High

CVE-2026-81007 — ipmi: ipmb: validate write message length

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.

Published Sep 11, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.1% (30-day exploitation probability)+0
Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.13%

ahead of 2% of scored CVEs · Oct 15, 2026

Affects

Linux

CVSS base

7.1

High · 2 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 51bd6f291583684f495ea498984dfc22049d7fd2 and < 8990c7f6bfc1e7689b7012a7d4d0efb9f07a9c89≥ 51bd6f291583684f495ea498984dfc22049d7fd2 and < 94f8d20153e348c79bc14dc25f873470518892da≥ 51bd6f291583684f495ea498984dfc22049d7fd2 and < e527cd4e80066e1ed070fdc7c705bde340cdcc62≥ 51bd6f291583684f495ea498984dfc22049d7fd2 and < 7d66d54b974cff0a959e188af844d2d110422767≥ 51bd6f291583684f495ea498984dfc22049d7fd2 and < 60939bcda6f3f104ef456fdbf3cc5733c0720fb1≥ 51bd6f291583684f495ea498984dfc22049d7fd2 and < 5719431ca2b5fa26560bb38f6202f8b97fa3bbb0≥ 51bd6f291583684f495ea498984dfc22049d7fd2 and < a84c6e3d188f2c6e674910929eb790634299d6d5≥ 51bd6f291583684f495ea498984dfc22049d7fd2 and < 53637506884dbd5c91a89b1a3547d99d80f8ed2c and 1 more version 5.3	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.1	CVSS 3.1	High	1.8	5.2	416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database
7.1	CVSS 3.1	High	—	—	Linux via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H (score shown at the top: 416baaa9-dc9f-4396-8d5f-8c081fb06d67)

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.

endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 7.1
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 11, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/53637506884dbd5c91a89b1a3547d99d80f8ed2c
NIST National Vulnerability Database
git.kernel.org/stable/c/60939bcda6f3f104ef456fdbf3cc5733c0720fb1
NIST National Vulnerability Database
git.kernel.org/stable/c/a84c6e3d188f2c6e674910929eb790634299d6d5
NIST National Vulnerability Database
git.kernel.org/stable/c/7d66d54b974cff0a959e188af844d2d110422767
NIST National Vulnerability Database
git.kernel.org/stable/c/8990c7f6bfc1e7689b7012a7d4d0efb9f07a9c89
NIST National Vulnerability Database
git.kernel.org/stable/c/5719431ca2b5fa26560bb38f6202f8b97fa3bbb0
NIST National Vulnerability Database
git.kernel.org/stable/c/94f8d20153e348c79bc14dc25f873470518892da
NIST National Vulnerability Database
git.kernel.org/stable/c/e527cd4e80066e1ed070fdc7c705bde340cdcc62
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 16h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 16h
Unknown CVE-2026-98431 RDMA/uverbs: Fix mmap_lock/disassociation_lock circular dependency 1d
Unknown CVE-2026-98430 RDMA/efa: Keep admin queues alive while IRQ is registered 1d
Unknown CVE-2026-98429 RDMA/efa: Keep EQ resources alive while IRQ is registered 1d
Unknown CVE-2026-98428 ALSA: usb: 6fire: Avoid embedded URBs 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-81007 is "ipmi: ipmb: validate write message length", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.1 describes technical severity. EPSS 0.13% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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