Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 88411caee8f576d6b5abf6531232fcc0ce756dc5 before c2340281be4ddacb8c203e2bce59b126d1d6c4c8; affected c72a8b4dc6d598e3831ef3abd9c6527dfbf4810e before 6dceaeceaa7c8396339f3ea34b0110cb912ca61b; affected 7688143ca62edeecacb3ba0a2cea129dbd262a18 before 47799e1f893d47d8af231710a61065e3ec8a13e8; affected 63b51e8a9d54317d31cc3856c1e12407070d5fc2 before 7e28853c78c20bb8ba4c1dba702430cd05e09f76; affected b193019860d61e92da395eae2011f2f6716b182f before 9ae19bd60891bea0a7b7504cc8dbfe74570ac3b3; affected b193019860d61e92da395eae2011f2f6716b182f before 4d7390530853eb7befda9cc786e4c86e8ad7ac9e; affected f55552adb100eb54a6e6dabff4fbdc8679bd3fa0; affected 82c535eff05490c71153af57de9fe85502fcb5d5; affected 638d3e0b9eb77aa53fdd60e2b928761d16ba76fa; affected 870c8738c3774336baedddd0240951d078a703b8; affected 638e48ee39d0f2af9336f917a6f5d6692dd64d93; affected e382e0b81a3e7bd21504fee1d01ae8b08f84d3a7; affected 3c817a60b09eaab926e475088e750936efcc95ae; affected 6.1.175 before 6.1.188; affected 6.6.140 before 6.6.157; affected 6.12.90 before 6.12.110; affected 6.18.32 before 6.18.51; affected 5.15.209 before 5.16; affected 7.0.9 before 7.1 |
| Linux / Linux | affected 7.1; unaffected 0 before 7.1; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c2340281be4ddacb8c203e2bce59b126d1d6c4c8
- https://git.kernel.org/stable/c/6dceaeceaa7c8396339f3ea34b0110cb912ca61b
- https://git.kernel.org/stable/c/47799e1f893d47d8af231710a61065e3ec8a13e8
- https://git.kernel.org/stable/c/7e28853c78c20bb8ba4c1dba702430cd05e09f76
- https://git.kernel.org/stable/c/9ae19bd60891bea0a7b7504cc8dbfe74570ac3b3
- https://git.kernel.org/stable/c/4d7390530853eb7befda9cc786e4c86e8ad7ac9e