CVE-2022-49350
In the Linux kernel, the following vulnerability has been resolved: net: mdio: unexport __init-annotated mdio_bus_init() EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization.
Does this matter?
Lower severity and a low EPSS score (0.28%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: net: mdio: unexport __init-annotated mdio_bus_init() 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, drivers/net/phy/phy_device.c is never compiled as modular. (CONFIG_PHYLIB is boolean)
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.28% probability · 21th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-908
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/35b42dce619701f1300fb8498dae82c9bb1f0263Patch
- https://git.kernel.org/stable/c/5534bcd7c40299862237c4a8fd9c5031b3db1538Patch
- https://git.kernel.org/stable/c/59fa94cddf9eef8d8dae587373eed8b8f4eb11d7Patch
- https://git.kernel.org/stable/c/6a90a44d53428a3bf01bd80df9ba78b19959270cPatch
- https://git.kernel.org/stable/c/7759c3222815b945a94b212bc0c6cdec475cfec2Patch
- https://git.kernel.org/stable/c/ab64ec2c75683f30ccde9eaaf0761002f901aa12Patch
- https://git.kernel.org/stable/c/f2f0f8c18b60ca64ff50892ed899cf1c77864755Patch
- https://git.kernel.org/stable/c/f5c68137f1191ba3fcf6260ec71b30be2e2bf4c3Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.