CVE-2022-49838

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sctp_outq_flush_data+0x85/0x360 [sctp]\n sctp_outq_uncork+0x77/0xa0 [sctp]\n sctp_cmd_interpreter.constprop.0+0x164/0x1450 [sctp]\n sctp_side_effects+0x37/0xe0 [sctp]\n sctp_do_sm+0xd0/0x230 [sctp]\n sctp_primitive_SEND+0x2f/0x40 [sctp]\n sctp_sendmsg_to_asoc+0x3fa/0x5c0 [sctp]\n sctp_sendmsg+0x3d5/0x440 [sctp]\n sock_sendmsg+0x5b/0x70\n\nand in sctp_sched_fcfs_dequeue() it dequeued a chunk from stream\nout_curr outq while this outq was empty.\n\nNormally stream->out_curr must be set to NULL once all frag chunks of\ncurrent msg are dequeued, as we can see in sctp_sched_dequeue_done().\nHowever, in sctp_prsctp_prune_unsent() as it is not a proper dequeue,\nsctp_sched_dequeue_done() is not called to do this.\n\nThis patch is to fix it by simply setting out_curr to NULL when the\nlast frag chunk of current msg is dequeued from out_curr stream in\nsctp_prsctp_prune_unsent()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": 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"lessThanOrEqual": "6.0.*"}, {"status": "unaffected", "version": "6.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/sctp/outqueue.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/e27458b18b35caee4b27b37a4a9c503b93cae5cc"}, {"url": "https://git.kernel.org/stable/c/2ea600b598dd3e061854dd4dd5b4c815397dfcea"}, {"url": "https://git.kernel.org/stable/c/3eff34e01062ec08fbb45ce2baaaa644550be821"}, {"url": "https://git.kernel.org/stable/c/2f201ae14ae0f91dbf1cffea7bb1e29e81d4d108"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: clear out_curr if all frag chunks of current msg are pruned\n\nA crash was reported by Zhen Chen:\n\n list_del corruption, ffffa035ddf01c18->next is NULL\n WARNING: CPU: 1 PID: 250682 at lib/list_debug.c:49 __list_del_entry_valid+0x59/0xe0\n RIP: 0010:__list_del_entry_valid+0x59/0xe0\n Call Trace:\n sctp_sched_dequeue_common+0x17/0x70 [sctp]\n sctp_sched_fcfs_dequeue+0x37/0x50 [sctp]\n sctp_outq_flush_data+0x85/0x360 [sctp]\n sctp_outq_uncork+0x77/0xa0 [sctp]\n sctp_cmd_interpreter.constprop.0+0x164/0x1450 [sctp]\n sctp_side_effects+0x37/0xe0 [sctp]\n sctp_do_sm+0xd0/0x230 [sctp]\n sctp_primitive_SEND+0x2f/0x40 [sctp]\n sctp_sendmsg_to_asoc+0x3fa/0x5c0 [sctp]\n sctp_sendmsg+0x3d5/0x440 [sctp]\n sock_sendmsg+0x5b/0x70\n\nand in sctp_sched_fcfs_dequeue() it dequeued a chunk from stream\nout_curr outq while this outq was empty.\n\nNormally stream->out_curr must be set to NULL once all frag chunks of\ncurrent msg are dequeued, as we can see in sctp_sched_dequeue_done().\nHowever, in sctp_prsctp_prune_unsent() as it is not a proper dequeue,\nsctp_sched_dequeue_done() is not called to do this.\n\nThis patch is to fix it by simply setting out_curr to NULL when the\nlast frag chunk of current msg is dequeued from out_curr stream in\nsctp_prsctp_prune_unsent()."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.156", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.81", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.0.10", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1", "versionStartIncluding": "4.15"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:07:45.252Z"}}}, "cveMetadata": {"cveId": "CVE-2022-49838", "state": "PUBLISHED", "dateUpdated": "2026-11-05T20:00:09.460Z", "dateReserved": 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/sctp/outqueue.