Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba The commit b1af23d836f8 ("KVM: PPC: iommu: Unify TCE checking") unified IOBA parameter checking across KVM and VFIO into iommu_tce_check_ioba(). While doing so, the passed in argument npages is ignored and constant value '1' is used leaving out a possible overflow as the callers can legitimately be using npages > 1 for H_STUFF_TCE or H_PUT_TCE_INDIRECT cases. Fix this by accounting for 'npages', checking for arithmetic overflow, and verifying that the entire requested range (ioba - offset + npages) does not exceed the table capacity 'size'.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b1af23d836f811137d504d14d4cbdd01929dec34 before 98d8dcc4ebd10523507d4478e148809a7771a213; affected b1af23d836f811137d504d14d4cbdd01929dec34 before 9fd9c9bbb05417f468a11fb6d145d7ff61f4a868; affected b1af23d836f811137d504d14d4cbdd01929dec34 before 3776bf56e06980e8a12c8c0565d9e6ac44965f03; affected b1af23d836f811137d504d14d4cbdd01929dec34 before d6a1779129d936bc1fbab80181165da544eab736; affected b1af23d836f811137d504d14d4cbdd01929dec34 before d48ceb6e1a6915c7bac4f902554a1047365cdff2; affected b1af23d836f811137d504d14d4cbdd01929dec34 before 0543813753ef5cfbd6fa96694f7acf783fa01af7; affected b1af23d836f811137d504d14d4cbdd01929dec34 before 314091243159f8e3749bc719bb129f423f72fd86; affected b1af23d836f811137d504d14d4cbdd01929dec34 before 0b271f7d7f5ed45bc498a03ce0aa9cfd8402fc71 |
| Linux / Linux | affected 4.12; unaffected 0 before 4.12; unaffected 5.10.271 through 5.10.*; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/98d8dcc4ebd10523507d4478e148809a7771a213
- https://git.kernel.org/stable/c/9fd9c9bbb05417f468a11fb6d145d7ff61f4a868
- https://git.kernel.org/stable/c/3776bf56e06980e8a12c8c0565d9e6ac44965f03
- https://git.kernel.org/stable/c/d6a1779129d936bc1fbab80181165da544eab736
- https://git.kernel.org/stable/c/d48ceb6e1a6915c7bac4f902554a1047365cdff2
- https://git.kernel.org/stable/c/0543813753ef5cfbd6fa96694f7acf783fa01af7
- https://git.kernel.org/stable/c/314091243159f8e3749bc719bb129f423f72fd86
- https://git.kernel.org/stable/c/0b271f7d7f5ed45bc498a03ce0aa9cfd8402fc71