{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74585", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.918Z", "datePublished": "2026-08-22T15:31:38.339Z", "dateUpdated": "2026-08-22T15:31:38.339Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-22T15:31:38.339Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Bound the DROM dual link port number before indexing sw->ports\n\ntb_drom_parse_entry_port() validates the device-supplied header->index\nagainst sw->config.max_port_number before indexing sw->ports[], but the\nsibling field entry->dual_link_port_nr -- a 6-bit value also read from\nthe DROM -- indexes the same array with no such check. A malicious or\nmalformed Thunderbolt device can set dual_link_port_nr beyond the\nallocated sw->ports[] (max_port_number + 1 entries), producing an\nout-of-bounds tb_port pointer that is stored and later dereferenced.\n\nReject a port entry whose dual_link_port_nr exceeds max_port_number,\nthe same bound already applied to header->index."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/thunderbolt/eeprom.c"], "versions": [{"version": "cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6", "lessThan": "6c892ed9f4129ae40ef0f92e1bb31aa0b0ddc72c", "status": "affected", "versionType": "git"}, {"version": "cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6", "lessThan": "3d3c212b70633332ab71672aa2bc6af257d2ec83", "status": "affected", "versionType": "git"}, {"version": "cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6", "lessThan": "b98e1e28bd95b0fa33164eec1e763d26c7058b39", 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/thunderbolt/eeprom.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6c892ed9f4129ae40ef0f92e1bb31aa0b0ddc72c", "status": "affected", "version": "cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6", "versionType": "git"}, {"lessThan": "3d3c212b70633332ab71672aa2bc6af257d2ec83", "status": "affected", "version": "cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6", "versionType": "git"}, {"lessThan": "b98e1e28bd95b0fa33164eec1e763d26c7058b39", "status": "affected", "version": "cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6", "versionType": "git"}, {"lessThan": "50f0c8dd8c3390f851cfb97ca13116f9ee6469d1", "status": "affected", "version": "cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6", "versionType": "git"}, {"lessThan": "f28066057134aa9294caa597b670daf505ad9dce", "status": "affected", "version": "cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6", "versionType": "git"}, {"lessThan": "40d2ffb74094cf36edbe05855566a4c58b6ce808", "status": "affected", "version": "cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6", "versionType": "git"}, {"lessThan": "f32c3a9a77cfb50934a60b05d5407649af062535", "status": "affected", "version": "cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6", "versionType": "git"}, {"lessThan": "d6764992f17b23d91ff93ce905ab53c2aa7191f0", "status": "affected", "version": "cd22e73bdf5eff7e68a0f8bdfbce123ad43651f6", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/thunderbolt/eeprom.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.17"}, {"lessThan": "3.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.265", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.216", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.183", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.152", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.104", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.45", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\nthunderbolt: Bound the DROM dual link port number before indexing sw->ports\n\ntb_drom_parse_entry_port() validates the device-supplied header->index\nagainst sw->config.max_port_number before indexing sw->ports[], but the\nsibling field entry->dual_link_port_nr -- a 6-bit value also read from\nthe DROM -- indexes the same array with no such check. A malicious or\nmalformed Thunderbolt device can set dual_link_port_nr beyond the\nallocated sw->ports[] (max_port_number + 1 entries), producing an\nout-of-bounds tb_port pointer that is stored and later dereferenced.\n\nReject a port entry whose dual_link_port_nr exceeds max_port_number,\nthe same bound already applied to header->index."}], "id": "CVE-2026-74585", "lastModified": "2026-08-22T16:16:30.560", "metrics": {}, "published": "2026-08-22T16:16:30.560", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3d3c212b70633332ab71672aa2bc6af257d2ec83"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/40d2ffb74094cf36edbe05855566a4c58b6ce808"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/50f0c8dd8c3390f851cfb97ca13116f9ee6469d1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6c892ed9f4129ae40ef0f92e1bb31aa0b0ddc72c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b98e1e28bd95b0fa33164eec1e763d26c7058b39"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d6764992f17b23d91ff93ce905ab53c2aa7191f0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f28066057134aa9294caa597b670daf505ad9dce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f32c3a9a77cfb50934a60b05d5407649af062535"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: thunderbolt: Bound the DROM dual link port number before indexing sw->ports", "id": "2521399", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521399"}, "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-823", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nthunderbolt: Bound the DROM dual link port number before indexing sw->ports\ntb_drom_parse_entry_port() validates the device-supplied header->index\nagainst sw->config.max_port_number before indexing sw->ports[], but the\nsibling field entry->dual_link_port_nr -- a 6-bit value also read from\nthe DROM -- indexes the same array with no such check. A malicious or\nmalformed Thunderbolt device can set dual_link_port_nr beyond the\nallocated sw->ports[] (max_port_number + 1 entries), producing an\nout-of-bounds tb_port pointer that is stored and later dereferenced.\nReject a port entry whose dual_link_port_nr exceeds max_port_number,\nthe same bound already applied to header->index.", "A flaw was found in the Linux kernel's Thunderbolt driver. A malicious or malformed Thunderbolt device can provide an invalid port number, leading to an out-of-bounds memory access. This can result in memory corruption and potentially lead to a denial of service or other unspecified impacts."], "name": "CVE-2026-74585", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "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": "2026-08-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74585\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74585\nhttps://lore.kernel.org/linux-cve-announce/2026082209-CVE-2026-74585-8fe6@gregkh/T"], "threat_severity": "Moderate"}

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