In the Linux kernel, the following vulnerability has been resolved:
ipv6: fix possible infinite loop in fib6_select_path()
Found while auditing the same pattern Sashiko reported in rt6_fill_node() [1]. Apply the same fix as commit f8d8ce1b515a ("ipv6: fix possible infinite loop in fib6_info_uses_dev()").
Writers holding tb6_lock can list_del_rcu(&first->fib6_siblings) without waiting for RCU readers; first->fib6_siblings.next then still points into the old ring and this softirq-side walker never reaches &first->fib6_siblings as its terminator. fib6_purge_rt() always WRITE_ONCE()s first->fib6_nsiblings to 0 before list_del_rcu(), so an inside-loop check is a reliable detach signal.
[1] https://sashiko.dev/#/patchset/20260526020227.4857-1-jiayuan.chen%40linux.dev
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel-livepatch-6.12.94-123.174Upgrade kernel6.12-modules-extraUpgrade perf-debuginfoUpgrade kernel6.18-debuginfoUpgrade perf6.12-debuginfoUpgrade kernel-headersUpgrade kernel-tools-develUpgrade bpftool6.18-debuginfoUpgrade kernel6.18-toolsUpgrade kernel6.18-debuginfo-common-aarch64Upgrade kernel6.12-tools-develUpgrade perf6.18-debuginfoUpgrade bpftool6.12Upgrade kernel6.18-headersUpgrade kernel-livepatch-6.1.176-220.358Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel-debuginfoUpgrade bpftool6.12-debuginfoUpgrade kernel6.12-modules-extra-commonUpgrade kernel6.18-modules-extraUpgrade perfUpgrade kernel-debuginfo-common-aarch64Upgrade python3-perfUpgrade kernel6.12Upgrade kernel6.12-debuginfo-common-x86_64Upgrade perf6.18Upgrade bpftool6.18Upgrade kernel6.18-tools-develUpgrade kernel6.18-develUpgrade python3-perf6.12Upgrade kernel6.18Upgrade kernel6.12-tools-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-modules-extraUpgrade python3-perf-debuginfoUpgrade kernelUpgrade kernel6.18-tools-debuginfoUpgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel-debuginfo-common-x86_64Upgrade kernel6.18-modules-extra-commonUpgrade kernel6.12-develUpgrade kernel-toolsUpgrade python3-perf6.12-debuginfoUpgrade perf6.12Upgrade kernel6.12-toolsUpgrade kernel-modules-extra-commonUpgrade bpftool-debuginfoUpgrade python3-perf6.18-debuginfoUpgrade kernel6.12-headersUpgrade bpftoolUpgrade kernel-develUpgrade microvm-kernel6.18Upgrade kernel6.12-debuginfoUpgrade kernel-livepatch-6.18.35-68.127Upgrade python3-perf6.18 | Aug 10, 2026 | Jul 19, 2026 |
| Debian | — | Upgrade linux | Jul 20, 2026 | Jul 20, 2026 |
| Redhat_linux | — | No solution exists | Jul 23, 2026 | Jul 19, 2026 |
| Ubuntu | — | Upgrade linux-image-7.0.0-2016-nvidia-bos-64kUpgrade linux-image-nvidiaUpgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-azure-fde-7.0Upgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-nvidia-bos-64kUpgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-azure-fdeUpgrade linux-image-nvidia-bos-7.0Upgrade linux-image-raspiUpgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-ibm-7.0Upgrade linux-image-gcp-7.0Upgrade linux-image-7.0.0-1010-ibmUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-ibmUpgrade linux-image-7.0.0-1010-azureUpgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-azureUpgrade linux-image-7.0.0-1009-awsUpgrade linux-image-nvidia-64k-7.0Upgrade linux-image-oracle-7.0Upgrade linux-image-7.0.0-1011-oracleUpgrade linux-image-nvidia-7.0Upgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-aws-64k-7.0Upgrade linux-image-raspi-realtimeUpgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-7.0.0-2016-nvidia-bosUpgrade linux-image-oracle-64kUpgrade linux-image-7.0.0-1008-oracle-64kUpgrade linux-image-nvidia-64kUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-nvidia-bosUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-7.0.0-1016-nvidiaUpgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-7.0.0-1011-oracle-64kUpgrade linux-image-azure-7.0Upgrade linux-image-aws-7.0Upgrade linux-image-7.0.0-1014-azureUpgrade linux-image-raspi-7.0Upgrade linux-image-oracleUpgrade linux-image-awsUpgrade linux-image-7.0.0-1008-oracleUpgrade linux-image-aws-64kUpgrade linux-image-7.0.0-1016-nvidia-64kUpgrade linux-image-gcp-64kUpgrade linux-image-gcpUpgrade linux-image-7.0.0-1015-raspi | Jul 21, 2026 | Jul 20, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 27, 2026 | Jul 19, 2026 |
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