is fixed in e527cd4e80066e1ed070fdc7c705bde340cdcc62 (fixed)
Vendor states this is fixed in 5.10.270 (unaffected)
Vendor states this is fixed in 5.15.221 (unaffected)
Vendor states this is fixed in 5.3 (unaffected)
Vendor states this is fixed in 6.1.188 (unaffected)
Vendor states this is fixed in 6.12.109 (unaffected)
Vendor states this is fixed in 6.18.50 (unaffected)
Vendor states this is fixed in 6.6.157 (unaffected)
Vendor states this is fixed in 7.2.4 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc1 (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 (8)

Source: cverecord
https://git.kernel.org/stable/c/60939bcda6f3f104ef456fdbf3cc5733c0720fb1
Source: cverecord
https://git.kernel.org/stable/c/5719431ca2b5fa26560bb38f6202f8b97fa3bbb0
Source: cverecord
https://git.kernel.org/stable/c/a84c6e3d188f2c6e674910929eb790634299d6d5
Source: cverecord
https://git.kernel.org/stable/c/53637506884dbd5c91a89b1a3547d99d80f8ed2c
Source: cverecord
https://git.kernel.org/stable/c/8990c7f6bfc1e7689b7012a7d4d0efb9f07a9c89
Source: cverecord
https://git.kernel.org/stable/c/94f8d20153e348c79bc14dc25f873470518892da
Source: cverecord
https://git.kernel.org/stable/c/e527cd4e80066e1ed070fdc7c705bde340cdcc62
Source: cverecord
https://git.kernel.org/stable/c/7d66d54b974cff0a959e188af844d2d110422767

CVSS

7.1HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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