{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64559", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.796Z", "datePublished": "2026-07-29T16:31:22.195Z", "dateUpdated": "2026-07-30T06:06:50.520Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-30T06:06:50.520Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/pkey: Check length in PKEY_VERIFYPROTK ioctl\n\nExplicitly check the buffer length request structure provided by\nuser-space and fail, if it exceeds the buffer size."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/s390/crypto/pkey_api.c"], "versions": [{"version": "8fcc231ce3bea12b78bb94b280cdc03cff342435", "lessThan": "0a9e34ccbe772b8f321388cdbdf4f22b94e513e7", "status": "affected", "versionType": "git"}, {"version": "8fcc231ce3bea12b78bb94b280cdc03cff342435", "lessThan": "693bf91d4db134f9b1c2840c8e287eee3d993bac", "status": "affected", "versionType": "git"}, {"version": "8fcc231ce3bea12b78bb94b280cdc03cff342435", "lessThan": "7e7e03848c918aa0acad5ffd75d929e3afec1554", "status": "affected", "versionType": "git"}, {"version": "8fcc231ce3bea12b78bb94b280cdc03cff342435", "lessThan": "b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/s390/crypto/pkey_api.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "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": "6.12", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.2-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0a9e34ccbe772b8f321388cdbdf4f22b94e513e7"}, {"url": "https://git.kernel.org/stable/c/693bf91d4db134f9b1c2840c8e287eee3d993bac"}, {"url": "https://git.kernel.org/stable/c/7e7e03848c918aa0acad5ffd75d929e3afec1554"}, {"url": "https://git.kernel.org/stable/c/b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970"}], "title": "s390/pkey: Check length in PKEY_VERIFYPROTK ioctl", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: s390/pkey: Check length in PKEY_VERIFYPROTK ioctl", "id": "2508488", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2508488"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-805", "details": ["A flaw was found in the Linux kernel. A missing buffer length check in the `PKEY_VERIFYPROTK ioctl` within the `s390/pkey` module allows a local attacker to provide a buffer length request that exceeds the allocated buffer size. This could lead to information disclosure by reading out-of-bounds memory or a denial of service by crashing the system."], "name": "CVE-2026-64559", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64559\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64559\nhttps://lore.kernel.org/linux-cve-announce/2026072914-CVE-2026-64559-839b@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8fcc231ce3bea12b78bb94b280cdc03cff342435,0a9e34ccbe772b8f321388cdbdf4f22b94e513e7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8fcc231ce3bea12b78bb94b280cdc03cff342435,693bf91d4db134f9b1c2840c8e287eee3d993bac)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8fcc231ce3bea12b78bb94b280cdc03cff342435,7e7e03848c918aa0acad5ffd75d929e3afec1554)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8fcc231ce3bea12b78bb94b280cdc03cff342435,b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970)"}}], "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": "6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"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": "2026-07-29T17:30:04.078973+00:00", "updated": "2026-08-02T08:00:04.658177+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}