Request hang via non-word-sized random reads
Published Mar 5, 2024 · Updated May 23, 2026
Infinite loop in the Qualcomm RNG driver in affected Linux kernels allows local users to hang random-number requests with non-word-sized input. The qcom_rng_read() loop omits a break when the requested byte count is not a multiple of WORD_SZ, so its residual-byte branch never exits. Exploitation requires local access to a system using the Qualcomm RNG driver and can indefinitely consume execution in the request path.
Summary
What happened
Infinite loop in the Qualcomm RNG driver in affected Linux kernels allows local users to hang random-number requests with non-word-sized input. The qcom_rng_read() loop omits a break when the requested byte count is not a multiple of WORD_SZ, so its residual-byte branch never exits. Exploitation requires local access to a system using the Qualcomm RNG driver and can indefinitely consume execution in the request path.
The record
- CVE
- CVE-2022-48630
- Published
- Mar 5, 2024
- Updated
- May 23, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-835, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 5, 2024CVE publishedPublication date reported by the CVE source.
- May 23, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0f9b7b8df17525e464294c916acc8194ce38446b <233a3cc60e7a8fe0be8cf9934ae7b67ba25a866c
- Affected versionversion=184f7bd08ce56f003530fc19f160d54e75bf5c9d <8be06f62b426801dba43ddf8893952a0e62ab6ae
- Affected versionversion=4.19.236 <4.19.245
- Affected versionversion=485995cbc98a4f77cfd4f8ed4dd7ff8ab262964d
- Affected versionversion=5.10.108 <5.10.118
- Affected versionversion=5.15.31 <5.15.42
- Affected versionversion=5.16.17 <5.17
- Affected versionversion=5.17
- Affected versionversion=5.4.187 <5.4.196
- Affected versionversion=a680b1832ced3b5fa7c93484248fd221ea0d614b <05d4d17475d8d094c519bb51658bc47899c175e3
- Affected versionversion=a680b1832ced3b5fa7c93484248fd221ea0d614b <16287397ec5c08aa58db6acf7dbc55470d78087d
- Affected versionversion=a8e32bbb96c25b7ab29b1894dcd45e0b3b08fd9d <71a89789552b7faf3ef27969b9bc783fa0df3550
- Affected versionversion=ab9337c7cb6f875b6286440b1adfbeeef2b2b2bd <8a06f25f5941c145773204f2f7abef95b4ffb8ce
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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