CVE-2022-50865
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.
Affected versions
Linux kernel versions
4.9
and later are affected. Fixed in
5.4.278,
5.10.153,
5.15.77,
6.0.7,
6.1
and their respective stable series.
References
The following references provide additional information about CVE-2022-50865 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/28addf029417d53b1df062b4c87feb7bc033cb5f
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PatchKernel patch commithttps://git.kernel.org/stable/c/4f23cb2be530785db284a685d1b1c30224d8a538
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PatchKernel patch commithttps://git.kernel.org/stable/c/9d04b4d0feee12bce6bfe37f30d8e953d3c30368
Frequently asked questions
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What is CVE-2022-50865?
CVE-2022-50865 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.9 onward and has been patched in 5.4.278, 5.10.153, 5.15.77 and others. CVE-2022-50865 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2022-50865?
Yes — CVE-2022-50865 has been patched. Fixed versions include 5.4.278, 5.10.153, 5.15.77 and others. If you are running Linux kernel 4.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2022-50865 actively exploited?
No — CVE-2022-50865 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.