CVE-2022-50865
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Linux
PublishedDec 30, 2025
First seenDec 30, 2025
How to fix
Update
- Linux Linux9d04b4d0feee12bce6bfe37f30d8e953d3c30368, 4f23cb2be530785db284a685d1b1c30224d8a538, a85d39f14aa8a71e29cfb5eb5de02878a8779898, 28addf029417d53b1df062b4c87feb7bc033cb5f, ec791d8149ff60c40ad2074af3b92a39c916a03f or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | c9c3321257e1b95be9b375f811fb250162af8d39 ≤ v < 9d04b4d0feee12bce6bfe37f30d8e953d3c30368, c9c3321257e1b95be9b375f811fb250162af8d39 ≤ v < 4f23cb2be530785db284a685d1b1c30224d8a538, c9c3321257e1b95be9b375f811fb250162af8d39 ≤ v < a85d39f14aa8a71e29cfb5eb5de02878a8779898, c9c3321257e1b95be9b375f811fb250162af8d39 ≤ v < 28addf029417d53b1df062b4c87feb7bc033cb5f, c9c3321257e1b95be9b375f811fb250162af8d39 ≤ v < ec791d8149ff60c40ad2074af3b92a39c916a03f, 4.9 | 9d04b4d0feee12bce6bfe37f30d8e953d3c30368, 4f23cb2be530785db284a685d1b1c30224d8a538, a85d39f14aa8a71e29cfb5eb5de02878a8779898, 28addf029417d53b1df062b4c87feb7bc033cb5f, ec791d8149ff60c40ad2074af3b92a39c916a03f |
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