A memory leak vulnerability was identified and fixed in the Linux kernel's MediaTek SVS driver. (CVE-2026-45881)
A memory leak vulnerability was identified and fixed in the Linux kernel's MediaTek SVS driver. The issue occurred in the svs_enable_debug_write() function where a buffer allocated by memdup_user_nul() was not freed if kstrtoint() failed, leading to a resource leak. The fix involved changing the code to use automatic freeing mechanisms to prevent the leak. This vulnerability is classified as CWE-401 (Improper Release of Memory).
AI Analysis
Technical Summary
The Linux kernel's MediaTek SVS driver contained a memory leak in the svs_enable_debug_write() function. Specifically, when kstrtoint() failed, the buffer allocated by memdup_user_nul() was not freed, causing a memory leak. The patch replaced explicit kfree() calls with __free(kfree) to automate buffer cleanup and prevent leaks. This vulnerability does not affect confidentiality or integrity but impacts availability due to resource exhaustion potential. No known exploits are reported in the wild.
Potential Impact
The vulnerability causes a memory leak in the kernel driver, which can degrade system availability over time due to resource exhaustion. There is no impact on confidentiality or integrity. The CVSS vector indicates local attack complexity and privileges are required, with no user interaction needed. The severity is moderate.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The description indicates a fix has been implemented in the Linux kernel source code by modifying the svs_enable_debug_write() function to properly free memory. Users should monitor official Linux kernel releases and apply updates when available to remediate this issue.
A memory leak vulnerability was identified and fixed in the Linux kernel's MediaTek SVS driver. (CVE-2026-45881)
Description
A memory leak vulnerability was identified and fixed in the Linux kernel's MediaTek SVS driver. The issue occurred in the svs_enable_debug_write() function where a buffer allocated by memdup_user_nul() was not freed if kstrtoint() failed, leading to a resource leak. The fix involved changing the code to use automatic freeing mechanisms to prevent the leak. This vulnerability is classified as CWE-401 (Improper Release of Memory).
CVSS v3.1
Score 5.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel's MediaTek SVS driver contained a memory leak in the svs_enable_debug_write() function. Specifically, when kstrtoint() failed, the buffer allocated by memdup_user_nul() was not freed, causing a memory leak. The patch replaced explicit kfree() calls with __free(kfree) to automate buffer cleanup and prevent leaks. This vulnerability does not affect confidentiality or integrity but impacts availability due to resource exhaustion potential. No known exploits are reported in the wild.
Potential Impact
The vulnerability causes a memory leak in the kernel driver, which can degrade system availability over time due to resource exhaustion. There is no impact on confidentiality or integrity. The CVSS vector indicates local attack complexity and privileges are required, with no user interaction needed. The severity is moderate.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The description indicates a fix has been implemented in the Linux kernel source code by modifying the svs_enable_debug_write() function to properly free memory. Users should monitor official Linux kernel releases and apply updates when available to remediate this issue.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-863v-gcwh-wp4v
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-45881"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a3ef7f027e9c79719035c5b
Added to database: 06/26/2026, 22:06:40 UTC
Last enriched: 06/26/2026, 22:50:44 UTC
Last updated: 07/31/2026, 19:24:50 UTC
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.