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CVE-2022-50870

UnknownEPSS 0.18%

Last modified

CVE-2022-50870 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

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]

Metrics

EPSS Probability
0.18%

7.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 088186ded490ced80758200cf8f906ed741df306, < e23822c7381c59d9e42e65771b6e17c71ed30ea7; >= 088186ded490ced80758200cf8f906ed741df306, < 06a07fbb32b3a23eec20a42b1e64474da0a3b33e; >= 088186ded490ced80758200cf8f906ed741df306, < c2fa91abf22a705cf02f886cd99cff41f4ceda60; >= 088186ded490ced80758200cf8f906ed741df306, < f2167f10fcca68ab9ae3f8d94d2c704c5541ac69; >= 088186ded490ced80758200cf8f906ed741df306, < d8939315b7342860df143afe0adda6212cdd3193; >= 088186ded490ced80758200cf8f906ed741df306, < 698e682c849e356fb47a8be47ca8baa817cf31e0; >= 088186ded490ced80758200cf8f906ed741df306, < 464d10e8d797454e16a173ef1292a446b2adf21c; >= 088186ded490ced80758200cf8f906ed741df306, < ed2213bfb192ab51f09f12e9b49b5d482c6493f3
LinuxLinux2.6.16

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2022-50870?
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]
How severe is CVE-2022-50870?
Severity scoring for CVE-2022-50870 is pending analysis. The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2022-50870?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST