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CVE-2026-64052

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

In 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
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 492c5d455969fc2e829f26ed4c83487b068f0dd7
Version < 77c059f41e9395793917d067476f549a911d77d3
Status affected
Version 492c5d455969fc2e829f26ed4c83487b068f0dd7
Version < 76410790f1491c8e06a451045ae223a61c652455
Status affected
Version 492c5d455969fc2e829f26ed4c83487b068f0dd7
Version < 8fa244738641d95ea4d70e6f9a62778bba42a5b7
Status affected
Version 492c5d455969fc2e829f26ed4c83487b068f0dd7
Version < 8582792cf23b3d94674d4d838f7cde9a28d0fcaf
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.8
Status affected
Version 0
Version < 6.8
Status unaffected
Version <= 6.12.*
Version 6.12.92
Status unaffected
Version <= 6.18.*
Version 6.18.34
Status unaffected
Version <= 7.0.*
Version 7.0.11
Status unaffected
Version <= *
Version 7.1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.17% 0.064
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/77c059f41e9395793917d067476f549a911d77d3
https://git.kernel.org/stable/c/76410790f1491c8e06a451045ae223a61c652455
https://git.kernel.org/stable/c/8fa244738641d95ea4d70e6f9a62778bba42a5b7
https://git.kernel.org/stable/c/8582792cf23b3d94674d4d838f7cde9a28d0fcaf