Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: vhost/vdpa: validate virtqueue index in mmap and fault paths vhost_vdpa_mmap() and vhost_vdpa_fault() use vma->vm_pgoff as a virtqueue index for get_vq_notification(), but they do not validate that the index is smaller than v->nvqs. The ioctl path already performs both a bounds check and array_index_nospec(), but the mmap/fault path only checks that the index fits in u16. This allows an out-of-range queue index to reach driver-specific get_vq_notification() callbacks. Fix this by extracting a unified vhost_vdpa_get_vq_notification() helper that validates the queue index against v->nvqs and applies array_index_nospec() before calling the driver callback. Both the mmap and fault paths use this helper, and the bounds checking is consolidated into a single location. From source inspection, the most defensible impact is out-of-bounds access in the callback path, potentially leading to invalid PFN remaps and crash/DoS.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 before 0f310bac6db9bd3bb1655707d692d9d2a86eeb17; affected ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 before 4bf5a51963ff816f7443702dc536b9327cf5e550; affected ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 before 55a644031e610ea93fbde2702c7b8f267476552f; affected ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 before 2b3f79b90b231a682315fe2191bb71925650e183; affected ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 before bbba4f92515238d76018e9b75e41b16d83df52c8; affected ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 before 1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e; affected ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 before 32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d; affected ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 before 929e4f044621c8cc30b612fb74e1410bef09e41b |
| Linux / Linux | affected 5.8; unaffected 0 before 5.8; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/0f310bac6db9bd3bb1655707d692d9d2a86eeb17
- https://git.kernel.org/stable/c/4bf5a51963ff816f7443702dc536b9327cf5e550
- https://git.kernel.org/stable/c/55a644031e610ea93fbde2702c7b8f267476552f
- https://git.kernel.org/stable/c/2b3f79b90b231a682315fe2191bb71925650e183
- https://git.kernel.org/stable/c/bbba4f92515238d76018e9b75e41b16d83df52c8
- https://git.kernel.org/stable/c/1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e
- https://git.kernel.org/stable/c/32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d
- https://git.kernel.org/stable/c/929e4f044621c8cc30b612fb74e1410bef09e41b
ADP enrichment
No English description supplied.
No references supplied.