CVE-2021-46999

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When processing a\nduplicate COOKIE-ECHO chunk in sctp_sf_do_dupcook_a(), both COOKIE-ACK\nand SHUTDOWN chunks are allocated with the transort from the new asoc.\nHowever, later in the sideeffect machine, the old asoc is used to send\nthem out and old asoc's shutdown_last_sent_to is set to the transport\nthat SHUTDOWN chunk attached to in sctp_cmd_setup_t2(), which actually\nbelongs to the new asoc. After the new_asoc is freed and the old asoc\nT2 timeout, the old asoc's shutdown_last_sent_to that is already freed\nwould be accessed in sctp_sf_t2_timer_expire().\n\nThanks Alexander and Jere for helping dig into this issue.\n\nTo fix it, this patch is to do the asoc update first, then allocate\nthe COOKIE-ACK and SHUTDOWN chunks with the 'updated' old asoc. This\nwould make more sense, as a chunk from an asoc shouldn't be sent out\nwith another asoc. We had fixed quite a few issues caused by this."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The bug is in SCTP COOKIE-ECHO processing on the packet receive path (sctp_rcv \u2192 sctp_sf_do_5_2_4_dupcook \u2192 sctp_sf_do_dupcook_a); a remote peer triggers it by sending SCTP packets over IP.\nAC:L - A peer can observe SHUTDOWN, withhold SHUTDOWN-ACK to keep the victim in SHUTDOWN_SENT, then complete a restart INIT/COOKIE-ECHO exchange; the attacker controls both the timing and the packets that create the UAF.\nPR:N - No local privileges are required\u2014any remote SCTP client that completes a normal association handshake can send the restart COOKIE-ECHO; cookie HMAC is protocol anti-DoS, not OS authentication.\nUI:N - Exploitation requires only attacker-sent SCTP packets; no victim user action beyond ordinary association close is needed.\nS:U - Impact stays within the vulnerable host kernel (transport UAF / privilege escalation or crash); it does not cross a VM, IOMMU, or other security boundary.\nC:H - This is a heap use-after-free of an sctp_transport; freed object reuse can yield arbitrary kernel read primitives.\nI:H - The same transport UAF enables heap spraying and write/control-flow hijacking primitives for integrity compromise or code execution.\nA:H - The bug causes a reproducible kernel general protection fault / panic when the T2 timer later dereferences the freed transport."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sctp/sm_statefuns.c"], "versions": [{"version": "db8bf823e70f239372c62f13e4eb6f08a1665e8c", "lessThan": "d624f2991b977821375fbd56c91b0c91d456a697", "status": "affected", "versionType": "git"}, {"version": "a204d577be70e0a0a6023cf1b9859c9ebffaeecd", "lessThan": "b1b31948c0af44628e43353828453461bb74098f", "status": "affected", "versionType": "git"}, {"version": "145cb2f7177d94bc54563ed26027e952ee0ae03c", "lessThan": "f01988ecf3654f805282dce2d3bb9afe68d2691e", "status": "affected", "versionType": "git"}, {"version": "145cb2f7177d94bc54563ed26027e952ee0ae03c", "lessThan": "61b877bad9bb0d82b7d8841be50872557090a704", "status": "affected", "versionType": "git"}, {"version": "145cb2f7177d94bc54563ed26027e952ee0ae03c", "lessThan": "0bfd913c2121b3d553bfd52810fe6061d542d625", "status": "affected", "versionType": "git"}, {"version": "145cb2f7177d94bc54563ed26027e952ee0ae03c", "lessThan": "35b4f24415c854cd718ccdf38dbea6297f010aae", "status": "affected", "versionType": "git"}, {"version": "a5ce8531ea508d270822b2bc6140c6198c8a2a7b", "status": "affected", "versionType": "git"}, {"version": "4.19.123", "lessThan": "4.19.191", "status": "affected", "versionType": "semver"}, {"version": "5.4.41", 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"semver"}, {"version": "5.13", "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": "4.19.123", "versionEndExcluding": "4.19.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.41", "versionEndExcluding": "5.4.120"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.10.38"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.11.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.12.5"}, {"vulnerable": true, "criteria": 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a remote peer triggers it by sending SCTP packets over IP.