net: tls: avoid hanging tasks on the tx_lock

Summary

In the Linux kernel, the following vulnerability has been resolved: net: tls: avoid hanging tasks on the tx_lock syzbot sent a hung task report and Eric explains that adversarial receiver may keep RWIN at 0 for a long time, so we are not guaranteed to make forward progress. Thread which took tx_lock and went to sleep may not release tx_lock for hours. Use interruptible sleep where possible and reschedule the work if it can't take the lock. Testing: existing selftest passes

Timeline

1. Dec 30, 2025, 12:23 PM UTCCVE published
2. Oct 15, 2026, 9:40 PM UTCCISA SSVC assessment

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

3. Oct 15, 2026, 9:41 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 79ffe6087e9145d2377385cac48d0d6a6b4225a5 · fixed in bde541a57b4204d0a800afbbd3d1c06c9cdb133f; From 79ffe6087e9145d2377385cac48d0d6a6b4225a5 · fixed in 7123a4337bf73132bbfb5437e4dc83ba864a9a1e; From 79ffe6087e9145d2377385cac48d0d6a6b4225a5 · fixed in be5d5d0637fd88c18ee76024bdb22649a1de00d6; From 79ffe6087e9145d2377385cac48d0d6a6b4225a5 · fixed in 1f800f6aae57d2d8f63d32fff383017cbc11cf65; From 79ffe6087e9145d2377385cac48d0d6a6b4225a5 · fixed in ccf1ccdc5926907befbe880b562b2a4b5f44c087; From 79ffe6087e9145d2377385cac48d0d6a6b4225a5 · fixed in f3221361dc85d4de22586ce8441ec2c67b454f5d; From 5.3.11 · fixed in 5.4

• Linux Linux

  5.4

• KernelLinux

  From 5.4.0 · fixed in 5.4.235; From 5.5.0 · fixed in 5.10.173; From 5.11.0 · fixed in 5.15.100; From 5.16.0 · fixed in 6.1.18; From 6.2.0 · fixed in 6.2.5

References 6