Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: x86/mm: Check return value from memblock_phys_alloc_range() At least with CONFIG_PHYSICAL_START=0x100000, if there is < 4 MiB of contiguous free memory available at this point, the kernel will crash and burn because memblock_phys_alloc_range() returns 0 on failure, which leads memblock_phys_free() to throw the first 4 MiB of physical memory to the wolves. At a minimum it should fail gracefully with a meaningful diagnostic, but in fact everything seems to work fine without the weird reserve allocation.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a7259df7670240ee03b0cfce8a3e5d3773911e24 before 8c18c904d301ffeb33b071eadc55cd6131e1e9be; affected a7259df7670240ee03b0cfce8a3e5d3773911e24 before bffd5f2815c5234d609725cd0dc2f4bc5de2fc67; affected a7259df7670240ee03b0cfce8a3e5d3773911e24 before c6f2694c580c27dca0cf7546ee9b4bfa6b940e38; affected a7259df7670240ee03b0cfce8a3e5d3773911e24 before dde4800d2b0f68b945fd81d4fc2d4a10ae25f743; affected a7259df7670240ee03b0cfce8a3e5d3773911e24 before 631ca8909fd5c62b9fda9edda93924311a78a9c4 |
| Linux / Linux | affected 5.15; unaffected 0 before 5.15; unaffected 6.1.141 through 6.1.*; unaffected 6.6.93 through 6.6.*; unaffected 6.12.31 through 6.12.*; unaffected 6.14.9 through 6.14.*; unaffected 6.15 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/8c18c904d301ffeb33b071eadc55cd6131e1e9be
- https://git.kernel.org/stable/c/bffd5f2815c5234d609725cd0dc2f4bc5de2fc67
- https://git.kernel.org/stable/c/c6f2694c580c27dca0cf7546ee9b4bfa6b940e38
- https://git.kernel.org/stable/c/dde4800d2b0f68b945fd81d4fc2d4a10ae25f743
- https://git.kernel.org/stable/c/631ca8909fd5c62b9fda9edda93924311a78a9c4
ADP enrichment
No English description supplied.
No English description supplied.