CVE-2022-50764
In the Linux kernel, the following vulnerability has been resolved: ipv6/sit: use DEV_STATS_INC() to avoid data-races syzbot/KCSAN reported that multiple cpus are updating dev->stats.tx_error concurrently. This is because sit tunnels are NETIF_F_LLTX, meaning their ndo_start_xmit() is not protected by a spinlock. While original KCSAN report was about tx path, rx path has the same issue.
Affected versions
Linux kernel versions
2.6.37
and later are affected. Fixed in
5.15.86,
6.0.16,
6.1.2,
6.2
and their respective stable series.
References
The following references provide additional information about CVE-2022-50764 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/207501a986831174df09a36a8cb62a28f92f0dc8
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PatchKernel patch commithttps://git.kernel.org/stable/c/222cc04356984f3f98acfa756a69d4bed7c501ac
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PatchKernel patch commithttps://git.kernel.org/stable/c/4eed93bb3e57b8cc78d17166a14e40a73276015a
Frequently asked questions
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What is CVE-2022-50764?
CVE-2022-50764 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.37 onward and has been patched in 5.15.86, 6.0.16, 6.1.2 and others. CVE-2022-50764 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-2022-50764?
Yes — CVE-2022-50764 has been patched. Fixed versions include 5.15.86, 6.0.16, 6.1.2 and others. If you are running Linux kernel 2.6.37 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2022-50764 actively exploited?
No — CVE-2022-50764 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.