CVE-2026-89818

CVE CVE-2026-89818EUVD EUVD-2026-80418Published 2026-09-16T10:30:50.000ZLast changed 2026-09-16T14:38:59.000ZCVSS 7.1

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux c72a8b4dc6d598e3831ef3abd9c6527dfbf4810e <6dceaeceaa7c8396339f3ea34b0110cb912ca61b; b193019860d61e92da395eae2011f2f6716b182f <9ae19bd60891bea0a7b7504cc8dbfe74570ac3b3; patch: 7.2.5; 6.18.32 <6.18.51; 870c8738c3774336baedddd0240951d078a703b8; 63b51e8a9d54317d31cc3856c1e12407070d5fc2 <7e28853c78c20bb8ba4c1dba702430cd05e09f76; 638e48ee39d0f2af9336f917a6f5d6692dd64d93; b193019860d61e92da395eae2011f2f6716b182f <4d7390530853eb7befda9cc786e4c86e8ad7ac9e; 3c817a60b09eaab926e475088e750936efcc95ae; patch: 6.18.51; 88411caee8f576d6b5abf6531232fcc0ce756dc5 <c2340281be4ddacb8c203e2bce59b126d1d6c4c8; 7688143ca62edeecacb3ba0a2cea129dbd262a18 <47799e1f893d47d8af231710a61065e3ec8a13e8; patch: 6.12.110; e382e0b81a3e7bd21504fee1d01ae8b08f84d3a7; 638d3e0b9eb77aa53fdd60e2b928761d16ba76fa; f55552adb100eb54a6e6dabff4fbdc8679bd3fa0; 5.15.209 <5.16; patch: 0; 6.12.90 <6.12.110; 7.0.9 <7.1; 6.6.140 <6.6.157; 6.1.175 <6.1.188; patch: 6.1.188; 82c535eff05490c71153af57de9fe85502fcb5d5; 7.1; patch: 6.6.157; patch: 7.3-rc1

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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