In the Linux kernel, the following vulnerability has been resolved:
clocksource: hyper-v: unexport __init-annotated hv_init_clocksource()
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 has been broken for a decade.
Recently, I fixed modpost so it started to warn it again, then this showed up in linux-next builds.
There are two ways to fix it:
- Remove __init - Remove EXPORT_SYMBOL
I chose the latter for this case because the only in-tree call-site, arch/x86/kernel/cpu/mshyperv.c is never compiled as modular. (CONFIG_HYPERVISOR_GUEST is boolean)
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 kernel-develUpgrade perf-debuginfoUpgrade kernel-livepatch-5.15.50-23.125Upgrade kernel-tools-develUpgrade kernel-debuginfoUpgrade kernelUpgrade kernel-tools-debuginfoUpgrade python-perf-debuginfoUpgrade perfUpgrade kernel-headersUpgrade kernel-livepatch-5.10.126-117.518Upgrade python-perfUpgrade bpftool-debuginfoUpgrade bpftoolUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-toolsUpgrade kernel-debuginfo-common-x86_64 | 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-tools-libsUpgrade kernel-toolsUpgrade bpftoolUpgrade kernelUpgrade python3-perf | Jul 1, 2025 | Feb 26, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-kvmUpgrade linux-hwe-5.15Upgrade linux-azure-5.15Upgrade linux-nvidiaUpgrade linux-gcp-fipsUpgrade linux-oracleUpgrade linux-riscv-5.15Upgrade linux-gcp-5.15Upgrade linux-realtimeUpgrade linux-intel-iotg-5.15Upgrade linux-azureUpgrade linux-azure-5.4Upgrade linux-hwe-5.4Upgrade linux-gkeopUpgrade linux-oracle-5.15Upgrade linux-intel-iotgUpgrade linux-aws-fipsUpgrade linux-fipsUpgrade linux-iotUpgrade linux-ibmUpgrade linux-azure-fipsUpgrade linux-lowlatencyUpgrade linux-gcp-5.4Upgrade linux-raspi-5.4Upgrade linux-aws-5.15Upgrade linux-aws-5.4Upgrade linux-bluefieldUpgrade linuxUpgrade linux-gkeUpgrade linux-ibm-5.4Upgrade linux-awsUpgrade linux-lowlatency-hwe-5.15Upgrade linux-raspiUpgrade linux-gcpUpgrade linux-oracle-5.4 | Mar 3, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Feb 26, 2025 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub