Bug 2347975 (CVE-2022-49589)

Summary: CVE-2022-49589 kernel: igmp: Fix data-races around sysctl_igmp_qrv.
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-02-26 03:13:15 UTC 
In the Linux kernel, the following vulnerability has been resolved:

igmp: Fix data-races around sysctl_igmp_qrv.

While reading sysctl_igmp_qrv, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its readers.

This test can be packed into a helper, so such changes will be in the
follow-up series after net is merged into net-next.

  qrv ?: READ_ONCE(net->ipv4.sysctl_igmp_qrv);
Comment 1 Avinash Hanwate 2025-02-26 11:03:42 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022609-CVE-2022-49589-fb90@gregkh/T
Comment 4 Avinash Hanwate 2025-02-26 15:32:45 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022609-CVE-2022-49589-fb90@gregkh/T