\nAC:L - A peer can observe SHUTDOWN, withhold SHUTDOWN-ACK to keep the victim in SHUTDOWN_SENT, then complete a restart INIT/COOKIE-ECHO exchange; the attacker controls both the timing and the packets that create the UAF.\nPR:N - No local privileges are required\u2014any remote SCTP client that completes a normal association handshake can send the restart COOKIE-ECHO; cookie HMAC is protocol anti-DoS, not OS authentication.\nUI:N - Exploitation requires only attacker-sent SCTP packets; no victim user action beyond ordinary association close is needed.\nS:U - Impact stays within the vulnerable host kernel (transport UAF / privilege escalation or crash); it does not cross a VM, IOMMU, or other security boundary.\nC:H - This is a heap use-after-free of an sctp_transport; freed object reuse can yield arbitrary kernel read primitives.\nI:H - The same transport UAF enables heap spraying and write/control-flow hijacking primitives for integrity compromise or code execution.\nA:H - The bug causes a reproducible kernel general protection fault / panic when the T2 timer later dereferences the freed transport."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "db8bf823e70f239372c62f13e4eb6f08a1665e8c", "lessThan": "d624f2991b977821375fbd56c91b0c91d456a697", "versionType": "git"}, {"status": "affected", "version": "a204d577be70e0a0a6023cf1b9859c9ebffaeecd", "lessThan": "b1b31948c0af44628e43353828453461bb74098f", "versionType": "git"}, {"status": "affected", "version": "145cb2f7177d94bc54563ed26027e952ee0ae03c", "lessThan": "f01988ecf3654f805282dce2d3bb9afe68d2691e", "versionType": "git"}, {"status": "affected", "version": "145cb2f7177d94bc54563ed26027e952ee0ae03c", "lessThan": "61b877bad9bb0d82b7d8841be50872557090a704", "versionType": "git"}, {"status": "affected", "version": "145cb2f7177d94bc54563ed26027e952ee0ae03c", "lessThan": "0bfd913c2121b3d553bfd52810fe6061d542d625", "versionType": "git"}, {"status": "affected", "version": "145cb2f7177d94bc54563ed26027e952ee0ae03c", "lessThan": "35b4f24415c854cd718ccdf38dbea6297f010aae", "versionType": "git"}, {"status": "affected", "version": "a5ce8531ea508d270822b2bc6140c6198c8a2a7b", "versionType": "git"}, {"status": "affected", "version": "4.19.123", "lessThan": "4.19.191", "versionType": "semver"}, {"status": "affected", "version": "5.4.41", "lessThan": "5.4.120", "versionType": "semver"}, {"status": "affected", "version": "5.6.13", "lessThan": "5.7", "versionType": "semver"}], "programFiles": ["net/sctp/sm_statefuns.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"status": "unaffected", "version": "0", "lessThan": "5.7", "versionType": "semver"}, {"status": "unaffected", "version": "4.19.191", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.120", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.38", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.11.22", "versionType": "semver", "lessThanOrEqual": "5.11.*"}, {"status": "unaffected", "version": "5.12.5", "versionType": "semver", "lessThanOrEqual": "5.12.*"}, {"status": "unaffected", "version": "5.13", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/sctp/sm_statefuns.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/d624f2991b977821375fbd56c91b0c91d456a697"}, {"url": "https://git.kernel.org/stable/c/b1b31948c0af44628e43353828453461bb74098f"}, {"url": "https://git.kernel.org/stable/c/f01988ecf3654f805282dce2d3bb9afe68d2691e"}, {"url": "https://git.kernel.org/stable/c/61b877bad9bb0d82b7d8841be50872557090a704"}, {"url": "https://git.kernel.org/stable/c/0bfd913c2121b3d553bfd52810fe6061d542d625"}, {"url": "https://git.kernel.org/stable/c/35b4f24415c854cd718ccdf38dbea6297f010aae"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: do asoc update earlier in sctp_sf_do_dupcook_a\n\nThere's a panic that occurs in a few of envs, the call trace is as below:\n\n [] general protection fault, ... 