crypto: ccp - Fix snp_filter_reserved_mem_regions() off-by-one

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74404
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:42 UTC
Updated2026-08-15 06:22:42 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1ca5614b84eed5904f65f143e0e7aaab0ac4c6b2 830c1f3e71989448652973375ef5e39b6ede47a3 git Not specified
CNA Linux Linux affected 1ca5614b84eed5904f65f143e0e7aaab0ac4c6b2 c5c79d92da0f9a09f48be5e2aabed2d6d1a96294 git Not specified
CNA Linux Linux affected 1ca5614b84eed5904f65f143e0e7aaab0ac4c6b2 af7341616b742ad2c374a90998bd650a035f694d git Not specified
CNA Linux Linux affected 1ca5614b84eed5904f65f143e0e7aaab0ac4c6b2 1b864b6cb213bbd7b406e9b2e98c962077f300df git Not specified
CNA Linux Linux affected 6.9 Not specified
CNA Linux Linux unaffected 6.9 semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/af7341616b742ad2c374a90998bd650a035f694d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/830c1f3e71989448652973375ef5e39b6ede47a3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c5c79d92da0f9a09f48be5e2aabed2d6d1a96294 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1b864b6cb213bbd7b406e9b2e98c962077f300df 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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