Back
CVE-2022-50865
tcp: fix a signed-integer-overflow bug in tcp_add_backlog()
High7.5EPSS 0.53%
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Deferred | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.53% · top 55% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected c9c3321257e1b95be9b375f811fb250162af8d39 – < 9d04b4d0feee12bce6bfe37f30d8e953d3c30368
- affected c9c3321257e1b95be9b375f811fb250162af8d39 – < 4f23cb2be530785db284a685d1b1c30224d8a538
- affected c9c3321257e1b95be9b375f811fb250162af8d39 – < a85d39f14aa8a71e29cfb5eb5de02878a8779898
- affected c9c3321257e1b95be9b375f811fb250162af8d39 – < 28addf029417d53b1df062b4c87feb7bc033cb5f
- affected c9c3321257e1b95be9b375f811fb250162af8d39 – < ec791d8149ff60c40ad2074af3b92a39c916a03f
- affected 4.9
- unaffected < 4.9
- unaffected 5.4.278 – ≤ 5.4.*
- unaffected 5.10.153 – ≤ 5.10.*
- unaffected 5.15.77 – ≤ 5.15.*
- unaffected 6.0.7 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (5)
- https://git.kernel.org/stable/c/9d04b4d0feee12bce6bfe37f30d8e953d3c30368 (opens in a new tab)
- https://git.kernel.org/stable/c/4f23cb2be530785db284a685d1b1c30224d8a538 (opens in a new tab)
- https://git.kernel.org/stable/c/a85d39f14aa8a71e29cfb5eb5de02878a8779898 (opens in a new tab)
- https://git.kernel.org/stable/c/28addf029417d53b1df062b4c87feb7bc033cb5f (opens in a new tab)
- https://git.kernel.org/stable/c/ec791d8149ff60c40ad2074af3b92a39c916a03f (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-50865)Record last updated .