tipc: fix memory leak in tipc_link_xmit

Summary

In the Linux kernel, the following vulnerability has been resolved: tipc: fix memory leak in tipc_link_xmit In case the backlog transmit queue for system-importance messages is overloaded, tipc_link_xmit() returns -ENOBUFS but the skb list is not purged. This leads to memory leak and failure when a skb is allocated. This commit fixes this issue by purging the skb list before tipc_link_xmit() returns.

Timeline

1. May 1, 2025, 12:56 PM UTCCVE published
2. Oct 15, 2026, 9:44 PM UTCCISA SSVC assessment

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

3. Oct 15, 2026, 9:51 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 365ad353c2564bba8835290061308ba825166b3a · fixed in 84895f5ce3829d9fc030e5ec2d8729da4c0c9d08; From 365ad353c2564bba8835290061308ba825166b3a · fixed in d4d40e437adb376be16b3a12dd5c63f0fa768247; From 365ad353c2564bba8835290061308ba825166b3a · fixed in ed06675d3b8cd37120b447646d53f7cd3e6fcd63; From 365ad353c2564bba8835290061308ba825166b3a · fixed in 24e6280cdd7f8d01fc6b9b365fb800c2fb7ea9bb; From 365ad353c2564bba8835290061308ba825166b3a · fixed in 09c2dcda2c551bba30710c33f6ac678ae7395389; From 365ad353c2564bba8835290061308ba825166b3a · fixed in 7c5957f7905b4aede9d7a559d271438f3ca9e852; From 365ad353c2564bba8835290061308ba825166b3a · fixed in d0e02d3d27a0b4dcb13f954f537ca1dd8f282dcf; From 365ad353c2564bba8835290061308ba825166b3a · fixed in a40cbfbb8f95c325430f017883da669b2aa927d4; From 365ad353c2564bba8835290061308ba825166b3a · fixed in 69ae94725f4fc9e75219d2d69022029c5b24bc9a

• Linux Linux

  4.11

• KernelLinux

  From 4.11.0 · fixed in 5.4.293; From 5.5.0 · fixed in 5.10.237; From 5.11.0 · fixed in 5.15.181; From 5.16.0 · fixed in 6.1.135; From 6.2.0 · fixed in 6.6.88; From 6.7.0 · fixed in 6.12.24; From 6.13.0 · fixed in 6.13.12; From 6.14.0 · fixed in 6.14.3

References 9