Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: iommufd: Don't overflow during division for dirty tracking If pgshift is 63 then BITS_PER_TYPE(*bitmap->bitmap) * pgsize will overflow to 0 and this triggers divide by 0. In this case the index should just be 0, so reorganize things to divide by shift and avoid hitting any overflows.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 before 07105e61882ff4a7d58db63cc5f9e90c6c60506c; affected 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 before 4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69; affected 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 before de7f2c67ceb1941b05b04ac35458a03e93cc57b1; affected 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 before dbf316fc90aa954dcd5440817f4b944627ed63e0; affected 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 before cb30dfa75d55eced379a42fd67bd5fb7ec38555e |
| Linux / Linux | affected 6.1; unaffected 0 before 6.1; unaffected 6.1.159 through 6.1.*; unaffected 6.6.117 through 6.6.*; unaffected 6.12.58 through 6.12.*; unaffected 6.17.8 through 6.17.*; unaffected 6.18 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/07105e61882ff4a7d58db63cc5f9e90c6c60506c
- https://git.kernel.org/stable/c/4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69
- https://git.kernel.org/stable/c/de7f2c67ceb1941b05b04ac35458a03e93cc57b1
- https://git.kernel.org/stable/c/dbf316fc90aa954dcd5440817f4b944627ed63e0
- https://git.kernel.org/stable/c/cb30dfa75d55eced379a42fd67bd5fb7ec38555e