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kernel: ipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_init_flow()

🗓️ 13 May 2025 08:28:50Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 6 Views

Fix suspicious read-copy-update usage in ip_tunnel_init_flow by acquiring the RCU lock via master_upper_index function.

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Refs
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nessus
Tenable Nessus		Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2025-802)
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Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2025-078 (ALASKERNEL-5.10-2025-078)
24 Jan 202500:00
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Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2025-060 (ALASKERNEL-5.15-2025-060)
10 Jan 202500:00
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Tenable Nessus		Debian dla-4008 : linux-config-6.1 - security update
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nessus
Tenable Nessus		Debian dla-4075 : ata-modules-5.10.0-29-armmp-di - security update
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nessus
Tenable Nessus		Debian dsa-5818 : affs-modules-6.1.0-21-4kc-malta-di - security update
24 Nov 202400:00
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Tenable Nessus		MiracleLinux 9 : kernel-5.14.0-570.12.1.el9_6 (AXSA:2025-10392:38)
13 Jan 202600:00
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nessus
Tenable Nessus		Oracle Linux 8 / 9 : Unbreakable Enterprise kernel (ELSA-2024-12887)
18 Dec 202400:00
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nessus
Tenable Nessus		Oracle Linux 9 : kernel (ELSA-2025-6966)
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Tenable Nessus		Photon OS 5.0: Linux PHSA-2024-5.0-0407
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.6aarch64kernel5.14.0-570.12.1.el9_6kernel-5.14.0-570.12.1.el9_6.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64lekernel5.14.0-570.12.1.el9_6kernel-5.14.0-570.12.1.el9_6.ppc64le.rpm
Red Hat Enterprise Linux9.6s390xkernel5.14.0-570.12.1.el9_6kernel-5.14.0-570.12.1.el9_6.s390x.rpm
Red Hat Enterprise Linux9.6x86_64kernel5.14.0-570.12.1.el9_6kernel-5.14.0-570.12.1.el9_6.x86_64.rpm
Red Hat Enterprise Linux9.6aarch64kernel-64k5.14.0-570.12.1.el9_6kernel-64k-5.14.0-570.12.1.el9_6.aarch64.rpm
Red Hat Enterprise Linux9.6aarch64kernel-64k-core5.14.0-570.12.1.el9_6kernel-64k-core-5.14.0-570.12.1.el9_6.aarch64.rpm
Red Hat Enterprise Linux9.6aarch64kernel-64k-debug5.14.0-570.12.1.el9_6kernel-64k-debug-5.14.0-570.12.1.el9_6.aarch64.rpm
Red Hat Enterprise Linux9.6aarch64kernel-64k-debug-core5.14.0-570.12.1.el9_6kernel-64k-debug-core-5.14.0-570.12.1.el9_6.aarch64.rpm
Red Hat Enterprise Linux9.6aarch64kernel-64k-debug-debuginfo5.14.0-570.12.1.el9_6kernel-64k-debug-debuginfo-5.14.0-570.12.1.el9_6.aarch64.rpm
Red Hat Enterprise Linux9.6aarch64kernel-64k-debug-devel5.14.0-570.12.1.el9_6kernel-64k-debug-devel-5.14.0-570.12.1.el9_6.aarch64.rpm
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25 Aug 2026 14:50Current
6.8Medium risk
Vulners AI Score6.8
CVSS 3.15.5
EPSS0.00265
SSVC
CWE-662
ipv4ip tunnelread side warninglock acquisitionmaster upper index
6