CVE-2026-74404
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - Fix snp_filter_reserved_mem_regions() off-by-one Sashiko notes: > regarding the bounds check in snp_filter_reserved_mem_regions() > called via walk_iomem_res_desc(): does the check > if ((range_list->num_elements * 16 + 8) > PAGE_SIZE) > allow an off-by-one heap buffer overflow? > > If range_list->num_elements is 255, 255 * 16 + 8 = 4088, which is <= 4096. > Writing range->base (8 bytes) fills 4088-4095, but writing range->page_count > (4 bytes) would write to 4096-4099, overflowing the kzalloc-allocated > PAGE_SIZE buffer. Fix this by accounting for the entry about to be written to, in addition to the entries that are already allocated.
How to fix
- Linux Linux830c1f3e71989448652973375ef5e39b6ede47a3, c5c79d92da0f9a09f48be5e2aabed2d6d1a96294, af7341616b742ad2c374a90998bd650a035f694d, 1b864b6cb213bbd7b406e9b2e98c962077f300df or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 1ca5614b84eed5904f65f143e0e7aaab0ac4c6b2 ≤ v < 830c1f3e71989448652973375ef5e39b6ede47a3, 1ca5614b84eed5904f65f143e0e7aaab0ac4c6b2 ≤ v < c5c79d92da0f9a09f48be5e2aabed2d6d1a96294, 1ca5614b84eed5904f65f143e0e7aaab0ac4c6b2 ≤ v < af7341616b742ad2c374a90998bd650a035f694d, 1ca5614b84eed5904f65f143e0e7aaab0ac4c6b2 ≤ v < 1b864b6cb213bbd7b406e9b2e98c962077f300df, 6.9 | 830c1f3e71989448652973375ef5e39b6ede47a3, c5c79d92da0f9a09f48be5e2aabed2d6d1a96294, af7341616b742ad2c374a90998bd650a035f694d, 1b864b6cb213bbd7b406e9b2e98c962077f300df |
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