0x29acd70f1000a: 0000 [#1] SMP PTI\n [] RIP: 0010:sctp_ulpevent_notify_peer_addr_change+0x4b/0x1fa [sctp]\n [] sctp_assoc_control_transport+0x1b9/0x210 [sctp]\n [] sctp_do_8_2_transport_strike.isra.16+0x15c/0x220 [sctp]\n [] sctp_cmd_interpreter.isra.21+0x1231/0x1a10 [sctp]\n [] sctp_do_sm+0xc3/0x2a0 [sctp]\n [] sctp_generate_timeout_event+0x81/0xf0 [sctp]\n\nThis is caused by a transport use-after-free issue. When processing a\nduplicate COOKIE-ECHO chunk in sctp_sf_do_dupcook_a(), both COOKIE-ACK\nand SHUTDOWN chunks are allocated with the transort from the new asoc.\nHowever, later in the sideeffect machine, the old asoc is used to send\nthem out and old asoc's shutdown_last_sent_to is set to the transport\nthat SHUTDOWN chunk attached to in sctp_cmd_setup_t2(), which actually\nbelongs to the new asoc. After the new_asoc is freed and the old asoc\nT2 timeout, the old asoc's shutdown_last_sent_to that is already freed\nwould be accessed in sctp_sf_t2_timer_expire().\n\nThanks Alexander and Jere for helping dig into this issue.\n\nTo fix it, this patch is to do the asoc update first, then allocate\nthe COOKIE-ACK and SHUTDOWN chunks with the 'updated' old asoc. This\nwould make more sense, as a chunk from an asoc shouldn't be sent out\nwith another asoc. We had fixed quite a few issues caused by this."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.19.191", "versionStartIncluding": "4.19.123"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.120", "versionStartIncluding": "5.4.41"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.38", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.11.22", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.12.5", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.13", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.6.13"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:45:28.974Z"}}}, "cveMetadata": {"cveId": "CVE-2021-46999", "state": "PUBLISHED", "dateUpdated": "2026-08-05T08:45:28.974Z", "dateReserved": "2024-02-27T18:42:55.950Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-02-28T08:13:22.256Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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When processing a\nduplicate COOKIE-ECHO chunk in sctp_sf_do_dupcook_a(), both COOKIE-ACK\nand SHUTDOWN chunks are allocated with the transort from the new asoc.\nHowever, later in the sideeffect machine, the old asoc is used to send\nthem out and old asoc's shutdown_last_sent_to is set to the transport\nthat SHUTDOWN chunk attached to in sctp_cmd_setup_t2(), which actually\nbelongs to the new asoc. After the new_asoc is freed and the old asoc\nT2 timeout, the old asoc's shutdown_last_sent_to that is already freed\nwould be accessed in sctp_sf_t2_timer_expire().\n\nThanks Alexander and Jere for helping dig into this issue.\n\nTo fix it, this patch is to do the asoc update first, then allocate\nthe COOKIE-ACK and SHUTDOWN chunks with the 'updated' old asoc. This\nwould make more sense, as a chunk from an asoc shouldn't be sent out\nwith another asoc. We had fixed quite a few issues caused by this."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sctp: haga una actualizaci\u00f3n anterior en sctp_sf_do_dupcook_a Hay un p\u00e1nico que ocurre en algunos de los entornos, el seguimiento de la llamada es el siguiente: [] falla de protecci\u00f3n general, ... 0x29acd70f1000a: 0000 [#1] SMP PTI [] RIP: 0010:sctp_ulpevent_notify_peer_addr_change+0x4b/0x1fa [sctp] [] sctp_assoc_control_transport+0x1b9/0x210 [sctp] [] sctp_do_8_2_transport_strike.isra.16+0x15c/0x220 [sctp] [] sctp_cmd_interpreter.isra. 21+0x1231/0x1a10 [sctp] [] sctp_do_sm+0xc3/0x2a0 [sctp] [] sctp_generate_timeout_event+0x81/0xf0 [sctp] Esto se debe a un problema de use-after-free del transporte. Al procesar un fragmento COOKIE-ECHO duplicado en sctp_sf_do_dupcook_a(), tanto los fragmentos COOKIE-ACK como SHUTDOWN se asignan con el transort del nuevo asoc. Sin embargo, m\u00e1s adelante en la m\u00e1quina de efectos secundarios, el antiguo asoc se utiliza para enviarlos y el Shutdown_last_sent_to del antiguo asoc se configura en el transporte al que se adjunt\u00f3 el fragmento SHUTDOWN en sctp_cmd_setup_t2(), que en realidad pertenece al nuevo asoc. Despu\u00e9s de que se libera el new_asoc y se agota el tiempo de espera T2 del antiguo asoc, se acceder\u00e1 al Shutdown_last_sent_to del antiguo asoc que ya est\u00e1 liberado en sctp_sf_t2_timer_expire(). Gracias Alexander y Jere por ayudarnos a profundizar en este problema. Para solucionarlo, este parche consiste en realizar primero la actualizaci\u00f3n de asoc y luego asignar los fragmentos COOKIE-ACK y SHUTDOWN con el antiguo asoc 'actualizado'. Esto tendr\u00eda m\u00e1s sentido, ya que un fragmento de una asoc no deber\u00eda enviarse con otra asoc. Hemos solucionado bastantes problemas causados por esto."