What’s Vulnerable › Vulnerabilities

CVE-2022-48816: SUNRPC: lock against ->sock changing during sysfs read

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-16 · updated 2026-10-03
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: lock against ->sock changing during sysfs read ->sock can be set to NULL asynchronously unless ->recv_mutex is held. So it is important to hold that mutex. Otherwise a sysfs read can trigger an oops. Commit 17f09d3f619a ("SUNRPC: Check if the xprt is connected before handling sysfs reads") appears to attempt to fix this problem, but it only narrows the race window.

Affected products

• Linux kernel: from 5.10.67 before 5.11; from 5.13.19 before 5.16.10; 5.17-rc1, 5.17-rc2, 5.17-rc3 — fixed in 5.11, 5.16.10

How to fix

Upgrade to a fixed version: Linux kernel 5.11, 5.16.10. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/9482ab4540f5bcc869b44c067ae99b5fca16bd07
• https://git.kernel.org/stable/c/b49ea673e119f59c71645e2f65b3ccad857c90ee
• https://git.kernel.org/stable/c/cd366b9091a3e6ed8229e4b908e895d20b527dc0
• https://git.kernel.org/stable/c/fdc42287ae3f8a35cc2098307f52d7864b4bc8ed
• https://git.kernel.org/stable/c/9482ab4540f5bcc869b44c067ae99b5fca16bd07
• https://git.kernel.org/stable/c/b49ea673e119f59c71645e2f65b3ccad857c90ee

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