CVE-2026-53344

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53344", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.399Z", "datePublished": "2026-07-01T13:32:24.546Z", "dateUpdated": "2026-07-01T13:32:24.546Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-01T13:32:24.546Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npinctrl: mcp23s08: Initialize mcp->dev and mcp->addr before regmap init\n\nRegmap initialization triggers regcache_maple_populate() which attempts\nSPI read to populate cache. SPI read requires mcp->dev and mcp->addr to\nbe set, without them, NULL pointer dereference occurs during probe.\n\nMove initialization before mcp23s08_spi_regmap_init() call."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/pinctrl/pinctrl-mcp23s08_spi.c"], "versions": [{"version": "f9f4fda15e720686f1b2b436591ab11255e4e85e", "lessThan": "3a13bb9540dfd7014c5601608afcbbadbbcfd673", "status": "affected", "versionType": "git"}, {"version": "f9f4fda15e720686f1b2b436591ab11255e4e85e", "lessThan": "8473c3a197b57ff01396f7a2ec6ddf65383820d4", "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/pinctrl-mcp23s08_spi.c"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.13", "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": "6.19", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3a13bb9540dfd7014c5601608afcbbadbbcfd673"}, {"url": "https://git.kernel.org/stable/c/8473c3a197b57ff01396f7a2ec6ddf65383820d4"}], "title": "pinctrl: mcp23s08: Initialize mcp->dev and mcp->addr before regmap init", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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{"bugzilla": {"description": "kernel: pinctrl: mcp23s08: Initialize mcp->dev and mcp->addr before regmap init", "id": "2495936", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2495936"}, "csaw": false, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's `pinctrl: mcp23s08` driver. During the initialization of the `regmap` (register map) for the `mcp23s08` component, an attempt to perform an SPI (Serial Peripheral Interface) read occurs before critical device parameters (`mcp->dev` and `mcp->addr`) are properly set. This premature access leads to a NULL pointer dereference, which can cause a system crash and result in a Denial of Service (DoS)."], "name": "CVE-2026-53344", "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": "2026-07-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53344\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53344\nhttps://lore.kernel.org/linux-cve-announce/2026070145-CVE-2026-53344-231c@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f9f4fda15e720686f1b2b436591ab11255e4e85e,3a13bb9540dfd7014c5601608afcbbadbbcfd673)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f9f4fda15e720686f1b2b436591ab11255e4e85e,8473c3a197b57ff01396f7a2ec6ddf65383820d4)"}}], "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": "6.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.13,7.1.0)"}}, {"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": "2026-07-01T17:00:05.910613+00:00", "updated": "2026-08-12T10:00:01.838079+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}