CVE-2023-52887

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This provides clearer error\nmessages and allows for the early termination of problematic sessions.\nPreviously, sessions were only released at the end of j1939_xtp_rx_rts().\n\nPotentially this could be reproduced with something like:\ntestj1939 -r vcan0:0x80 &\nwhile true; do\n\t# send first RTS\n\tcansend vcan0 18EC8090#1014000303002301;\n\t# send second RTS\n\tcansend vcan0 18EC8090#1014000303002301;\n\t# send abort\n\tcansend vcan0 18EC8090#ff00000000002301;\ndone"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable code is reached by received SAE J1939 TP.CM RTS frames via can_rcv \u2192 j1939_can_recv \u2192 j1939_tp_recv \u2192 j1939_xtp_rx_rts \u2192 j1939_xtp_rx_rts_session_new. An unauthenticated CAN/J1939 peer can trigger it without local code execution on the target, consistent with other packet-triggered j1939 scores.\nAC:L - The attacker reliably triggers the bug by sending tightly spaced duplicate RTS (and abort) frames, as in the documented cansend reproducer; the attacker fully controls packet contents and timing.\nPR:N - J1939/CAN receive processing has no authentication gate; once a legitimate J1939 socket is bound on the victim (normal for J1939 deployments), an unauthenticated bus peer can inject the crafted RTS sequence.\nUI:N - No user action is required beyond the target already running the J1939 stack with a bound socket; the attacker only needs to transmit frames.\nS:U - Impact is confined to kernel J1939 session handling within the same kernel security authority and does not cross VM, IOMMU, or sandbox boundaries.\nC:N - The failure path is a WARN_ON_ONCE plus continued use of a never-activated session that is later freed via timer refs; investigation found no info leak, OOB read, or UAF disclosure primitive.\nI:N - No out-of-bounds write, type confusion, or other integrity/write primitive was identified; the ghost session may confuse transport state but does not yield attacker-controlled memory modification.\nA:H - WARN_ON_ONCE in softirq receive context can panic the kernel (e.g. panic_on_warn), and the bug can be retriggered repeatedly by an adjacent/network peer to deny J1939/CAN service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/can/j1939/transport.c"], "versions": [{"version": "9d71dd0c70099914fcd063135da3c580865e924c", "lessThan": "ed581989d7ea9df6f8646beba2341e32cd49a1f9", "status": "affected", "versionType": "git"}, {"version": "9d71dd0c70099914fcd063135da3c580865e924c", "lessThan": "f6c839e717901dbd6b1c1ca807b6210222eb70f6", "status": "affected", "versionType": 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An unauthenticated CAN/J1939 peer can trigger it without local code execution on the target, consistent with other packet-triggered j1939 scores.\nAC:L - The attacker reliably triggers the bug by sending tightly spaced duplicate RTS (and abort) frames, as in the documented cansend reproducer; the attacker fully controls packet contents and timing.\nPR:N - J1939/CAN receive processing has no authentication gate; once a legitimate J1939 socket is bound on the victim (normal for J1939 deployments), an unauthenticated bus peer can inject the crafted RTS sequence.\nUI:N - No user action is required beyond the target already running the J1939 stack with a bound socket; the attacker only needs to transmit frames.\nS:U - Impact is confined to kernel J1939 session handling within the same kernel security authority and does not cross VM, IOMMU, or sandbox boundaries.\nC:N - The failure path is a WARN_ON_ONCE plus continued use of a never-activated session that is later freed via timer refs; investigation found no info leak, OOB read, or UAF disclosure primitive.\nI:N - No out-of-bounds write, type confusion, or other integrity/write primitive was identified; the ghost session may confuse transport state but does not yield attacker-controlled memory modification.\nA:H - WARN_ON_ONCE in softirq receive context can panic the kernel (e.g. panic_on_warn), and the bug can be retriggered repeatedly by an adjacent/network peer to deny J1939/CAN service."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "9d71dd0c70099914fcd063135da3c580865e924c", "lessThan": "ed581989d7ea9df6f8646beba2341e32cd49a1f9", "versionType": "git"}, {"status": "affected", "version": "9d71dd0c70099914fcd063135da3c580865e924c", "lessThan": "f6c839e717901dbd6b1c1ca807b6210222eb70f6", "versionType": "git"}, {"status": "affected", "version": "9d71dd0c70099914fcd063135da3c580865e924c", "lessThan": "1762ca80c2b72dd1b5821c5e347713ae696276ea", "versionType": "git"}, {"status": "affected", "version": "9d71dd0c70099914fcd063135da3c580865e924c", "lessThan": "26b18dd30e63d4fd777be429148e8e4ed66f60b2", "versionType": "git"}, {"status": "affected", "version": "9d71dd0c70099914fcd063135da3c580865e924c", "lessThan": "177e33b655d35d72866b50aec84307119dc5f3d4", "versionType": "git"}, {"status": "affected", "version": "9d71dd0c70099914fcd063135da3c580865e924c", "lessThan": "0bc0a7416ea73f79f915c9a05ac0858dff65cfed", "versionType": "git"}, {"status": "affected", "version": "9d71dd0c70099914fcd063135da3c580865e924c", "lessThan": "d3e2904f71ea0fe7eaff1d68a2b0363c888ea0fb", "versionType": "git"}], "programFiles": ["net/can/j1939/transport.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.4"}, {"status": "unaffected", "version": "0", "lessThan": "5.4", "versionType": "semver"}, {"status": "unaffected", "version": "5.4.279", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.221", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.162", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.97", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.37", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.9.8", "versionType": "semver", "lessThanOrEqual": "6.9.