CVE-2026-64521

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64521", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.794Z", "datePublished": "2026-07-25T09:14:46.709Z", "dateUpdated": "2026-07-25T09:14:46.709Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T09:14:46.709Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npinctrl: meson: amlogic-a4: fix deadlock issue\n\nAccessing the pinconf-pins sysfs node may deadlock.\n\npinconf_pins_show() holds pctldev->mutex, and the platform driver\ncalls pinctrl_find_gpio_range_from_pin(), which tries to acquire\nthe same mutex again, leading to a deadlock.\n\nUse pinctrl_find_gpio_range_from_pin_nolock() to fix this issue."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/pinctrl/meson/pinctrl-amlogic-a4.c"], "versions": [{"version": "6e9be3abb78c2f6c97a51070004a5165702f0ed9", "lessThan": "e917713f013423069782ff554935c7a5d4266783", "status": "affected", "versionType": "git"}, {"version": "6e9be3abb78c2f6c97a51070004a5165702f0ed9", "lessThan": "744ac926c0e55267a10b49b5b72582afef4ad49f", "status": "affected", "versionType": "git"}, {"version": "6e9be3abb78c2f6c97a51070004a5165702f0ed9", "lessThan": "e72ce029810390eb987a036fb2c8a5da9a23b685", "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/pinctrl/meson/pinctrl-amlogic-a4.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.15", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e917713f013423069782ff554935c7a5d4266783"}, {"url": "https://git.kernel.org/stable/c/744ac926c0e55267a10b49b5b72582afef4ad49f"}, {"url": "https://git.kernel.org/stable/c/e72ce029810390eb987a036fb2c8a5da9a23b685"}], "title": "pinctrl: meson: amlogic-a4: fix deadlock issue", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/pinctrl/meson/pinctrl-amlogic-a4.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e917713f013423069782ff554935c7a5d4266783", "status": "affected", "version": "6e9be3abb78c2f6c97a51070004a5165702f0ed9", "versionType": "git"}, {"lessThan": "744ac926c0e55267a10b49b5b72582afef4ad49f", "status": "affected", "version": "6e9be3abb78c2f6c97a51070004a5165702f0ed9", "versionType": "git"}, {"lessThan": "e72ce029810390eb987a036fb2c8a5da9a23b685", "status": "affected", "version": "6e9be3abb78c2f6c97a51070004a5165702f0ed9", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/pinctrl/meson/pinctrl-amlogic-a4.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"lessThan": "6.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.34", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npinctrl: meson: amlogic-a4: fix deadlock issue\n\nAccessing the pinconf-pins sysfs node may deadlock.\n\npinconf_pins_show() holds pctldev->mutex, and the platform driver\ncalls pinctrl_find_gpio_range_from_pin(), which tries to acquire\nthe same mutex again, leading to a deadlock.\n\nUse pinctrl_find_gpio_range_from_pin_nolock() to fix this issue."}], "id": "CVE-2026-64521", "lastModified": "2026-11-03T18:15:39.353", "metrics": {}, "published": "2026-07-25T10:17:38.393", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/744ac926c0e55267a10b49b5b72582afef4ad49f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e72ce029810390eb987a036fb2c8a5da9a23b685"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e917713f013423069782ff554935c7a5d4266783"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: pinctrl: meson: amlogic-a4: fix deadlock issue", "id": "2507067", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507067"}, "csaw": false, "cwe": "CWE-764", "details": ["A flaw was found in the Linux kernel's pinctrl subsystem for Amlogic A4 devices. A local attacker could trigger a deadlock by accessing the `pinconf-pins` sysfs node. This occurs because the `pinconf_pins_show()` function attempts to acquire a mutex that is already held, leading to a system freeze or unresponsiveness. This vulnerability can result in a denial of service."], "name": "CVE-2026-64521", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "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-2026-64521\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64521\nhttps://lore.kernel.org/linux-cve-announce/2026072538-CVE-2026-64521-9fe3@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6e9be3abb78c2f6c97a51070004a5165702f0ed9,e917713f013423069782ff554935c7a5d4266783)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6e9be3abb78c2f6c97a51070004a5165702f0ed9,744ac926c0e55267a10b49b5b72582afef4ad49f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6e9be3abb78c2f6c97a51070004a5165702f0ed9,e72ce029810390eb987a036fb2c8a5da9a23b685)"}}], "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": "generic", "value": "6.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.34,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.11,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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": "2026-07-26T01:15:16.975571+00:00", "updated": "2026-08-03T18:30:06.633493+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}