module: decompress: check return value of module_extend_max_pages()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64297
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:10 UTC
Updated2026-08-17 05:17:29 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: module: decompress: check return value of module_extend_max_pages() module_extend_max_pages() calls kvrealloc() internally and returns -ENOMEM on allocation failure. The return value is never checked. If the initial allocation fails, info->pages remains NULL and info->max_pages remains 0. Subsequent calls to module_get_next_page() will attempt to dynamically grow the array by calling module_extend_max_pages(info, 0) since info->used_pages is 0. This results in kvrealloc(NULL, 0) returning ZERO_SIZE_PTR, which is treated as a success, leading to a dereference of ZERO_SIZE_PTR and a kernel oops. Fix: add the missing error check after module_extend_max_pages() and return immediately on failure. This matches the pattern used by every other kvrealloc() caller in the module loading path. [Sami: Corrected the analysis in the commit message.]

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

EPSS: 0.002060000 probability, percentile 0.107990000 (date 2026-08-03)

Problem Types: CWE-476

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 b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7 e7f174715f9f0cbcb9e87b52e4fc4ef149baac98 git Not specified
CNA Linux Linux affected b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7 afcc0515bbdd28d509a2b5870faaa89b137f5d53 git Not specified
CNA Linux Linux affected b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7 168072baf9ad516d5a06046514c7fea4c0671990 git Not specified
CNA Linux Linux affected b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7 a82e170637e050a803b4f37542371ef216bf66d2 git Not specified
CNA Linux Linux affected b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7 e7da02659c229f73492fb1ed87ceda4090153aaa git Not specified
CNA Linux Linux affected b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7 786d2d84416a9a1c1a47b71a68d679d886284be2 git Not specified
CNA Linux Linux affected 5.17 Not specified
CNA Linux Linux unaffected 5.17 semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.96 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.39 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/786d2d84416a9a1c1a47b71a68d679d886284be2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/afcc0515bbdd28d509a2b5870faaa89b137f5d53 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a82e170637e050a803b4f37542371ef216bf66d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e7da02659c229f73492fb1ed87ceda4090153aaa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/168072baf9ad516d5a06046514c7fea4c0671990 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e7f174715f9f0cbcb9e87b52e4fc4ef149baac98 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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