In the Linux kernel, the following vulnerability has been resolved:
tick/nohz: unexport __init-annotated tick_nohz_full_setup()
EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic.
modpost used to detect it, but it had been broken for a decade.
Commit 28438794aba4 ("modpost: fix section mismatch check for exported init/exit sections") fixed it so modpost started to warn it again, then this showed up:
MODPOST vmlinux.symvers WARNING: modpost: vmlinux.o(___ksymtab_gpl+tick_nohz_full_setup+0x0): Section mismatch in reference from the variable __ksymtab_tick_nohz_full_setup to the function .init.text:tick_nohz_full_setup() The symbol tick_nohz_full_setup is exported and annotated __init Fix this by removing the __init annotation of tick_nohz_full_setup or drop the export.
Drop the export because tick_nohz_full_setup() is only called from the built-in code in kernel/sched/isolation.c.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade bpftool-debuginfoUpgrade bpftoolUpgrade python-perfUpgrade kernel-livepatch-5.10.130-118.517Upgrade kernel-debuginfo-common-x86_64Upgrade kernel-toolsUpgrade kernel-headersUpgrade perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-debuginfoUpgrade kernel-tools-develUpgrade perfUpgrade kernel-debuginfoUpgrade kernel-livepatch-5.15.54-25.126Upgrade python-perf-debuginfoUpgrade kernelUpgrade kernel-devel | May 22, 2025 | Feb 26, 2025 |
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade kernelUpgrade python3-perfUpgrade kernel-tools-libsUpgrade bpftool | Jul 1, 2025 | Feb 26, 2025 |
| Redhat_linux | — | Upgrade kernel-rtUpgrade kernelNo solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-intel-iotgUpgrade linux-nvidiaUpgrade linux-riscv-5.15Upgrade linux-lowlatencyUpgrade linux-aws-5.15Upgrade linux-gkeUpgrade linux-oracleUpgrade linux-oracle-5.15Upgrade linux-gcpUpgrade linux-awsUpgrade linuxUpgrade linux-intel-iotg-5.15Upgrade linux-hwe-5.15Upgrade linux-gcp-5.15Upgrade linux-kvmUpgrade linux-gkeopUpgrade linux-azureUpgrade linux-lowlatency-hwe-5.15Upgrade linux-azure-5.15Upgrade linux-realtimeUpgrade linux-raspiUpgrade linux-azure-fdeUpgrade linux-ibm | Mar 19, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Feb 26, 2025 |
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