}], "id": "CVE-2021-46999", "lastModified": "2026-08-04T10:16:40.750", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-46999", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-06-21T16:28:23.491999Z", "version": "2.0.3"}}]}, "published": "2024-02-28T09:15:38.130", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0bfd913c2121b3d553bfd52810fe6061d542d625"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/35b4f24415c854cd718ccdf38dbea6297f010aae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/61b877bad9bb0d82b7d8841be50872557090a704"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b1b31948c0af44628e43353828453461bb74098f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d624f2991b977821375fbd56c91b0c91d456a697"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f01988ecf3654f805282dce2d3bb9afe68d2691e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0bfd913c2121b3d553bfd52810fe6061d542d625"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/35b4f24415c854cd718ccdf38dbea6297f010aae"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/61b877bad9bb0d82b7d8841be50872557090a704"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b1b31948c0af44628e43353828453461bb74098f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d624f2991b977821375fbd56c91b0c91d456a697"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f01988ecf3654f805282dce2d3bb9afe68d2691e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: sctp: do asoc update earlier in sctp_sf_do_dupcook_a", "id": "2266874", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2266874"}, "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-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsctp: do asoc update earlier in sctp_sf_do_dupcook_a\nThere's a panic that occurs in a few of envs, the call trace is as below:\n[] general protection fault, ... 0x29acd70f1000a: 0000 [#1] SMP PTI\n[] RIP: 0010:sctp_ulpevent_notify_peer_addr_change+0x4b/0x1fa [sctp]\n[] sctp_assoc_control_transport+0x1b9/0x210 [sctp]\n[] sctp_do_8_2_transport_strike.isra.16+0x15c/0x220 [sctp]\n[] sctp_cmd_interpreter.isra.21+0x1231/0x1a10 [sctp]\n[] sctp_do_sm+0xc3/0x2a0 [sctp]\n[] sctp_generate_timeout_event+0x81/0xf0 [sctp]\nThis is caused by a transport use-after-free issue. When processing a\nduplicate COOKIE-ECHO chunk in sctp_sf_do_dupcook_a(), both COOKIE-ACK\nand SHUTDOWN chunks are allocated with the transort from the new asoc.\nHowever, later in the sideeffect machine, the old asoc is used to send\nthem out and old asoc's shutdown_last_sent_to is set to the transport\nthat SHUTDOWN chunk attached to in sctp_cmd_setup_t2(), which actually\nbelongs to the new asoc. After the new_asoc is freed and the old asoc\nT2 timeout, the old asoc's shutdown_last_sent_to that is already freed\nwould be accessed in sctp_sf_t2_timer_expire().\nThanks Alexander and Jere for helping dig into this issue.\nTo fix it, this patch is to do the asoc update first, then allocate\nthe COOKIE-ACK and SHUTDOWN chunks with the 'updated' old asoc. This\nwould make more sense, as a chunk from an asoc shouldn't be sent out\nwith another asoc. We had fixed quite a few issues caused by this."], "name": "CVE-2021-46999", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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": "2024-02-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-46999\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-46999\nhttps://lore.kernel.org/linux-cve-announce/2024022828-CVE-2021-46999-d408@gregkh/T/#u"], "threat_severity": "Moderate"}

{}