net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce()

Summary

In the Linux kernel, the following vulnerability has been resolved: net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce() If new_asoc->peer.adaptation_ind=0 and sctp_ulpevent_make_authkey=0 and sctp_ulpevent_make_authkey() returns 0, then the variable ai_ev remains zero and the zero will be dereferenced in the sctp_ulpevent_free() function.

Timeline

1. Nov 12, 2025, 9:56 PM UTCCVE published
2. Oct 15, 2026, 9:57 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: partial

3. Oct 15, 2026, 10:02 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b · fixed in 1014b83778c8677f1d7a57c26dc728baa801ac62; From 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b · fixed in 7f702f85df0266ed7b5bab81ba50394c92f3c928; From 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b · fixed in dbceedc0213e75bf3e9f9f9e2f66b10699d004fe; From 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b · fixed in 025419f4e216a3ae0d0cec622262e98e8078c447; From 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b · fixed in c21f45cfa4a9526b34d76b397c9ef080668b6e73; From 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b · fixed in d0e8f1445c19b1786759ba72a38267e1449bab7e; From 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b · fixed in badbd79313e6591616c1b78e29a9b71efed7f035; From 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b · fixed in 2f3119686ef50319490ccaec81a575973da98815

• Linux Linux

  4.17

• KernelLinux

  From 4.17.0 · fixed in 5.4.301; From 5.5.0 · fixed in 5.10.246; From 5.11.0 · fixed in 5.15.195; From 5.16.0 · fixed in 6.1.157; From 6.2.0 · fixed in 6.6.113; From 6.7.0 · fixed in 6.12.54; From 6.13.0 · fixed in 6.17.4

References 8