CVE-2026-74458

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A nonzero command shorter than CMD_HEADER_LEN can still be\ndispatched, and the wait path copies a matching command into a fixed\ncaller-owned struct kvaser_cmd using the device-provided length.\n\nReject nonzero commands that do not contain the fixed header or that\nextend beyond the current USB buffer item. In the wait path, also reject\na matching command that exceeds the destination before copying it."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c"], "versions": [{"version": "080f40a6fa28dab299da7a652e444b1e2d9231e7", "lessThan": "c00ec53d7dec08134e97071850cc00ef000c5b77", "status": "affected", "versionType": "git"}, {"version": "080f40a6fa28dab299da7a652e444b1e2d9231e7", "lessThan": "d9e91672526ffa279709b15490118aea1bdee714", "status": "affected", "versionType": "git"}, {"version": "080f40a6fa28dab299da7a652e444b1e2d9231e7", "lessThan": "72f96c2942f11a0ae8663adcb3d9ee986e07d4fa", "status": "affected", "versionType": "git"}, {"version": "080f40a6fa28dab299da7a652e444b1e2d9231e7", "lessThan": "695aea154bb2d453e6daada1510972fafd075285", "status": "affected", "versionType": "git"}, {"version": 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A nonzero command shorter than CMD_HEADER_LEN can still be\ndispatched, and the wait path copies a matching command into a fixed\ncaller-owned struct kvaser_cmd using the device-provided length.\n\nReject nonzero commands that do not contain the fixed header or that\nextend beyond the current USB buffer item. 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A nonzero command shorter than CMD_HEADER_LEN can still be\ndispatched, and the wait path copies a matching command into a fixed\ncaller-owned struct kvaser_cmd using the device-provided length.\n\nReject nonzero commands that do not contain the fixed header or that\nextend beyond the current USB buffer item. In the wait path, also reject\na matching command that exceeds the destination before copying it."}], "id": "CVE-2026-74458", "lastModified": "2026-11-06T17:19:48.777", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-74458", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:57:40.922454Z", "version": "2.0.3"}}]}, "published": "2026-08-15T13:17:50.437", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0293dd153f9dbc1ddf5dacdccc76b363bce4a8ee"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/185cb1fa38142a3cbf223dd8b3abb24217f330d3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/21f0465fd86d77794aaed8e05f833634f68d178d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3d0897ec623e422695d70d80ae456f89476c5328"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/695aea154bb2d453e6daada1510972fafd075285"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/72f96c2942f11a0ae8663adcb3d9ee986e07d4fa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c00ec53d7dec08134e97071850cc00ef000c5b77"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d9e91672526ffa279709b15490118aea1bdee714"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command extents", "id": "2517049", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517049"}, "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-120", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncan: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command extents\nThe wait and bulk receive paths walk variable-length commands from a\nUSB buffer. A nonzero command shorter than CMD_HEADER_LEN can still be\ndispatched, and the wait path copies a matching command into a fixed\ncaller-owned struct kvaser_cmd using the device-provided length.\nReject nonzero commands that do not contain the fixed header or that\nextend beyond the current USB buffer item. In the wait path, also reject\na matching command that exceeds the destination before copying it.", "A flaw was found in the Kvaser USB CAN driver (`kvaser_usb_leaf`) in the Linux kernel. This vulnerability occurs due to insufficient validation of received command lengths from a USB buffer. A malicious or malformed command shorter than the expected header length, or one that exceeds the destination buffer, can be processed. This could lead to a buffer overflow, potentially causing a denial of service or other system instability."], "name": "CVE-2026-74458", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74458\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74458\nhttps://lore.kernel.org/linux-cve-announce/2026081532-CVE-2026-74458-d4a5@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[080f40a6fa28dab299da7a652e444b1e2d9231e7,695aea154bb2d453e6daada1510972fafd075285)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[080f40a6fa28dab299da7a652e444b1e2d9231e7,3d0897ec623e422695d70d80ae456f89476c5328)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[080f40a6fa28dab299da7a652e444b1e2d9231e7,185cb1fa38142a3cbf223dd8b3abb24217f330d3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[080f40a6fa28dab299da7a652e444b1e2d9231e7,21f0465fd86d77794aaed8e05f833634f68d178d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[080f40a6fa28dab299da7a652e444b1e2d9231e7,0293dd153f9dbc1ddf5dacdccc76b363bce4a8ee)"}}], "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": "3.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.151,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.103,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.44,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.8,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc6,*]"}}], "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": "2026-08-15T14:30:10.512887+00:00", "updated": "2026-08-21T23:45:03.446021+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}