| Assigner | Linux |
| Reserved | 2024-02-19 |
| Published | 2024-04-03 |
| Updated | 2024-06-04 |
Description
In the Linux kernel, the following vulnerability has been resolved: l2tp: pass correct message length to ip6_append_data l2tp_ip6_sendmsg needs to avoid accounting for the transport header twice when splicing more data into an already partially-occupied skbuff. To manage this, we check whether the skbuff contains data using skb_queue_empty when deciding how much data to append using ip6_append_data. However, the code which performed the calculation was incorrect: ulen = len + skb_queue_empty(&sk->sk_write_queue) ? transhdrlen : 0; ...due to C operator precedence, this ends up setting ulen to transhdrlen for messages with a non-zero length, which results in corrupted packets on the wire. Add parentheses to correct the calculation in line with the original intent.
Product status
559d697c5d07 before 4c3ce64bc9d3
1fc793d68d50 before c1d3a84a67db
96b2e1090397 before dcb4d1426859
cd1189956393 before 0da15a703951
f6a7182179c0 before 13cd1daeea84
9d4c75800f61 before 804bd8650a3a
9d4c75800f61 before 83340c66b498
9d4c75800f61 before 359e54a93ab4
6.6
Any version before 6.6
4.19.308
5.4.270
5.10.211
5.15.150
6.1.80
6.6.19
6.7.7
6.8
References
https://git.kernel.org/stable/c/4c3ce64bc9d36ca9164dd6c77ff144c121011aae
https://git.kernel.org/stable/c/c1d3a84a67db910ce28a871273c992c3d7f9efb5
https://git.kernel.org/stable/c/dcb4d14268595065c85dc5528056713928e17243
https://git.kernel.org/stable/c/0da15a70395182ee8cb75716baf00dddc0bea38d
https://git.kernel.org/stable/c/13cd1daeea848614e585b2c6ecc11ca9c8ab2500
https://git.kernel.org/stable/c/804bd8650a3a2bf3432375f8c97d5049d845ce56
https://git.kernel.org/stable/c/83340c66b498e49353530e41542500fc8a4782d6
https://git.kernel.org/stable/c/359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79
