{"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": "2026-08-17T04:52:54.883Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:52:54.883Z"}, "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", "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"}]}]}], "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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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.]"}], "id": "CVE-2026-64297", "lastModified": "2026-08-17T05:17:29.367", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-07-25T10:17:10.530", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/168072baf9ad516d5a06046514c7fea4c0671990"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/786d2d84416a9a1c1a47b71a68d679d886284be2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a82e170637e050a803b4f37542371ef216bf66d2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/afcc0515bbdd28d509a2b5870faaa89b137f5d53"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e7da02659c229f73492fb1ed87ceda4090153aaa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e7f174715f9f0cbcb9e87b52e4fc4ef149baac98"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: module: decompress: check return value of module_extend_max_pages()", "id": "2507239", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507239"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel. An unchecked return value in the `module_extend_max_pages()` function within the module decompression logic can lead to a null pointer dereference. This vulnerability can be triggered if memory allocation fails during module loading, resulting in a kernel oops. This can allow a local attacker to cause a denial of service (DoS) by crashing the system."], "name": "CVE-2026-64297", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64297\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64297\nhttps://lore.kernel.org/linux-cve-announce/2026072506-CVE-2026-64297-5945@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7,e7f174715f9f0cbcb9e87b52e4fc4ef149baac98)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7,afcc0515bbdd28d509a2b5870faaa89b137f5d53)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7,168072baf9ad516d5a06046514c7fea4c0671990)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7,a82e170637e050a803b4f37542371ef216bf66d2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7,e7da02659c229f73492fb1ed87ceda4090153aaa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7,786d2d84416a9a1c1a47b71a68d679d886284be2)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.96,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-25T12:00:11.860420+00:00", "updated": "2026-08-03T19:30:04.395009+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}