CVE-2022-49838 (GCVE-0-2022-49838)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:09 – Updated: 2026-05-11 19:07
VLAI
Title
sctp: clear out_curr if all frag chunks of current msg are pruned
Summary
In the Linux kernel, the following vulnerability has been resolved: sctp: clear out_curr if all frag chunks of current msg are pruned A crash was reported by Zhen Chen: list_del corruption, ffffa035ddf01c18->next is NULL WARNING: CPU: 1 PID: 250682 at lib/list_debug.c:49 __list_del_entry_valid+0x59/0xe0 RIP: 0010:__list_del_entry_valid+0x59/0xe0 Call Trace: 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 and in sctp_sched_fcfs_dequeue() it dequeued a chunk from stream out_curr outq while this outq was empty. Normally stream->out_curr must be set to NULL once all frag chunks of current msg are dequeued, as we can see in sctp_sched_dequeue_done(). However, in sctp_prsctp_prune_unsent() as it is not a proper dequeue, sctp_sched_dequeue_done() is not called to do this. This patch is to fix it by simply setting out_curr to NULL when the last frag chunk of current msg is dequeued from out_curr stream in sctp_prsctp_prune_unsent().
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 , < e27458b18b35caee4b27b37a4a9c503b93cae5cc (git)
Affected: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 , < 2ea600b598dd3e061854dd4dd5b4c815397dfcea (git)
Affected: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 , < 3eff34e01062ec08fbb45ce2baaaa644550be821 (git)
Affected: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 , < 2f201ae14ae0f91dbf1cffea7bb1e29e81d4d108 (git)
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Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 5.10.156 , ≤ 5.10.* (semver)
Unaffected: 5.15.81 , ≤ 5.15.* (semver)
Unaffected: 6.0.10 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "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-\u003enext 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-\u003eout_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()."
          },
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            "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-\u0026gt;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-\u0026gt;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()."
          }
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        "id": "CVE-2022-49838",
        "lastModified": "2026-06-17T05:19:15.923",
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                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
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                "userInteraction": "NONE",
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      "current_release_date": "2026-06-29T21:18:59+00:00",
      "cve": "CVE-2022-49838",
      "id": "CVE-2022-49838",
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      "product_status:known_affected": "198",
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      "source": "Red Hat CSAF VEX",
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      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49838.json",
      "version": "3"
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      "current_release_date": "2026-09-01T01:26:08Z",
      "cve": "CVE-2022-49838",
      "id": "CVE-2022-49838",
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      "product_status:known_not_affected": "514",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49838",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49838.json",
      "version": "9"
    }
  }
}



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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.