CVE-2022-50870 — powerpc/rtas: avoid device tree lookups in rtas_os_term()
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]
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- EPSS 0.2% (30-day exploitation probability)+2
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
- No fix documented in the sources: reduce exposure and monitor the vendor advisory.
- Search available logs for exploit probes, errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Linux | Linux |
≥ 088186ded490ced80758200cf8f906ed741df306 and < e23822c7381c59d9e42e65771b6e17c71ed30ea7≥ 088186ded490ced80758200cf8f906ed741df306 and < 06a07fbb32b3a23eec20a42b1e64474da0a3b33e≥ 088186ded490ced80758200cf8f906ed741df306 and < c2fa91abf22a705cf02f886cd99cff41f4ceda60≥ 088186ded490ced80758200cf8f906ed741df306 and < f2167f10fcca68ab9ae3f8d94d2c704c5541ac69≥ 088186ded490ced80758200cf8f906ed741df306 and < d8939315b7342860df143afe0adda6212cdd3193≥ 088186ded490ced80758200cf8f906ed741df306 and < 698e682c849e356fb47a8be47ca8baa817cf31e0≥ 088186ded490ced80758200cf8f906ed741df306 and < 464d10e8d797454e16a173ef1292a446b2adf21c≥ 088186ded490ced80758200cf8f906ed741df306 and < ed2213bfb192ab51f09f12e9b49b5d482c6493f3 and 1 moreversion 2.6.16 |
Vulnerable | CVE Program (cve.org) e CISA ADP |
EPSS over time FIRST
Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.21%
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Not enough vector or weakness data: use the affected application’s logs as a starting point.
Timeline
What happened to this CVE, newest first.
- 2026
- Record published
- Affected products added · linux/linux
- Source status changed · → Deferred
- Record created in this database
- 2025
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 1× Official description updated · Oct 13, 2026 – Oct 13, 2026
References
8 on the record
- git.kernel.org/stable/c/698e682c849e356fb47a8be47ca8baa817cf31e0
- git.kernel.org/stable/c/f2167f10fcca68ab9ae3f8d94d2c704c5541ac69
- git.kernel.org/stable/c/ed2213bfb192ab51f09f12e9b49b5d482c6493f3
- git.kernel.org/stable/c/06a07fbb32b3a23eec20a42b1e64474da0a3b33e
- git.kernel.org/stable/c/d8939315b7342860df143afe0adda6212cdd3193
- git.kernel.org/stable/c/464d10e8d797454e16a173ef1292a446b2adf21c
- git.kernel.org/stable/c/c2fa91abf22a705cf02f886cd99cff41f4ceda60
- git.kernel.org/stable/c/e23822c7381c59d9e42e65771b6e17c71ed30ea7
Elsewhere on this site
Related CVEs (same products)
- Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 7h
- Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 7h
- Unknown CVE-2026-98431 RDMA/uverbs: Fix mmap_lock/disassociation_lock circular dependency 1d
- Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
- Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
- Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No CVSS score published by NVD, the CNA, CISA or GitHub so far.
- No fixed version, patch or mitigation documented.
- No CISA SSVC assessment.
- No CWE classification.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2022-50870 is "powerpc/rtas: avoid device tree lookups in rtas_os_term()", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.21% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
Comments
Moderated technical discussion. Read the community guidelines.
No comments yet.
Sign in or create an account to comment and suggest corrections.