ublk: check import_ubuf() return value

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-90324
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:30 UTC
Updated2026-10-21 13:20:50 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ublk: check import_ubuf() return value import_ubuf() can fail if the address range (provided by the userspace ublk server) is outside the allowed user address space. Return that 0 bytes were copied if import_ubuf() fails rather than passing an uninitialized struct iov_iter to ublk_copy_user_pages().

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001730000 probability, percentile 0.064150000 (date 2026-10-21)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 981f95a571e3ca20a496c0b77dbf6b06039c6648 7f97c762b5f6e0005c5c7d040ded73bf7fb3587e git Not specified
CNA Linux Linux affected 981f95a571e3ca20a496c0b77dbf6b06039c6648 27ff6e8703f7a7160c728501da2f8ef8e7bb6b2f git Not specified
CNA Linux Linux affected 981f95a571e3ca20a496c0b77dbf6b06039c6648 0121c84adb6a4cd6f7560b5895bd88f9899bbc1f git Not specified
CNA Linux Linux affected 981f95a571e3ca20a496c0b77dbf6b06039c6648 5ac6019cb78e98c9608fda72726b36ddf8474dd7 git Not specified
CNA Linux Linux affected 981f95a571e3ca20a496c0b77dbf6b06039c6648 3831568792af75b6523fa93bb91560e29189cf55 git Not specified
CNA Linux Linux affected 6.5 Not specified
CNA Linux Linux unaffected 6.5 semver Not specified
CNA Linux Linux unaffected 6.6.160 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.114 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/5ac6019cb78e98c9608fda72726b36ddf8474dd7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3831568792af75b6523fa93bb91560e29189cf55 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0121c84adb6a4cd6f7560b5895bd88f9899bbc1f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/27ff6e8703f7a7160c728501da2f8ef8e7bb6b2f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7f97c762b5f6e0005c5c7d040ded73bf7fb3587e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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