Answer in brief
CVE-2026-89818 records a Unknown severity 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.
A CVSS score is not reported in the current record. 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
Sep 16, 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.