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e27458b18b35caee4b27b37a4a9c503b93cae5cc", "status": "affected", "version": "5bbbbe32a43199c2b9ea5ea66fab6241c64beb51", "versionType": "git"}, {"lessThan": "2ea600b598dd3e061854dd4dd5b4c815397dfcea", "status": "affected", "version": "5bbbbe32a43199c2b9ea5ea66fab6241c64beb51", "versionType": "git"}, {"lessThan": "3eff34e01062ec08fbb45ce2baaaa644550be821", "status": "affected", "version": "5bbbbe32a43199c2b9ea5ea66fab6241c64beb51", "versionType": "git"}, {"lessThan": "2f201ae14ae0f91dbf1cffea7bb1e29e81d4d108", "status": "affected", "version": "5bbbbe32a43199c2b9ea5ea66fab6241c64beb51", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/sctp/outqueue.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.15"}, {"lessThan": "4.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.156", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.81", "versionType": "semver"}, {"lessThanOrEqual": "6.0.*", "status": "unaffected", "version": "6.0.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FD21D167-0ED1-4E15-9045-D5398B716044", "versionEndExcluding": "5.10.156", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "899FBA32-27B2-4660-BC94-C43ED4349EB5", "versionEndExcluding": "5.15.81", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "64F9ADD1-3ADB-4D66-A00F-4A83010B05F0", "versionEndExcluding": "6.0.10", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*", "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*", "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*", "matchCriteriaId": "1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: clear out_curr if all frag chunks of current msg are pruned\n\nA crash was reported by Zhen Chen:\n\n list_del corruption, ffffa035ddf01c18->next is NULL\n WARNING: CPU: 1 PID: 250682 at lib/list_debug.c:49 __list_del_entry_valid+0x59/0xe0\n RIP: 0010:__list_del_entry_valid+0x59/0xe0\n Call Trace:\n sctp_sched_dequeue_common+0x17/0x70 [sctp]\n sctp_sched_fcfs_dequeue+0x37/0x50 [sctp]\n sctp_outq_flush_data+0x85/0x360 [sctp]\n sctp_outq_uncork+0x77/0xa0 [sctp]\n sctp_cmd_interpreter.constprop.0+0x164/0x1450 [sctp]\n sctp_side_effects+0x37/0xe0 [sctp]\n sctp_do_sm+0xd0/0x230 [sctp]\n sctp_primitive_SEND+0x2f/0x40 [sctp]\n sctp_sendmsg_to_asoc+0x3fa/0x5c0 [sctp]\n sctp_sendmsg+0x3d5/0x440 [sctp]\n sock_sendmsg+0x5b/0x70\n\nand in sctp_sched_fcfs_dequeue() it dequeued a chunk from stream\nout_curr outq while this outq was empty.\n\nNormally stream->out_curr must be set to NULL once all frag chunks of\ncurrent msg are dequeued, as we can see in sctp_sched_dequeue_done().\nHowever, in sctp_prsctp_prune_unsent() as it is not a proper dequeue,\nsctp_sched_dequeue_done() is not called to do this.\n\nThis patch is to fix it by simply setting out_curr to NULL when the\nlast frag chunk of current msg is dequeued from out_curr stream in\nsctp_prsctp_prune_unsent()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sctp: borrar out_curr si se eliminan todos los fragmentos del mensaje actual. Zhen Chen inform\u00f3 de un fallo: corrupci\u00f3n de list_del, ffffa035ddf01c18->next es NULL ADVERTENCIA: CPU: 1 PID: 250682 en lib/list_debug.c:49 __list_del_entry_valid+0x59/0xe0 RIP: 0010:__list_del_entry_valid+0x59/0xe0 Rastreo de llamadas: sctp_sched_dequeue_common+0x17/0x70 [sctp] sctp_sched_fcfs_dequeue+0x37/0x50 [sctp] sctp_outq_flush_data+0x85/0x360 [sctp] sctp_outq_uncork+0x77/0xa0 [sctp] sctp_cmd_interpreter.constprop.0+0x164/0x1450 [sctp] sctp_side_effects+0x37/0xe0 [sctp] sctp_do_sm+0xd0/0x230 [sctp] sctp_primitive_SEND+0x2f/0x40 [sctp] sctp_sendmsg_to_asoc+0x3fa/0x5c0 [sctp] sctp_sendmsg+0x3d5/0x440 [sctp] sock_sendmsg+0x5b/0x70 y en sctp_sched_fcfs_dequeue() quit\u00f3 de la cola un fragmento del flujo out_curr outq mientras este outq estaba vac\u00edo. Normalmente, stream->out_curr debe establecerse en NULL una vez que se hayan desencolado todos los fragmentos del mensaje actual, como se puede ver en sctp_sched_dequeue_done(). Sin embargo, en sctp_prsctp_prune_unsent(), dado que no es una desencola adecuada, no se llama a sctp_sched_dequeue_done() para realizar esto. Este parche soluciona este problema simplemente estableciendo out_curr en NULL cuando se desencola el \u00faltimo fragmento del mensaje actual del flujo out_curr en sctp_prsctp_prune_unsent()."