tls: always refresh the queue when reading sock

Summary

In the Linux kernel, the following vulnerability has been resolved: tls: always refresh the queue when reading sock After recent changes in net-next TCP compacts skbs much more aggressively. This unearthed a bug in TLS where we may try to operate on an old skb when checking if all skbs in the queue have matching decrypt state and geometry. BUG: KASAN: slab-use-after-free in tls_strp_check_rcv+0x898/0x9a0 [tls] (net/tls/tls_strp.c:436 net/tls/tls_strp.c:530 net/tls/tls_strp.c:544) Read of size 4 at addr ffff888013085750 by task tls/13529 CPU: 2 UID: 0 PID: 13529 Comm: tls Not tainted 6.16.0-rc5-virtme Call Trace: kasan_report+0xca/0x100 tls_strp_check_rcv+0x898/0x9a0 [tls] tls_rx_rec_wait+0x2c9/0x8d0 [tls] tls_sw_recvmsg+0x40f/0x1aa0 [tls] inet_recvmsg+0x1c3/0x1f0 Always reload the queue, fast path is to have the record in the queue when we wake, anyway (IOW the path going down "if !strp->stm.full_len").

Timeline

1. Jul 28, 2025, 11:21 AM UTCCVE published
2. Oct 15, 2026, 1:07 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 0d87bbd39d7fd1135ab9eca672d760470f6508e8 · fixed in 730fed2ff5e259495712518e18d9f521f61972bb; From 0d87bbd39d7fd1135ab9eca672d760470f6508e8 · fixed in 1f3a429c21e0e43e8b8c55d30701e91411a4df02; From 0d87bbd39d7fd1135ab9eca672d760470f6508e8 · fixed in cdb767915fc9a15d88d19d52a1455f1dc3e5ddc8; From 0d87bbd39d7fd1135ab9eca672d760470f6508e8 · fixed in c76f6f437c46b2390888e0e1dc7aafafa9f4e0c6; From 0d87bbd39d7fd1135ab9eca672d760470f6508e8 · fixed in 4ab26bce3969f8fd925fe6f6f551e4d1a508c68b; From 6.0.6 · fixed in 6.1

• Linux Linux

  6.1

• KernelLinux

  From 6.1.0 · fixed in 6.1.147; From 6.2.0 · fixed in 6.6.100; From 6.7.0 · fixed in 6.12.40; From 6.13.0 · fixed in 6.15.8

References 5