CVE-2026-74438
Vulnerability Scoring
Analysis In Progress
CVE-2026-74438 Vulnerability Analysis & Exploit Details
CVE-2026-74438
Attack Complexity Details
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Attack Complexity:
Attack Complexity Analysis In Progress
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Attack Vector:
Attack Vector Under Analysis
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Privileges Required:
None
No authentication is required for exploitation.
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Scope:
Impact is confined to the initially vulnerable component.
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User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2026-74438 Details
Status: Received on 15 Aug 2026, 06:22 UTC
Published on: 15 Aug 2026, 06:22 UTC
CVSS Release:
CVE-2026-74438 Vulnerability Summary
CVE-2026-74438: In the Linux kernel, the following vulnerability has been resolved: crypto: sun4i-ss - Remove insecure and unused rng_alg Remove sun4i_ss_rng, as it is insecure and unused: - It has multiple vulnerabilities. sun4i_ss_prng_seed() is missing locking and has a buffer overflow. sun4i_ss_prng_generate() fails to fill the entire buffer with cryptographic random bytes, because it rounds the destination length down and also doesn't actually wait for the hardware to be ready before pulling bytes from it. - No user of this code is known. It's usable only theoretically via the "rng" algorithm type of AF_ALG. But userspace actually just uses the actual Linux RNG (/dev/random etc) instead. And rng_algs don't contribute entropy to the actual Linux RNG either. (This may have been confused with hwrng, which does contribute entropy.) The sun4i_ss_prng_seed() buffer overflow was reported by Tianchu Chen and discovered by Atuin - Automated Vulnerability Discovery Engine There's no point in fixing all these vulnerabilities individually when this is unused code, so let's just remove it.
Assessing the Risk of CVE-2026-74438
Access Complexity Graph
The exploitability of CVE-2026-74438 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).
Exploitability Analysis for CVE-2026-74438
No exploitability data is available for CVE-2026-74438.
Understanding AC and PR
A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.
Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.
Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.
CVSS Score Breakdown Chart
Above is the CVSS Sub-score Breakdown for CVE-2026-74438, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.
CIA Impact Analysis
Below is the Impact Analysis for CVE-2026-74438, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
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Confidentiality:
None
CVE-2026-74438 does not compromise confidentiality.
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Integrity:
None
CVE-2026-74438 does not impact data integrity.
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Availability:
None
CVE-2026-74438 does not affect system availability.
CVE-2026-74438 References
External References
- https://git.kernel.org/stable/c/2eafecaba1b46bb9774eaf3556619fd5b6a17c1c
- https://git.kernel.org/stable/c/306ded31bfa00a69d25823a60d7c797170bfb4f8
- https://git.kernel.org/stable/c/9c8086d9511189c34dfa3f9e3a03f2bee12f56a5
- https://git.kernel.org/stable/c/b2c41fa9dd8fc740c489e060b199165771f268d1
- https://git.kernel.org/stable/c/c401492e01c7bfd38cf14c94d85c7efafe7d1a25
- https://git.kernel.org/stable/c/e4b7b9819811c4c51064c3d3d3c02f0be7491707
- https://git.kernel.org/stable/c/ee2458f8188732aa53a5d42f56e87bfad288b44e
CWE Common Weakness Enumeration
Unknown
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