CVE-2022-50870

powerpc/rtas: avoid device tree lookups in rtas_os_term()

N/A

Published: December 30, 2025 at 12:15 PM UTC

Updated: June 17, 2026 at 05:24 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

N/A

Exploit prediction

EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/rtas: avoid device tree lookups in rtas_os_term() rtas_os_term() is called during panic. Its behavior depends on a couple of conditions in the /rtas node of the device tree, the traversal of which entails locking and local IRQ state changes. If the kernel panics while devtree_lock is held, rtas_os_term() as currently written could hang. Instead of discovering the relevant characteristics at panic time, cache them in file-static variables at boot. Note the lookup for "ibm,extended-os-term" is converted to of_property_read_bool() since it is a boolean property, not an RTAS function token. [mpe: Incorporate suggested change from Nick]

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

2.6.16 ≤ v < 4.14.3032.6.16 ≤ v < 4.19.2702.6.16 ≤ v < 5.10.1632.6.16 ≤ v < 5.15.872.6.16 ≤ v < 5.4.2292.6.16 ≤ v < 6.0.172.6.16 ≤ v < 6.1.32.6.16 ≤ v < 6.22.6.1688186ded490ced80758200cf8f906ed741df306

Vendor states this is fixed in 06a07fbb32b3a23eec20a42b1e64474da0a3b33e (fixed)

Vendor states this is fixed in 464d10e8d797454e16a173ef1292a446b2adf21c (fixed)

Vendor states this is fixed in 698e682c849e356fb47a8be47ca8baa817cf31e0 (fixed)

Vendor states this is fixed in c2fa91abf22a705cf02f886cd99cff41f4ceda60 (fixed)

Vendor states this is fixed in d8939315b7342860df143afe0adda6212cdd3193 (fixed)

Vendor states this is fixed in e23822c7381c59d9e42e65771b6e17c71ed30ea7 (fixed)

Vendor states this is fixed in ed2213bfb192ab51f09f12e9b49b5d482c6493f3 (fixed)

Vendor states this is fixed in f2167f10fcca68ab9ae3f8d94d2c704c5541ac69 (fixed)

Vendor states this is fixed in 2.6.16 (unaffected)

Vendor states this is fixed in 4.14.303 (unaffected)

Vendor states this is fixed in 4.19.270 (unaffected)

Vendor states this is fixed in 5.10.163 (unaffected)