CVE-2022-49726

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)

• CWE-908

• https://git.kernel.org/stable/c/0414eab7c78f3518143d383e448d44fc573ac6d2Patch
• https://git.kernel.org/stable/c/245b993d8f6c4e25f19191edfbd8080b645e12b1Patch
• https://git.kernel.org/stable/c/937fcbb55a1e48a6422e87e8f49422c92265f102Patch
• https://git.kernel.org/stable/c/cff3a7ce6e81418b6e8bac941779bbf5d342d626Patch
• https://git.kernel.org/stable/c/db965e2757d95f695e606856418cd84003dd036dPatch

Published

Feb 26, 2025

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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