CVE-2022-50865high

CVE-2022-50865: high-severity vulnerability in Linux

tcp: fix a signed-integer-overflow bug in tcp_add_backlog()

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 0.5%
exploitation probability
0.5%top 57% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved: tcp: fix a signed-integer-overflow bug in tcp_add_backlog() The type of sk_rcvbuf and sk_sndbuf in struct sock is int, and in tcp_add_backlog(), the variable limit is caculated by adding sk_rcvbuf, sk_sndbuf and 64 * 1024, it may exceed the max value of int and overflow. This patch reduces the limit budget by halving the sndbuf to solve this issue since ACK packets are much smaller than the payload.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Linux · Linux
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References
https://git.kernel.org/stable/c/28addf029417d53b1df062b4c87feb7bc033cb5fhttps://git.kernel.org/stable/c/4f23cb2be530785db284a685d1b1c30224d8a538https://git.kernel.org/stable/c/9d04b4d0feee12bce6bfe37f30d8e953d3c30368https://git.kernel.org/stable/c/a85d39f14aa8a71e29cfb5eb5de02878a8779898https://git.kernel.org/stable/c/ec791d8149ff60c40ad2074af3b92a39c916a03f