{"id":"CVE-2026-64297","state":"PUBLISHED","title":"module: decompress: check return value of module_extend_max_pages()","description":"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.]","publishedAt":"2026-07-25T08:49:34.486Z","updatedAt":"2026-08-17T04:52:54.883Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7","status":"affected","lessThan":"e7f174715f9f0cbcb9e87b52e4fc4ef149baac98","versionType":"git"},{"version":"b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7","status":"affected","lessThan":"afcc0515bbdd28d509a2b5870faaa89b137f5d53","versionType":"git"},{"version":"b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7","status":"affected","lessThan":"168072baf9ad516d5a06046514c7fea4c0671990","versionType":"git"},{"version":"b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7","status":"affected","lessThan":"a82e170637e050a803b4f37542371ef216bf66d2","versionType":"git"},{"version":"b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7","status":"affected","lessThan":"e7da02659c229f73492fb1ed87ceda4090153aaa","versionType":"git"},{"version":"b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7","status":"affected","lessThan":"786d2d84416a9a1c1a47b71a68d679d886284be2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/module/decompress.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/module/decompress.c"]}],"references":["https://git.kernel.org/stable/c/e7f174715f9f0cbcb9e87b52e4fc4ef149baac98","https://git.kernel.org/stable/c/afcc0515bbdd28d509a2b5870faaa89b137f5d53","https://git.kernel.org/stable/c/168072baf9ad516d5a06046514c7fea4c0671990","https://git.kernel.org/stable/c/a82e170637e050a803b4f37542371ef216bf66d2","https://git.kernel.org/stable/c/e7da02659c229f73492fb1ed87ceda4090153aaa","https://git.kernel.org/stable/c/786d2d84416a9a1c1a47b71a68d679d886284be2"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64297.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64297","state":"PUBLISHED","datePublished":"2026-07-25T08:49:34.486Z","dateUpdated":"2026-08-17T04:52:54.883Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.778Z"},"containers":{"cna":{"title":"module: decompress: check return value of module_extend_max_pages()","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":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7","status":"affected","lessThan":"e7f174715f9f0cbcb9e87b52e4fc4ef149baac98","versionType":"git"},{"version":"b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7","status":"affected","lessThan":"afcc0515bbdd28d509a2b5870faaa89b137f5d53","versionType":"git"},{"version":"b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7","status":"affected","lessThan":"168072baf9ad516d5a06046514c7fea4c0671990","versionType":"git"},{"version":"b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7","status":"affected","lessThan":"a82e170637e050a803b4f37542371ef216bf66d2","versionType":"git"},{"version":"b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7","status":"affected","lessThan":"e7da02659c229f73492fb1ed87ceda4090153aaa","versionType":"git"},{"version":"b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7","status":"affected","lessThan":"786d2d84416a9a1c1a47b71a68d679d886284be2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/module/decompress.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/module/decompress.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:52:54.883Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}