dm-integrity: replace forgeable discard filler with a keyed sector marker
In the Linux kernel, the following vulnerability has been resolved: dm-integrity: replace forgeable discard filler with a keyed sector marker The discard-block check in dm_integrity_rw_tag() treats a stored tag of all 0xf6 bytes (DISCARD_FILLER) as proof a block was discarded and skips HMAC verification. allow_discards is only accepted in dm-integrity's standalone mode. An attacker with raw write access to the backing device, but without the integrity key, can stamp any block with an all-0xf6 tag and have it served as authentic. Add a new "allow_discards_keyed" target argument that marks discarded blocks with a keyed checksum of (salt || sector) instead, computed by integrity_discard_checksum().
CVE-2026-90333
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-2026-90333
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": "84597a44a9d86ac949900441cea7da0af0f2f473",
"lessThan": "388c3f6496bb8083576d989e6d249ba9807c6b0b",
"versionType": "git"
},
{
"status": "affected",
"version": "84597a44a9d86ac949900441cea7da0af0f2f473",
"lessThan": "5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775",
"versionType": "git"
},
{
"status": "affected",
"version": "84597a44a9d86ac949900441cea7da0af0f2f473",
"lessThan": "6228722c27304e4682cddc1fede03898f87e4414",
"versionType": "git"
},
{
"status": "affected",
"version": "84597a44a9d86ac949900441cea7da0af0f2f473",
"lessThan": "68c5c42567bc462139128968ebbfadd0aefff519",
"versionType": "git"
}
],
"programFiles": [
"Documentation/admin-guide/device-mapper/dm-ima.rst",
"Documentation/admin-guide/device-mapper/dm-integrity.rst",
"drivers/md/dm-integrity.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"Documentation/admin-guide/device-mapper/dm-ima.rst",
"Documentation/admin-guide/device-mapper/dm-integrity.rst",
"drivers/md/dm-integrity.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90333
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48666 · Revision 1
- Added to Heist Feed
- Publisher date