tcp: fix a signed-integer-overflow bug in tcp_add_backlog()
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 62% 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 · LinuxReferences
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