{"apiVersion":"1.0","identifier":"CVE-2026-74688","description":"In the Linux kernel, the following vulnerability has been resolved: sctp: clear control chunk transport if it is being removed sctp_make_heartbeat_ack() caches the destination transport in chunk->transport without taking a reference. When src_out_of_asoc_ok is enabled, the HEARTBEAT ACK may remain queued on control_chunk_list instead of being transmitted immediately. If the peer transport is removed while the chunk is still queued, sctp_assoc_rm_peer() drops the transport and schedules it for RCU freeing, but only clears cached transport pointers in out_chunk_list. The queued control chunk therefore retains a dangling transport pointer. Once an ASCONF_ACK clears the suppression and the queued control chunk is transmitted, SCTP dereferences the stale transport pointer, leading to a use-after-free. Fix this by also clearing chunk->transport for queued control chunks in control_chunk_list when removing the transport.","publishedAt":"2026-08-22T16:16:43","lastModifiedAt":"2026-08-25T06:18:51","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74688","cvssScore":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.005,"riskScore":1.02,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74688","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74688","en":"https://www.redsauce.net/en/cves/CVE-2026-74688","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74688","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74688","de":"https://www.redsauce.net/de/cves/CVE-2026-74688","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74688","el":"https://www.redsauce.net/el/cves/CVE-2026-74688"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74688"}}