erofs: add GFP_NOIO in the bio completion if needed

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Summary

CVECVE-2026-31467
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-22 14:16:42 UTC
Updated2026-05-07 18:21:40 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: erofs: add GFP_NOIO in the bio completion if needed The bio completion path in the process context (e.g. dm-verity) will directly call into decompression rather than trigger another workqueue context for minimal scheduling latencies, which can then call vm_map_ram() with GFP_KERNEL. Due to insufficient memory, vm_map_ram() may generate memory swapping I/O, which can cause submit_bio_wait to deadlock in some scenarios. Trimmed down the call stack, as follows: f2fs_submit_read_io submit_bio //bio_list is initialized. mmc_blk_mq_recovery z_erofs_endio vm_map_ram __pte_alloc_kernel __alloc_pages_direct_reclaim shrink_folio_list __swap_writepage submit_bio_wait //bio_list is non-NULL, hang!!! Use memalloc_noio_{save,restore}() to wrap up this path.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.000240000 probability, percentile 0.067850000 (date 2026-04-27)

Problem Types: CWE-667

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:N/AC:L/PR:N/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 648f2de053a882c87c05f0060f47d3b11841fdbe d6565ea662e17d45a577184b0011bd69de22dc2b git Not specified
CNA Linux Linux affected 648f2de053a882c87c05f0060f47d3b11841fdbe d9d8360cb66e3b599d89d2526e7da8b530ebf2ff git Not specified
CNA Linux Linux affected 648f2de053a882c87c05f0060f47d3b11841fdbe 5c8ecdcfbfb0b0c6a82a4ebadc1ddea61609b902 git Not specified
CNA Linux Linux affected 648f2de053a882c87c05f0060f47d3b11841fdbe 378949f46e897204384f3f5f91e42e93e3f87568 git Not specified
CNA Linux Linux affected 648f2de053a882c87c05f0060f47d3b11841fdbe da40464064599eefe78749f75cd2bba371044c04 git Not specified
CNA Linux Linux affected 648f2de053a882c87c05f0060f47d3b11841fdbe e83e20b82859f0588e9a52a6fa9fea704a2061cf git Not specified
CNA Linux Linux affected 648f2de053a882c87c05f0060f47d3b11841fdbe c23df30915f83e7257c8625b690a1cece94142a0 git Not specified
CNA Linux Linux affected 5.13 Not specified
CNA Linux Linux unaffected 5.13 semver Not specified
CNA Linux Linux unaffected 5.15.203 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.168 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.131 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.80 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.21 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.11 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d9d8360cb66e3b599d89d2526e7da8b530ebf2ff 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5c8ecdcfbfb0b0c6a82a4ebadc1ddea61609b902 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d6565ea662e17d45a577184b0011bd69de22dc2b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c23df30915f83e7257c8625b690a1cece94142a0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/378949f46e897204384f3f5f91e42e93e3f87568 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/da40464064599eefe78749f75cd2bba371044c04 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e83e20b82859f0588e9a52a6fa9fea704a2061cf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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