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.
CVE-2026-81007
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-81007
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "51bd6f291583684f495ea498984dfc22049d7fd2",
"lessThan": "8990c7f6bfc1e7689b7012a7d4d0efb9f07a9c89",
"versionType": "git"
},
{
"status": "affected",
"version": "51bd6f291583684f495ea498984dfc22049d7fd2",
"lessThan": "94f8d20153e348c79bc14dc25f873470518892da",
"versionType": "git"
},
{
"status": "affected",
"version": "51bd6f291583684f495ea498984dfc22049d7fd2",
"lessThan": "e527cd4e80066e1ed070fdc7c705bde340cdcc62",
"versionType": "git"
},
{
"status": "affected",
"version": "51bd6f291583684f495ea498984dfc22049d7fd2",
"lessThan": "7d66d54b974cff0a959e188af844d2d110422767",
"versionType": "git"
},
{
"status": "affected",
"version": "51bd6f291583684f495ea498984dfc22049d7fd2",
"lessThan": "60939bcda6f3f104ef456fdbf3cc5733c0720fb1",
"versionType": "git"
},
{
"status": "affected",
"version": "51bd6f291583684f495ea498984dfc22049d7fd2",
"lessThan": "5719431ca2b5fa26560bb38f6202f8b97fa3bbb0",
"versionType": "git"
},
{
"status": "affected",
"version": "51bd6f291583684f495ea498984dfc22049d7fd2",
"lessThan": "a84c6e3d188f2c6e674910929eb790634299d6d5",
"versionType": "git"
},
{
"status": "affected",
"version": "51bd6f291583684f495ea498984dfc22049d7fd2",
"lessThan": "53637506884dbd5c91a89b1a3547d99d80f8ed2c",
"versionType": "git"
}
],
"programFiles": [
"drivers/char/ipmi/ipmb_dev_int.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/char/ipmi/ipmb_dev_int.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-81007
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34963 · Revision 1
- Added to Heist Feed
- Publisher date