io_uring/zcrx: fix sgtable leak on mapping failures

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Summary

CVECVE-2026-43224
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-06 12:16:42 UTC
Updated2026-05-08 21:13:21 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: io_uring/zcrx: fix sgtable leak on mapping failures In an unlikely case when io_populate_area_dma() fails, which could only happen on a PAGE_POOL_32BIT_ARCH_WITH_64BIT_DMA machine, io_zcrx_map_area() will have an initialised and not freed table. It was supposed to be cleaned up in the error path, but !is_mapped prevents that.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

Problem Types: CWE-401

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 439a98b972fbb1991819b5367f482cd4161ba39c f1ae403324311e143ef20e53cf9a5f01e312f7c9 git Not specified
CNA Linux Linux affected 439a98b972fbb1991819b5367f482cd4161ba39c ef075c1464ac9047e2cf7d23cb020bfd0b8e4b60 git Not specified
CNA Linux Linux affected 439a98b972fbb1991819b5367f482cd4161ba39c a983aae397767e9da931128ff2b5bf9066513ce3 git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.16 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.6 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f1ae403324311e143ef20e53cf9a5f01e312f7c9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ef075c1464ac9047e2cf7d23cb020bfd0b8e4b60 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a983aae397767e9da931128ff2b5bf9066513ce3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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