- Vulnerability/
- CVE-2024-27390
CVE-2024-27390: ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down()
First published: Wed May 01 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down() As discussed in the past (commit 2d3916f31891 ("ipv6: fix skb drops in igmp6_event_query() and igmp6_event_report()")) I think the synchronize_net() call in ipv6_mc_down() is not needed. Under load, synchronize_net() can last between 200 usec and 5 ms. KASAN seems to agree as well.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.11-1 6.12.12-1 |
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Reference Links
- https://git.kernel.org/stable/c/17ef8efc00b34918b966388b2af0993811895a8c
- https://git.kernel.org/stable/c/26d4bac55750d535f1f0b8790dc26daf6089e373
- https://git.kernel.org/stable/c/5da9a218340a2bc804dc4327e5804392e24a0b88
- https://git.kernel.org/stable/c/7eb06ee5921189812e6b4bfe7b0f1e878be16df7
- https://git.kernel.org/stable/c/9d159d6637ccce25f879d662a480541ef4ba3a50
- https://git.kernel.org/stable/c/a03ede2282ebbd181bd6f5c38cbfcb5765afcd04
- https://launchpad.net/bugs/cve/CVE-2024-27390
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27390
- https://nvd.nist.gov/vuln/detail/CVE-2024-27390
- https://security-tracker.debian.org/tracker/CVE-2024-27390
- https://ubuntu.com/security/CVE-2024-27390
- https://git.kernel.org/linus/17ef8efc00b34918b966388b2af0993811895a8c
Frequently Asked Questions
What is the severity of CVE-2024-27390?
CVE-2024-27390 has been categorized based on the potential impact on system security and performance, typically rated as low to medium severity.
How do I fix CVE-2024-27390?
To fix CVE-2024-27390, you should upgrade to one of the patched Linux kernel versions, such as 5.10.223-1 or 6.12.11-1.
Which Linux kernel versions are affected by CVE-2024-27390?
CVE-2024-27390 affects Linux kernel versions before the patches were released, specifically versions earlier than 5.10.223-1 and 6.12.11-1.
What component of the Linux kernel is affected by CVE-2024-27390?
CVE-2024-27390 specifically affects the IPv6 multicast component of the Linux kernel.
Is there a workaround for CVE-2024-27390?
Currently, there is no publicly recommended workaround for CVE-2024-27390, and updating the kernel is the advised mitigation.
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