*"}, {"status": "unaffected", "version": "6.10", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/can/j1939/transport.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/ed581989d7ea9df6f8646beba2341e32cd49a1f9"}, {"url": "https://git.kernel.org/stable/c/f6c839e717901dbd6b1c1ca807b6210222eb70f6"}, {"url": "https://git.kernel.org/stable/c/1762ca80c2b72dd1b5821c5e347713ae696276ea"}, {"url": "https://git.kernel.org/stable/c/26b18dd30e63d4fd777be429148e8e4ed66f60b2"}, {"url": "https://git.kernel.org/stable/c/177e33b655d35d72866b50aec84307119dc5f3d4"}, {"url": "https://git.kernel.org/stable/c/0bc0a7416ea73f79f915c9a05ac0858dff65cfed"}, {"url": "https://git.kernel.org/stable/c/d3e2904f71ea0fe7eaff1d68a2b0363c888ea0fb"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: can: j1939: enhanced error handling for tightly received RTS messages in xtp_rx_rts_session_new\n\nThis patch enhances error handling in scenarios with RTS (Request to\nSend) messages arriving closely. 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It replaces the less informative WARN_ON_ONCE\nbacktraces with a new error handling method. This provides clearer error\nmessages and allows for the early termination of problematic sessions.\nPreviously, sessions were only released at the end of j1939_xtp_rx_rts().\n\nPotentially this could be reproduced with something like:\ntestj1939 -r vcan0:0x80 &\nwhile true; do\n\t# send first RTS\n\tcansend vcan0 18EC8090#1014000303002301;\n\t# send second RTS\n\tcansend vcan0 18EC8090#1014000303002301;\n\t# send abort\n\tcansend vcan0 18EC8090#ff00000000002301;\ndone"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: can: j1939: manejo de errores mejorado para mensajes RTS recibidos estrechamente en xtp_rx_rts_session_new Este parche mejora el manejo de errores en escenarios con mensajes RTS (Solicitud de env\u00edo) que llegan cerca. Reemplaza los rastreos WARN_ON_ONCE menos informativos con un nuevo m\u00e9todo de manejo de errores. Esto proporciona mensajes de error m\u00e1s claros y permite la finalizaci\u00f3n anticipada de sesiones problem\u00e1ticas. Anteriormente, las sesiones s\u00f3lo se publicaban al final de j1939_xtp_rx_rts(). Potencialmente, esto podr\u00eda reproducirse con algo como: testj1939 -r vcan0:0x80 & while true; hacer # enviar primero RTS cansend vcan0 18EC8090#1014000303002301; # enviar segundo RTS cansend vcan0 18EC8090#1014000303002301; # enviar cancelar cansend vcan0 18EC8090#ff00000000002301; hecho"}], "id": "CVE-2023-52887", "lastModified": "2026-08-04T10:18:47.980", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-52887", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T16:20:12.491125Z", "version": "2.0.3"}}]}, "published": "2024-07-29T16:15:03.150", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0bc0a7416ea73f79f915c9a05ac0858dff65cfed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1762ca80c2b72dd1b5821c5e347713ae696276ea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/177e33b655d35d72866b50aec84307119dc5f3d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/26b18dd30e63d4fd777be429148e8e4ed66f60b2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d3e2904f71ea0fe7eaff1d68a2b0363c888ea0fb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ed581989d7ea9df6f8646beba2341e32cd49a1f9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f6c839e717901dbd6b1c1ca807b6210222eb70f6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0bc0a7416ea73f79f915c9a05ac0858dff65cfed"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1762ca80c2b72dd1b5821c5e347713ae696276ea"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/177e33b655d35d72866b50aec84307119dc5f3d4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/26b18dd30e63d4fd777be429148e8e4ed66f60b2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d3e2904f71ea0fe7eaff1d68a2b0363c888ea0fb"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ed581989d7ea9df6f8646beba2341e32cd49a1f9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f6c839e717901dbd6b1c1ca807b6210222eb70f6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-617"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net: can: j1939: enhanced error handling for tightly received RTS messages in xtp_rx_rts_session_new", "id": "2300477", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2300477"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-20", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: can: j1939: enhanced error handling for tightly received RTS messages in xtp_rx_rts_session_new\nThis patch enhances error handling in scenarios with RTS (Request to\nSend) messages arriving closely. It replaces the less informative WARN_ON_ONCE\nbacktraces with a new error handling method. This provides clearer error\nmessages and allows for the early termination of problematic sessions.\nPreviously, sessions were only released at the end of j1939_xtp_rx_rts().\nPotentially this could be reproduced with something like:\ntestj1939 -r vcan0:0x80 &\nwhile true; do\n# send first RTS\ncansend vcan0 18EC8090#1014000303002301;\n# send second RTS\ncansend vcan0 18EC8090#1014000303002301;\n# send abort\ncansend vcan0 18EC8090#ff00000000002301;\ndone"], "name": "CVE-2023-52887", "public_date": "2024-07-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52887"], "threat_severity": "Low"}

{"created": "2025-07-12T15:42:34.212319+00:00", "updated": "2025-07-12T15:42:34.212373+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}