drm/amdgpu/vcn: fix integer overflow in dec_msg buffer count check
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: fix integer overflow in dec_msg buffer count check If the supplied msg[2] (num_buffers) is 0x3FFFFFFF, the expression 6 + num_buffers * 4 wraps to 2 and the bounds check passes, letting the parser loop far past the end of the message BO. Triggering it additionally requires a ~4GiB mapping so that msg[1] survives the earlier "header does not fit in BO" check. Rewrite the test in division form, which is overflow-free by construction. Also update the message to reflect that msg is invalid.
CVE-2026-89818
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-2026-89818
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": "88411caee8f576d6b5abf6531232fcc0ce756dc5",
"lessThan": "c2340281be4ddacb8c203e2bce59b126d1d6c4c8",
"versionType": "git"
},
{
"status": "affected",
"version": "c72a8b4dc6d598e3831ef3abd9c6527dfbf4810e",
"lessThan": "6dceaeceaa7c8396339f3ea34b0110cb912ca61b",
"versionType": "git"
},
{
"status": "affected",
"version": "7688143ca62edeecacb3ba0a2cea129dbd262a18",
"lessThan": "47799e1f893d47d8af231710a61065e3ec8a13e8",
"versionType": "git"
},
{
"status": "affected",
"version": "63b51e8a9d54317d31cc3856c1e12407070d5fc2",
"lessThan": "7e28853c78c20bb8ba4c1dba702430cd05e09f76",
"versionType": "git"
},
{
"status": "affected",
"version": "b193019860d61e92da395eae2011f2f6716b182f",
"lessThan": "9ae19bd60891bea0a7b7504cc8dbfe74570ac3b3",
"versionType": "git"
},
{
"status": "affected",
"version": "b193019860d61e92da395eae2011f2f6716b182f",
"lessThan": "4d7390530853eb7befda9cc786e4c86e8ad7ac9e",
"versionType": "git"
},
{
"status": "affected",
"version": "f55552adb100eb54a6e6dabff4fbdc8679bd3fa0",
"versionType": "git"
},
{
"status": "affected",
"version": "82c535eff05490c71153af57de9fe85502fcb5d5",
"versionType": "git"
},
{
"status": "affected",
"version": "638d3e0b9eb77aa53fdd60e2b928761d16ba76fa",
"versionType": "git"
},
{
"status": "affected",
"version": "870c8738c3774336baedddd0240951d078a703b8",
"versionType": "git"
},
{
"status": "affected",
"version": "638e48ee39d0f2af9336f917a6f5d6692dd64d93",
"versionType": "git"
},
{
"status": "affected",
"version": "e382e0b81a3e7bd21504fee1d01ae8b08f84d3a7",
"versionType": "git"
},
{
"status": "affected",
"version": "3c817a60b09eaab926e475088e750936efcc95ae",
"versionType": "git"
},
{
"status": "affected",
"version": "6.1.175",
"lessThan": "6.1.188",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.140",
"lessThan": "6.6.157",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.90",
"lessThan": "6.12.110",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.32",
"lessThan": "6.18.51",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.209",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "affected",
"version": "7.0.9",
"lessThan": "7.1",
"versionType": "semver"
}
],
"programFiles": [
"drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c",
"drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.1",
"versionType": "semver"
},
{
"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/gpu/drm/amd/amdgpu/vcn_v3_0.c",
"drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89818
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #36277 · Revision 1
- Added to Heist Feed
- Publisher date