Answer in brief
CVE-2026-89818 records a High severity (CVSS 7.1) vulnerability in drm/amdgpu/vcn: fix integer overflow in dec_msg buffer count check. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=88411caee8f576d6b5abf6531232fcc0ce756dc5 <c2340281be4ddacb8c203e2bce59b126d1d6c4c8 || >=c72a8b4dc6d598e3831ef3abd9c6527dfbf4810e <6dceaeceaa7c8396339f3ea34b0110cb912ca61b || >=7688143ca62edeecacb3ba0a2cea129dbd262a18 <47799e1f893d47d8af231710a61065e3ec8a13e8 || >=63b51e8a9d54317d31cc3856c1e12407070d5fc2 <7e28853c78c20bb8ba4c1dba702430cd05e09f76 || >=b193019860d61e92da395eae2011f2f6716b182f <9ae19bd60891bea0a7b7504cc8dbfe74570ac3b3 || >=b193019860d61e92da395eae2011f2f6716b182f <4d7390530853eb7befda9cc786e4c86e8ad7ac9e || f55552adb100eb54a6e6dabff4fbdc8679bd3fa0 || 82c535eff05490c71153af57de9fe85502fcb5d5 || 638d3e0b9eb77aa53fdd60e2b928761d16ba76fa || 870c8738c3774336baedddd0240951d078a703b8 || 638e48ee39d0f2af9336f917a6f5d6692dd64d93 || e382e0b81a3e7bd21504fee1d01ae8b08f84d3a7 || 3c817a60b09eaab926e475088e750936efcc95ae || >=6.1.175 <6.1.188 || >=6.6.140 <6.6.157 || >=6.12.90 <6.12.110 || >=6.18.32 <6.18.51 || >=5.15.209 <5.16 || >=7.0.9 <7.1 | c2340281be4ddacb8c203e2bce59b126d1d6c4c8, 6dceaeceaa7c8396339f3ea34b0110cb912ca61b, 47799e1f893d47d8af231710a61065e3ec8a13e8, 7e28853c78c20bb8ba4c1dba702430cd05e09f76, 9ae19bd60891bea0a7b7504cc8dbfe74570ac3b3, 4d7390530853eb7befda9cc786e4c86e8ad7ac9e, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 5.16, 7.1 |
| Linux/Linuxgeneric | 7.1 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
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.
Quoted source text, attributed separately from HOL analysis.