In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix warning when unbinding If there is an error during some… (CVE-2026-63822)
A double free vulnerability was identified and fixed in the Linux kernel's ath11k WiFi driver. The issue occurs when an error during firmware initialization causes certain buffers to be released twice, leading to a warning and potential instability. The fix involves setting the buffers to NULL after release to prevent the double free.
AI Analysis
Technical Summary
The Linux kernel's ath11k WiFi driver had a vulnerability where buffers dp->tx_ring[i].tx_status were freed twice if an error occurred during firmware-related initialization. This double free triggered warnings and could cause memory corruption or instability. The problem was reproducible in virtual machines due to MSI addressing initialization failures. The patch sets the buffers to NULL after freeing them to avoid the double free condition.
Potential Impact
The vulnerability can cause kernel warnings and potentially memory corruption or instability due to double freeing buffers in the ath11k WiFi driver. This could lead to system crashes or denial of service. There is no indication of remote code execution or privilege escalation from the provided data.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to address this issue by setting buffers to NULL after freeing them, preventing double free. Users should update to the fixed kernel version once available. Patch status is not explicitly confirmed in the provided data; check the vendor or Linux kernel advisories for the official patch and remediation guidance.
In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix warning when unbinding If there is an error during some… (CVE-2026-63822)
Description
A double free vulnerability was identified and fixed in the Linux kernel's ath11k WiFi driver. The issue occurs when an error during firmware initialization causes certain buffers to be released twice, leading to a warning and potential instability. The fix involves setting the buffers to NULL after release to prevent the double free.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel's ath11k WiFi driver had a vulnerability where buffers dp->tx_ring[i].tx_status were freed twice if an error occurred during firmware-related initialization. This double free triggered warnings and could cause memory corruption or instability. The problem was reproducible in virtual machines due to MSI addressing initialization failures. The patch sets the buffers to NULL after freeing them to avoid the double free condition.
Potential Impact
The vulnerability can cause kernel warnings and potentially memory corruption or instability due to double freeing buffers in the ath11k WiFi driver. This could lead to system crashes or denial of service. There is no indication of remote code execution or privilege escalation from the provided data.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to address this issue by setting buffers to NULL after freeing them, preventing double free. Users should update to the fixed kernel version once available. Patch status is not explicitly confirmed in the provided data; check the vendor or Linux kernel advisories for the official patch and remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-783h-g799-4r2q
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-63822"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5d27ad2a4a8d5989131285
Added to database: 07/19/2026, 19:38:21 UTC
Last enriched: 07/19/2026, 20:18:41 UTC
Last updated: 07/20/2026, 17:26:47 UTC
Views: 12
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