net: strparser: fix skb_head leak in strp_abort_strp()

Summary

In the Linux kernel, the following vulnerability has been resolved: net: strparser: fix skb_head leak in strp_abort_strp() When the stream parser is aborted, for example after a message assembly timeout, it can still hold a reference to a partially assembled message in strp->skb_head. That skb is not released in strp_abort_strp(), which leaks the partially assembled message and can be triggered repeatedly to exhaust memory. Fix this by freeing strp->skb_head and resetting the parser state in the abort path. Leave strp_stop() unchanged so final cleanup still happens in strp_done() after the work and timer have been synchronized.

Timeline

1. May 27, 2026, 12:59 PM UTCCVE published
2. Oct 16, 2026, 3:19 PM UTCCISA SSVC assessment

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

3. Oct 19, 2026, 7:26 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a · fixed in d6668ce0e78d23eabecef9a6bc4f0f739cb28ad3; From 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a · fixed in a470ed71c906cc8cbad0d74c9942216698911f8b; From 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a · fixed in c2e57695ec9ff9d42f23de70f3805199153d007b; From 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a · fixed in e9ae00490d474757c0f9c65073de83e6bb1e5a00; From 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a · fixed in 5327dad2ffe9c1b49881dd6d51ff3c6893847568; From 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a · fixed in 19ca9475f18f991735f98a22e735c43e95e6298d; From 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a · fixed in 56082f442023db9be1a5a29d4ee361de4017c0b7; From 43a0c6751a322847cb6fa0ab8cbf77a1d08bfc0a · fixed in fe72340daaf1af588be88056faf98965f39e6032

• Linux Linux

  4.9

• KernelLinux

  From 4.9.0 · fixed in 5.10.258; From 5.11.0 · fixed in 5.15.209; From 5.16.0 · fixed in 6.1.175; From 6.2.0 · fixed in 6.6.140; From 6.7.0 · fixed in 6.12.86; From 6.13.0 · fixed in 6.18.27; From 6.19.0 · fixed in 7.0.4

References 8