CVE-2022-49590: igmp: Fix data-races around sysctl_igmp_llm_reports.
First published: Wed Feb 26 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: igmp: Fix data-races around sysctl_igmp_llm_reports. While reading sysctl_igmp_llm_reports, 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. if (ipv4_is_local_multicast(pmc->multiaddr) && !READ_ONCE(net->ipv4.sysctl_igmp_llm_reports))
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| >=4.3<4.9.325 | ||
| >=4.10<4.14.290 | ||
| >=4.15<4.19.254 | ||
| >=4.20<5.4.208 | ||
| >=5.5<5.10.134 | ||
| >=5.11<5.15.58 | ||
| >=5.16<5.18.15 | ||
| =5.19-rc1 | ||
| =5.19-rc2 | ||
| =5.19-rc3 | ||
| =5.19-rc4 | ||
| =5.19-rc5 | ||
| =5.19-rc6 | ||
| =5.19-rc7 |
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Reference Links
- https://git.kernel.org/stable/c/a84b4afaca2573ed3aed1f8854aefe3ca5a82e72
- https://git.kernel.org/stable/c/d77969e7d4ccc26bf1f414a39ef35050a83ba6d5
- https://git.kernel.org/stable/c/ed876e99ccf417b8bd7fd8408ba5e8b008e46cc8
- https://git.kernel.org/stable/c/1656ecaddf90e2a070ec2d2404cdae3edf80faca
- https://git.kernel.org/stable/c/473aad9ad57ff760005377e6f45a2ad4210e08ce
- https://git.kernel.org/stable/c/260446eb8e5541402b271343a4516f2b33dec1e4
- https://git.kernel.org/stable/c/46307adceb67bdf2ec38408dd9cebc378a6b5c46
- https://git.kernel.org/stable/c/f6da2267e71106474fbc0943dc24928b9cb79119
Frequently Asked Questions
What is the severity of CVE-2022-49590?
CVE-2022-49590 has a severity rating of medium due to the potential for data races affecting system stability.
How do I fix CVE-2022-49590?
To fix CVE-2022-49590, update your Linux kernel to a version where the vulnerability has been resolved.
What systems are affected by CVE-2022-49590?
CVE-2022-49590 affects multiple versions of the Linux kernel from 4.3 to 5.19-rc7.
What are the potential impacts of CVE-2022-49590?
The potential impact of CVE-2022-49590 includes system instability due to concurrent modifications of sysctl_igmp_llm_reports.
Is there a patch available for CVE-2022-49590?
Yes, patches for CVE-2022-49590 are available in the latest releases of the affected Linux kernel versions.
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