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CVE-2024-26752 Detail

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.


Severity



CVSS 4.0 Severity and Metrics:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://git.kernel.org/stable/c/0da15a70395182ee8cb75716baf00dddc0bea38d
https://git.kernel.org/stable/c/13cd1daeea848614e585b2c6ecc11ca9c8ab2500
https://git.kernel.org/stable/c/359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79
https://git.kernel.org/stable/c/4c3ce64bc9d36ca9164dd6c77ff144c121011aae
https://git.kernel.org/stable/c/804bd8650a3a2bf3432375f8c97d5049d845ce56
https://git.kernel.org/stable/c/83340c66b498e49353530e41542500fc8a4782d6
https://git.kernel.org/stable/c/c1d3a84a67db910ce28a871273c992c3d7f9efb5
https://git.kernel.org/stable/c/dcb4d14268595065c85dc5528056713928e17243

Weakness Enumeration

CWE-ID CWE Name Source

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-26752
NVD Published Date:
04/03/2024
NVD Last Modified:
04/03/2024
Source:
kernel.org