# CVE-2024-27390: linux: In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: remove one synchronize_net() barrie... CVE-2024-27390 is fixed in 22 products on 1 platform, first by DEBIAN-CVE-2024-27390, released May 1, 2024. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2024-27390 - Priority: Routine - CVSS: 5.5 (medium) - EPSS: 0.0022 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: May 1, 2024 ## Description 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. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | bpftool-debuginfo amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-debuginfo amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-devel amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-headers amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-libbpf amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-libbpf-devel amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-libbpf-static amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-livepatch-6.1.84-99.169 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-modules-extra amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-modules-extra-common amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-tools amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-tools-debuginfo amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | kernel-tools-devel amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | linux Debian 12.15 (bookworm) | 6.1.85-1 | [DEBIAN-CVE-2024-27390](https://patchblox.com/security/data/fix/linux/debian-cve-2024-27390.md) | May 1, 2024 | | Linux | linux Debian 13.5 (trixie) | 6.7.12-1 | [DEBIAN-CVE-2024-27390](https://patchblox.com/security/data/fix/linux/debian-cve-2024-27390.md) | May 1, 2024 | | Linux | linux Debian 14 | 6.7.12-1 | [DEBIAN-CVE-2024-27390](https://patchblox.com/security/data/fix/linux/debian-cve-2024-27390.md) | May 1, 2024 | | Linux | perf amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | perf-debuginfo amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | python3-perf amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | | Linux | python3-perf-debuginfo amzn 2023 | 6.1.84-99.169.amzn2023 | [ALAS2023-2024-696](https://patchblox.com/security/data/fix/linux/alas2023-2024-696.md) | Aug 1, 2024 | --- Data as of 2026-11-09T13:31:49Z UTC. 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