cve-2024-26752
Vulnerability from cvelistv5
Published
2024-04-03 17:00
Modified
2024-12-19 08:46
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0da15a70395182ee8cb75716baf00dddc0bea38d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/13cd1daeea848614e585b2c6ecc11ca9c8ab2500
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4c3ce64bc9d36ca9164dd6c77ff144c121011aae
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/804bd8650a3a2bf3432375f8c97d5049d845ce56
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/83340c66b498e49353530e41542500fc8a4782d6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c1d3a84a67db910ce28a871273c992c3d7f9efb5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dcb4d14268595065c85dc5528056713928e17243
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0da15a70395182ee8cb75716baf00dddc0bea38d
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/13cd1daeea848614e585b2c6ecc11ca9c8ab2500
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4c3ce64bc9d36ca9164dd6c77ff144c121011aae
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/804bd8650a3a2bf3432375f8c97d5049d845ce56
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/83340c66b498e49353530e41542500fc8a4782d6
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c1d3a84a67db910ce28a871273c992c3d7f9efb5
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/dcb4d14268595065c85dc5528056713928e17243
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
Impacted products
Vendor Product Version
Linux Linux Version: 6.6
Show details on NVD website

To clipboard 

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}


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