mtd: afs: validate v2 image info bounds
In the Linux kernel, the following vulnerability has been resolved: mtd: afs: validate v2 image info bounds The AFS v2 parser uses footer[8] to locate the image information block inside the current erase block, then uses the image information region_count to walk entries from a fixed local array. The footer offset and region count come from flash contents and are not checked against the erase block or the local image-info array before use. Reject v2 entries whose image information offset would underflow the erase block calculation, and reject region counts that cannot fit in the local image-info array before walking region entries.
CVE-2026-89954
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-2026-89954
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": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
"lessThan": "1bec05a68414cf8d0cab6cb42445b8603f32ffc4",
"versionType": "git"
},
{
"status": "affected",
"version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
"lessThan": "3ad8ff12fd44b08af9212ac4883a7e29d2ab7348",
"versionType": "git"
},
{
"status": "affected",
"version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
"lessThan": "875daa3c750814ff2e2dc050239c390048f0bcd0",
"versionType": "git"
},
{
"status": "affected",
"version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
"lessThan": "da740539e8f370767317e24615349b9342a6e773",
"versionType": "git"
},
{
"status": "affected",
"version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
"lessThan": "1edea8900ca3e405c1421d8b5c29f97107874f72",
"versionType": "git"
},
{
"status": "affected",
"version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
"lessThan": "18916f475057cbd2fb8ea6ae86e6b85884ad1d53",
"versionType": "git"
},
{
"status": "affected",
"version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
"lessThan": "d14e6298139f58a87a87d7022e26a7f37f0ddce7",
"versionType": "git"
},
{
"status": "affected",
"version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
"lessThan": "e9290031f736e99ad17c25c00311c92c266843b7",
"versionType": "git"
}
],
"programFiles": [
"drivers/mtd/parsers/afs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.2",
"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": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/mtd/parsers/afs.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89954
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #36395 · Revision 1
- Added to Heist Feed
- Publisher date