block: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64052
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:45 UTC
Updated2026-07-19 16:17:45 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: block: bio-integrity: Fix null-ptr-deref in bio_integrity_map_user() pin_user_pages_fast() can partially succeed and return the number of pages that were actually pinned. However, the bio_integrity_map_user() does not handle this partial pinning. This leads to a general protection fault since bvec_from_pages() dereferences an unpinned page address, which is 0. To fix this, add a check to verify that all requested memory is pinned. If partial pinning occurs, unpin the memory and return -EFAULT. Kernel Oops: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 UID: 0 PID: 1061 Comm: nvme-passthroug Not tainted 7.0.0-11783-g90957f9314e8-dirty #16 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014 RIP: 0010:bio_integrity_map_user.cold+0x1b0/0x9d6

Risk And Classification

EPSS: 0.001680000 probability, percentile 0.063830000 (date 2026-07-20)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 492c5d455969fc2e829f26ed4c83487b068f0dd7 77c059f41e9395793917d067476f549a911d77d3 git Not specified
CNA Linux Linux affected 492c5d455969fc2e829f26ed4c83487b068f0dd7 76410790f1491c8e06a451045ae223a61c652455 git Not specified
CNA Linux Linux affected 492c5d455969fc2e829f26ed4c83487b068f0dd7 8fa244738641d95ea4d70e6f9a62778bba42a5b7 git Not specified
CNA Linux Linux affected 492c5d455969fc2e829f26ed4c83487b068f0dd7 8582792cf23b3d94674d4d838f7cde9a28d0fcaf git Not specified
CNA Linux Linux affected 6.8 Not specified
CNA Linux Linux unaffected 6.8 semver Not specified
CNA Linux Linux unaffected 6.12.92 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.34 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.11 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/8fa244738641d95ea4d70e6f9a62778bba42a5b7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8582792cf23b3d94674d4d838f7cde9a28d0fcaf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/77c059f41e9395793917d067476f549a911d77d3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/76410790f1491c8e06a451045ae223a61c652455 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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