{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64297", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.778Z", "datePublished": "2026-07-25T08:49:34.486Z", "dateUpdated": "2026-07-25T08:49:34.486Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:49:34.486Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmodule: decompress: check return value of module_extend_max_pages()\n\nmodule_extend_max_pages() calls kvrealloc() internally and returns\n-ENOMEM on allocation failure. The return value is never checked.\n\nIf the initial allocation fails, info->pages remains NULL and\ninfo->max_pages remains 0. Subsequent calls to module_get_next_page()\nwill attempt to dynamically grow the array by calling\nmodule_extend_max_pages(info, 0) since info->used_pages is 0. This\nresults in kvrealloc(NULL, 0) returning ZERO_SIZE_PTR, which is treated\nas a success, leading to a dereference of ZERO_SIZE_PTR and a kernel\noops.\n\nFix: add the missing error check after module_extend_max_pages() and\nreturn immediately on failure. This matches the pattern used by every\nother kvrealloc() caller in the module loading path.\n\n[Sami: Corrected the analysis in the commit message.]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/module/decompress.c"], "versions": [{"version": "b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7", "lessThan": "e7f174715f9f0cbcb9e87b52e4fc4ef149baac98", "status": "affected", "versionType": "git"}, {"version": "b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7", "lessThan": "afcc0515bbdd28d509a2b5870faaa89b137f5d53", "status": "affected", "versionType": "git"}, {"version": "b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7", "lessThan": "168072baf9ad516d5a06046514c7fea4c0671990", "status": "affected", "versionType": "git"}, {"version": "b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7", "lessThan": "a82e170637e050a803b4f37542371ef216bf66d2", "status": "affected", "versionType": "git"}, {"version": "b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7", "lessThan": "e7da02659c229f73492fb1ed87ceda4090153aaa", "status": "affected", "versionType": "git"}, {"version": "b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7", "lessThan": "786d2d84416a9a1c1a47b71a68d679d886284be2", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/module/decompress.c"], "versions": [{"version": "5.17", "status": "affected"}, {"version": "0", "lessThan": "5.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "7.2-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e7f174715f9f0cbcb9e87b52e4fc4ef149baac98"}, {"url": "https://git.kernel.org/stable/c/afcc0515bbdd28d509a2b5870faaa89b137f5d53"}, {"url": "https://git.kernel.org/stable/c/168072baf9ad516d5a06046514c7fea4c0671990"}, {"url": "https://git.kernel.org/stable/c/a82e170637e050a803b4f37542371ef216bf66d2"}, {"url": "https://git.kernel.org/stable/c/e7da02659c229f73492fb1ed87ceda4090153aaa"}, {"url": "https://git.kernel.org/stable/c/786d2d84416a9a1c1a47b71a68d679d886284be2"}], "title": "module: decompress: check return value of module_extend_max_pages()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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