}], "id": "CVE-2022-49838", "lastModified": "2026-11-05T20:17:15.853", "metrics": {"cvssMetricV31": [{"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-2022-49838", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T19:50:40.509260Z", "version": "2.0.3"}}]}, "published": "2025-05-01T15:16:07.290", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2ea600b598dd3e061854dd4dd5b4c815397dfcea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2f201ae14ae0f91dbf1cffea7bb1e29e81d4d108"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3eff34e01062ec08fbb45ce2baaaa644550be821"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e27458b18b35caee4b27b37a4a9c503b93cae5cc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: sctp: clear out_curr if all frag chunks of current msg are pruned", "id": "2363454", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363454"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsctp: clear out_curr if all frag chunks of current msg are pruned\nA crash was reported by Zhen Chen:\nlist_del corruption, ffffa035ddf01c18->next is NULL\nWARNING: CPU: 1 PID: 250682 at lib/list_debug.c:49 __list_del_entry_valid+0x59/0xe0\nRIP: 0010:__list_del_entry_valid+0x59/0xe0\nCall Trace:\nsctp_sched_dequeue_common+0x17/0x70 [sctp]\nsctp_sched_fcfs_dequeue+0x37/0x50 [sctp]\nsctp_outq_flush_data+0x85/0x360 [sctp]\nsctp_outq_uncork+0x77/0xa0 [sctp]\nsctp_cmd_interpreter.constprop.0+0x164/0x1450 [sctp]\nsctp_side_effects+0x37/0xe0 [sctp]\nsctp_do_sm+0xd0/0x230 [sctp]\nsctp_primitive_SEND+0x2f/0x40 [sctp]\nsctp_sendmsg_to_asoc+0x3fa/0x5c0 [sctp]\nsctp_sendmsg+0x3d5/0x440 [sctp]\nsock_sendmsg+0x5b/0x70\nand in sctp_sched_fcfs_dequeue() it dequeued a chunk from stream\nout_curr outq while this outq was empty.\nNormally stream->out_curr must be set to NULL once all frag chunks of\ncurrent msg are dequeued, as we can see in sctp_sched_dequeue_done().\nHowever, in sctp_prsctp_prune_unsent() as it is not a proper dequeue,\nsctp_sched_dequeue_done() is not called to do this.\nThis patch is to fix it by simply setting out_curr to NULL when the\nlast frag chunk of current msg is dequeued from out_curr stream in\nsctp_prsctp_prune_unsent()."], "name": "CVE-2022-49838", "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": "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "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": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49838\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49838\nhttps://lore.kernel.org/linux-cve-announce/2025050139-CVE-2022-49838-0bb8@gregkh/T"], "statement": "A kernel crash was triggered by an inconsistency in the SCTP stream scheduler, where out_curr was not cleared when all fragmented chunks of a message were pruned (not properly dequeued). This led to a use-after-free scenario during subsequent stream scheduling operations, causing memory corruption and a kernel panic. This issue requires the ability to send SCTP messages with PR-SCTP (Partial Reliability) and fragmented data, which is typically restricted to privileged users or those running SCTP-capable applications on controlled environments.", "threat_severity": "Moderate"}

{"created": "2025-06-24T09:51:42.585899+00:00", "updated": "2025-06-24T09:51:42.585964+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}