GHSA-vg7q-4fvq-5g86HighCVSS 7.1
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: fix integer...
🔗 CVE IDs covered (1)
📋 Description
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.
🔗 References (8)
- https://nvd.nist.gov/vuln/detail/CVE-2026-89818
- https://git.kernel.org/stable/c/47799e1f893d47d8af231710a61065e3ec8a13e8
- https://git.kernel.org/stable/c/4d7390530853eb7befda9cc786e4c86e8ad7ac9e
- https://git.kernel.org/stable/c/6dceaeceaa7c8396339f3ea34b0110cb912ca61b
- https://git.kernel.org/stable/c/7e28853c78c20bb8ba4c1dba702430cd05e09f76
- https://git.kernel.org/stable/c/9ae19bd60891bea0a7b7504cc8dbfe74570ac3b3
- https://git.kernel.org/stable/c/c2340281be4ddacb8c203e2bce59b126d1d6c4c8
- https://github.com/advisories/GHSA-vg7q-4fvq-5g86