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CVE-2026-63822

UnknownEPSS 0.17%

Last modified

CVE-2026-63822 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix warning when unbinding If there is an error during some initialization related to firmware, the buffers dp->tx_ring[i].tx_status are released. However this is released again when the device is unbinded (ath11k_pci), and we get: WARNING: CPU: 0 PID: 6231 at mm/slub.c:4368 free_large_kmalloc+0x57/0x90 Call Trace: free_large_kmalloc ath11k_dp_free ath11k_core_deinit ath11k_pci_remove ... The issue is always reproducible from a VM because the MSI addressing initialization is failing. In order to fix the issue, just set the buffers to NULL after releasing in order to avoid the double free.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix warning when unbinding If there is an error during some initialization related to firmware, the buffers dp->tx_ring[i].tx_status are released. However this is released again when the device is unbinded (ath11k_pci), and we get: WARNING: CPU: 0 PID: 6231 at mm/slub.c:4368 free_large_kmalloc+0x57/0x90 Call Trace: free_large_kmalloc ath11k_dp_free ath11k_core_deinit ath11k_pci_remove ... The issue is always reproducible from a VM because the MSI addressing initialization is failing. In order to fix the issue, just set the buffers to NULL after releasing in order to avoid the double free.

Metrics

EPSS Probability
0.17%

7.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= d5c65159f2895379e11ca13f62feabe93278985d, < e569a5cb401a267168621aa9a1e7f07fcc9612c3; >= d5c65159f2895379e11ca13f62feabe93278985d, < 0aa097a370277deab5337030b9e2d395742f469c; >= d5c65159f2895379e11ca13f62feabe93278985d, < 0a946abb82f29abe9a15173b707a449cb039b43e; >= d5c65159f2895379e11ca13f62feabe93278985d, < 318703b6f71d1a29ee0ac46c32a38f7734d4cfb2; >= d5c65159f2895379e11ca13f62feabe93278985d, < 7b2e62b9080bf4a5f4e70cfe47156df8d93a4f13; >= d5c65159f2895379e11ca13f62feabe93278985d, < 40aa3c2b0cb8e34e0576fc94cc70e4e33db03c0a; >= d5c65159f2895379e11ca13f62feabe93278985d, < 051f954b94479d72222c9fbc82a3eef4777bca01; >= d5c65159f2895379e11ca13f62feabe93278985d, < 8b7a26b6681922a38cd5a7829ace61f8e54df9b7
LinuxLinux5.6

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-63822?
In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix warning when unbinding If there is an error during some initialization related to firmware, the buffers dp->tx_ring[i].tx_status are released. However this is released again when the device is unbinded (ath11k_pci), and we get: WARNING: CPU: 0 PID: 6231 at mm/slub.c:4368 free_large_kmalloc+0x57/0x90 Call Trace: free_large_kmalloc ath11k_dp_free ath11k_core_deinit ath11k_pci_remove ... The issue is always reproducible from a VM because the MSI addressing initialization is failing. In order to fix the issue, just set the buffers to NULL after releasing in order to avoid the double free.
How severe is CVE-2026-63822?
Severity scoring for CVE-2026-63822 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-63822?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST