Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: xen/gntalloc: validate grant count before allocation gntalloc_ioctl_alloc() allocates the grant-id array before checking whether the requested count fits within the global grant limit. Counts above that limit cannot succeed, so reject them before the user-controlled allocation reaches kcalloc(). Use a subtraction-based check while holding gref_mutex so adding the requested count cannot wrap. Also cast the count before advancing the per-file index so the page-size multiplication is performed in 64-bit arithmetic.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before e2806390aa1c4d5b3f7a68f10a56ae12c71c00d8; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 71a0cf87e19fb35c4292ca88985e376e613c900a; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 641de086a05f349de7fc548612432bc2fed721ca; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 720554c04acba80018ded069d3e0984bebaee891; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 84d5727cef8eb9c8a28210ad248f1c70b223b065; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 231542f4e43cf9837cb520664545e85fbe666b7b; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2299822f3f466b5dcad2377bf63986199f881a6b; affected 0 before 5.10.271; affected 0 before 5.15.222; affected 0 before 6.1.189; affected 0 before 6.6.158; affected 0 before 6.12.111; affected 0 before 6.18.53 |
| Linux / Linux | 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 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/e2806390aa1c4d5b3f7a68f10a56ae12c71c00d8
- https://git.kernel.org/stable/c/71a0cf87e19fb35c4292ca88985e376e613c900a
- https://git.kernel.org/stable/c/641de086a05f349de7fc548612432bc2fed721ca
- https://git.kernel.org/stable/c/720554c04acba80018ded069d3e0984bebaee891
- https://git.kernel.org/stable/c/84d5727cef8eb9c8a28210ad248f1c70b223b065
- https://git.kernel.org/stable/c/231542f4e43cf9837cb520664545e85fbe666b7b
- https://git.kernel.org/stable/c/2299822f3f466b5dcad2377bf63986199f881a6b