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7.8
HIGH CVSS 3.1
CVE-2026-64311
crypto: loongson - Remove broken and unused loongson-rng
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: crypto: loongson - Remove broken and unused loongson-rng The loongson-rng rng_alg has several vulnerabilities, including not providing forward security, and a use-after-free bug due to the use of wait_for_completion_interruptible(). Meanwhile, the rng_alg framework doesn't really have any purpose in the first place other than to access the software algorithms crypto/drbg.c and crypto/jitterentropy.c. Hardware-specific rng_algs have no in-kernel user, and unlike hwrng there's no feed into the actual Linux RNG. As such, there's really no point to this code. There are of course other rng_alg drivers that are similarly unused, but they're similarly in the process of being phased out, e.g. https://lore.kernel.org/r/[email protected] and https://lore.kernel.org/r/[email protected] Given that, there's no point in fixing forward these vulnerabilities, and it makes much more sense to simply roll back the addition of this driver. If this platform provides TRNG (not PRNG) functionality, it could make sense to add a hwrng driver, but it would be quite different.

Details
INFO

Published Date :

July 25, 2026, 10:17 a.m.

Last Modified :

Aug. 17, 2026, 5:17 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-64311 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Remove the unused loongson-rng driver to address vulnerabilities.
  • Remove the loongson-rng driver code.
  • Do not implement PRNG functionality.
  • Consider a hwrng driver for TRNG.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-64311.

URL Resource
https://git.kernel.org/stable/c/037ec8353711c79353b12d5634e0c9ff363a9efa
https://git.kernel.org/stable/c/43de8b9f01b7dd2f6ca5360c6bf2f203c02288dc
https://git.kernel.org/stable/c/af3d1bb9a09daf928fc3f173689fb7904d6a6d4f
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-64311 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-64311 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-64311 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-64311 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '766b2d724c8df071031412eea902b566a0049c31', 'lessThan': '037ec8353711c79353b12d5634e0c9ff363a9efa', 'versionType': 'git'}, {'status': 'affected', 'version': '766b2d724c8df071031412eea902b566a0049c31', 'lessThan': '43de8b9f01b7dd2f6ca5360c6bf2f203c02288dc', 'versionType': 'git'}, {'status': 'affected', 'version': '766b2d724c8df071031412eea902b566a0049c31', 'lessThan': 'af3d1bb9a09daf928fc3f173689fb7904d6a6d4f', 'versionType': 'git'}], 'programFiles': ['MAINTAINERS', 'arch/loongarch/configs/loongson32_defconfig', 'arch/loongarch/configs/loongson64_defconfig', 'drivers/crypto/Kconfig', 'drivers/crypto/Makefile', 'drivers/crypto/loongson/Kconfig', 'drivers/crypto/loongson/Makefile', 'drivers/crypto/loongson/loongson-rng.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['MAINTAINERS', 'arch/loongarch/configs/loongson32_defconfig', 'arch/loongarch/configs/loongson64_defconfig', 'drivers/crypto/Kconfig', 'drivers/crypto/Makefile', 'drivers/crypto/loongson/Kconfig', 'drivers/crypto/loongson/Makefile', 'drivers/crypto/loongson/loongson-rng.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '766b2d724c8df071031412eea902b566a0049c31', 'lessThan': '037ec8353711c79353b12d5634e0c9ff363a9efa', 'versionType': 'git'}, {'status': 'affected', 'version': '766b2d724c8df071031412eea902b566a0049c31', 'lessThan': '43de8b9f01b7dd2f6ca5360c6bf2f203c02288dc', 'versionType': 'git'}, {'status': 'affected', 'version': '766b2d724c8df071031412eea902b566a0049c31', 'lessThan': 'af3d1bb9a09daf928fc3f173689fb7904d6a6d4f', 'versionType': 'git'}], 'programFiles': ['MAINTAINERS', 'arch/loongarch/configs/loongson32_defconfig', 'arch/loongarch/configs/loongson64_defconfig', 'drivers/crypto/Kconfig', 'drivers/crypto/Makefile', 'drivers/crypto/loongson/Kconfig', 'drivers/crypto/loongson/Makefile', 'drivers/crypto/loongson/loongson-rng.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['MAINTAINERS', 'arch/loongarch/configs/loongson32_defconfig', 'arch/loongarch/configs/loongson64_defconfig', 'drivers/crypto/Kconfig', 'drivers/crypto/Makefile', 'drivers/crypto/loongson/Kconfig', 'drivers/crypto/loongson/Makefile', 'drivers/crypto/loongson/loongson-rng.c'], 'defaultStatus': 'affected'}]
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 27, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 25, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '766b2d724c8df071031412eea902b566a0049c31', 'lessThan': '037ec8353711c79353b12d5634e0c9ff363a9efa', 'versionType': 'git'}, {'status': 'affected', 'version': '766b2d724c8df071031412eea902b566a0049c31', 'lessThan': '43de8b9f01b7dd2f6ca5360c6bf2f203c02288dc', 'versionType': 'git'}, {'status': 'affected', 'version': '766b2d724c8df071031412eea902b566a0049c31', 'lessThan': 'af3d1bb9a09daf928fc3f173689fb7904d6a6d4f', 'versionType': 'git'}], 'programFiles': ['MAINTAINERS', 'arch/loongarch/configs/loongson32_defconfig', 'arch/loongarch/configs/loongson64_defconfig', 'drivers/crypto/Kconfig', 'drivers/crypto/Makefile', 'drivers/crypto/loongson/Kconfig', 'drivers/crypto/loongson/Makefile', 'drivers/crypto/loongson/loongson-rng.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['MAINTAINERS', 'arch/loongarch/configs/loongson32_defconfig', 'arch/loongarch/configs/loongson64_defconfig', 'drivers/crypto/Kconfig', 'drivers/crypto/Makefile', 'drivers/crypto/loongson/Kconfig', 'drivers/crypto/loongson/Makefile', 'drivers/crypto/loongson/loongson-rng.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: crypto: loongson - Remove broken and unused loongson-rng The loongson-rng rng_alg has several vulnerabilities, including not providing forward security, and a use-after-free bug due to the use of wait_for_completion_interruptible(). Meanwhile, the rng_alg framework doesn't really have any purpose in the first place other than to access the software algorithms crypto/drbg.c and crypto/jitterentropy.c. Hardware-specific rng_algs have no in-kernel user, and unlike hwrng there's no feed into the actual Linux RNG. As such, there's really no point to this code. There are of course other rng_alg drivers that are similarly unused, but they're similarly in the process of being phased out, e.g. https://lore.kernel.org/r/[email protected] and https://lore.kernel.org/r/[email protected] Given that, there's no point in fixing forward these vulnerabilities, and it makes much more sense to simply roll back the addition of this driver. If this platform provides TRNG (not PRNG) functionality, it could make sense to add a hwrng driver, but it would be quite different.
    Added Reference https://git.kernel.org/stable/c/037ec8353711c79353b12d5634e0c9ff363a9efa
    Added Reference https://git.kernel.org/stable/c/43de8b9f01b7dd2f6ca5360c6bf2f203c02288dc
    Added Reference https://git.kernel.org/stable/c/af3d1bb9a09daf928fc3f173689fb7904d6a6d4f
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact