CVE-2022-50052: ASoC: Intel: avs: Fix potential buffer overflow by snprintf()
In the Linux kernel, the following vulnerability has been resolved:
ASoC: Intel: avs: Fix potential buffer overflow by snprintf()
snprintf() returns the would-be-filled size when the string overflows
the given buffer size, hence using this value may result in a buffer
overflow (although it's unrealistic).
This patch replaces it with a safer version, scnprintf() for papering
over such a potential issue.
Security readout for executives and security teams
Plain-English summary
This is a Linux kernel issue in Intel AVS audio driver code. A string formatting return value could be reused in a way that might overflow a buffer, though the kernel note calls exploitation unrealistic. Treat it as a routine kernel maintenance exposure unless affected systems are sensitive or internet-facing through other paths.
Executive priority
Handle through standard kernel patch management, not emergency response, unless internal validation shows affected kernels on high-value systems. The absence of severity scoring and exploitation evidence lowers urgency, but kernel flaws still warrant timely remediation discipline.
Technical view
The fix replaces snprintf() with scnprintf() in ASoC Intel avs code because snprintf() returns the would-have-written length on truncation. Using that value later can exceed the destination buffer size. Public data does not provide CVSS, CWE, attack vector, privileges, or a concrete exploit path.
Likely exposure
Exposure appears limited to Linux kernels identified in the source bundle, especially systems with the Intel AVS ASoC driver present or enabled. Downstream distribution exposure depends on kernel packaging and backported fixes, so version checks must be mapped against vendor kernel advisories.
Exploitation context
No CISA KEV listing is provided, and the source bundle does not cite active exploitation or public exploit code. The upstream description characterizes the overflow scenario as potential and unrealistic, so exploitation likelihood is unclear but appears low from available evidence.
Researcher notes
The public record is sparse: no CVSS, CWE, exploit conditions, or detailed affected downstream products are supplied. Analysis should focus on commit presence, driver reachability, and distribution backports rather than assuming broad practical exploitability.
Mitigation direction
Check whether deployed kernels include the referenced stable fixes.
Prioritize normal kernel updates from the operating system vendor.
Map vendor kernel package versions to upstream affected versions and fixes.
Monitor Linux distribution advisories for backported remediation details.
Validation and detection
Inventory systems running Linux kernel 5.19-series or related vendor builds.
Check whether Intel AVS ASoC driver code is built or loaded.
Confirm installed kernel changelogs include the snprintf-to-scnprintf fix.
Record exceptions where vendor guidance says the build is unaffected.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2022-50052 mapping review
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These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
0CVSS vectors
3Timeline events
0ADP providers
3Source links
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
CVE publishedCVE Program
The CVE record was published.
Jun 18, 2025, 11:01 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.