{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-53840", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-09T01:27:17.826Z", "datePublished": "2025-12-09T01:29:56.848Z", "dateUpdated": "2026-05-11T19:52:32.046Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:52:32.046Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: early: xhci-dbc: Fix a potential out-of-bound memory access\n\nIf xdbc_bulk_write() fails, the values in 'buf' can be anything. So the\nstring is not guaranteed to be NULL terminated when xdbc_trace() is called.\n\nReserve an extra byte, which will be zeroed automatically because 'buf' is\na static variable, in order to avoid troubles, should it happen."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/early/xhci-dbc.c"], "versions": [{"version": "aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0", "lessThan": "e8fb0f13e45cf361fd06593d3cb2d89915cd3bd0", "status": "affected", "versionType": "git"}, {"version": "aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0", "lessThan": "351c8d8650d1ccc006255fa01f98b6c6496a02e5", "status": "affected", "versionType": "git"}, {"version": "aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0", "lessThan": "df7c8aba7309f4dc55df94e06b67f576c0f52406", "status": "affected", "versionType": "git"}, {"version": "aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0", "lessThan": "a4a97ab3db5c081eb6e7dba91306adefb461e0bd", "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/usb/early/xhci-dbc.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.99", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.16", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2.3", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.3", "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": "4.12", "versionEndExcluding": "5.15.99"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.1.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.2.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e8fb0f13e45cf361fd06593d3cb2d89915cd3bd0"}, {"url": "https://git.kernel.org/stable/c/351c8d8650d1ccc006255fa01f98b6c6496a02e5"}, {"url": "https://git.kernel.org/stable/c/df7c8aba7309f4dc55df94e06b67f576c0f52406"}, {"url": "https://git.kernel.org/stable/c/a4a97ab3db5c081eb6e7dba91306adefb461e0bd"}], "title": "usb: early: xhci-dbc: Fix a potential out-of-bound memory access", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: early: xhci-dbc: Fix a potential out-of-bound memory access\n\nIf xdbc_bulk_write() fails, the values in 'buf' can be anything. So the\nstring is not guaranteed to be NULL terminated when xdbc_trace() is called.\n\nReserve an extra byte, which will be zeroed automatically because 'buf' is\na static variable, in order to avoid troubles, should it happen."}], "id": "CVE-2023-53840", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2025-12-09T16:17:23.667", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/351c8d8650d1ccc006255fa01f98b6c6496a02e5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a4a97ab3db5c081eb6e7dba91306adefb461e0bd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/df7c8aba7309f4dc55df94e06b67f576c0f52406"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e8fb0f13e45cf361fd06593d3cb2d89915cd3bd0"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: usb: early: xhci-dbc: Fix a potential out-of-bound memory access", "id": "2420348", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2420348"}, "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"}, "details": ["No description is available for this CVE."], "name": "CVE-2023-53840", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "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": "2025-12-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53840\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53840\nhttps://lore.kernel.org/linux-cve-announce/2025120957-CVE-2023-53840-797d@gregkh/T"], "threat_severity": "Important"}

{}