Bug 1228038 (CVE-2022-48816) - VUL-0: CVE-2022-48816: kernel: SUNRPC: lock against ->sock changing during sysfs read
Summary: VUL-0: CVE-2022-48816: kernel: SUNRPC: lock against ->sock changing during sy...
Status: RESOLVED FIXED
Alias: CVE-2022-48816
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: Other Other
: P3 - Medium : Normal
Target Milestone: ---
Assignee: Security Team bot
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/414239/
Whiteboard: CVSSv3.1:SUSE:CVE-2022-48816:4.7:(AV:...
Keywords:
Depends on:
Blocks:
 
Reported: 2024-07-17 10:19 UTC by SMASH SMASH
Modified: 2024-07-17 14:57 UTC (History)
2 users (show)

See Also:
Found By: Security Response Team
Services Priority:
Business Priority:
Blocker: ---
Marketing QA Status: ---
IT Deployment: ---

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description SMASH SMASH 2024-07-17 10:19:42 UTC 
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.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-48816
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2022/CVE-2022-48816.mbox
https://git.kernel.org/stable/c/9482ab4540f5bcc869b44c067ae99b5fca16bd07
https://git.kernel.org/stable/c/b49ea673e119f59c71645e2f65b3ccad857c90ee
https://www.cve.org/CVERecord?id=CVE-2022-48816
https://bugzilla.redhat.com/show_bug.cgi?id=2298155