Tracker / CVE-2024-26752
CVE-2024-26752
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.
Prodotti e versioni affette
| debian | debian_linux |
|---|---|
| linux | linux_kernel |
| linux | linux_kernel · 4.19.296 → 4.19.308 |
| linux | linux_kernel · 5.10.198 → 5.10.211 |
| linux | linux_kernel · 5.15.135 → 5.15.150 |
| linux | linux_kernel · 5.4.258 → 5.4.270 |
| linux | linux_kernel · 6.1.57 → 6.1.80 |
| linux | linux_kernel · 6.6 → 6.6.19 |
| linux | linux_kernel · 6.7 → 6.7.7 |