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CVE-2026-63822— wifi: ath11k: fix warning when unbinding

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 5.6版本存在安全漏洞，该漏洞源于dp->tx_ring[i].tx_status缓冲区在固件初始化出错时被释放，设备卸载时又被释放一次，导致双重释放。

AI Predicted 5.6 Difficulty: Moderate EPSS 0.17% · P7

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux d5c65159f2895379e11ca13f62feabe93278985d< e569a5cb401a267168621aa9a1e7f07fcc9612c3 affected
d5c65159f2895379e11ca13f62feabe93278985d< 0aa097a370277deab5337030b9e2d395742f469c affected
d5c65159f2895379e11ca13f62feabe93278985d< 0a946abb82f29abe9a15173b707a449cb039b43e affected
d5c65159f2895379e11ca13f62feabe93278985d< 318703b6f71d1a29ee0ac46c32a38f7734d4cfb2 affected
d5c65159f2895379e11ca13f62feabe93278985d< 7b2e62b9080bf4a5f4e70cfe47156df8d93a4f13 affected
d5c65159f2895379e11ca13f62feabe93278985d< 40aa3c2b0cb8e34e0576fc94cc70e4e33db03c0a affected
d5c65159f2895379e11ca13f62feabe93278985d< 051f954b94479d72222c9fbc82a3eef4777bca01 affected
d5c65159f2895379e11ca13f62feabe93278985d< 8b7a26b6681922a38cd5a7829ace61f8e54df9b7 affected
… +10 more rows
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I. Basic Information for CVE-2026-63822

Vulnerability Information
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Vulnerability Title
wifi: ath11k: fix warning when unbinding
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 5.6版本存在安全漏洞，该漏洞源于dp->tx_ring[i].tx_status缓冲区在固件初始化出错时被释放，设备卸载时又被释放一次，导致双重释放。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux d5c65159f2895379e11ca13f62feabe93278985d ~ e569a5cb401a267168621aa9a1e7f07fcc9612c3 -
Linux Linux 5.6 -

II. Public POCs for CVE-2026-63822

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III. Intelligence Information for CVE-2026-63822

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Patches & Fixes for CVE-2026-63822 (8)

Same Patch Batch · Linux · 2026-07-19 · 429 CVEs total

CVE-2026-63795 10.0 CRITICAL 9p: avoid putting oldfid in p9_client_walk() error path
CVE-2026-64046 9.8 CRITICAL net: tls: prevent chain-after-chain in plain text SG
CVE-2026-63984 9.8 CRITICAL ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress()
CVE-2026-63979 9.8 CRITICAL net/handshake: hand off the pinned file reference to accept_doit
CVE-2026-63800 9.8 CRITICAL pNFS: Fix use-after-free in pnfs_update_layout()
CVE-2026-64142 9.8 CRITICAL ksmbd: close durable scavenger races against m_fp_list lookups
CVE-2026-63978 9.8 CRITICAL net/handshake: Drain pending requests at net namespace exit
CVE-2026-64056 9.8 CRITICAL net: ethernet: cortina: Make RX SKB per-port
CVE-2026-63808 9.8 CRITICAL exfat: fix potential use-after-free in exfat_find_dir_entry()
CVE-2026-64055 9.8 CRITICAL net: ethernet: cortina: Carry over frag counter
CVE-2026-63922 9.8 CRITICAL ipv6: exthdrs: refresh nh after handling HAO option
CVE-2026-64033 9.8 CRITICAL RDMA/rtrs: Fix use-after-free in path file creation cleanup
CVE-2026-64113 9.8 CRITICAL ixgbevf: fix use-after-free in VEPA multicast source pruning
CVE-2026-63825 9.8 CRITICAL gcov: use atomic counter updates to fix concurrent access crashes
CVE-2026-64016 9.8 CRITICAL ksmbd: fix durable reconnect error path file lifetime
CVE-2026-64122 9.8 CRITICAL net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover
CVE-2026-64047 9.8 CRITICAL net: tls: fix off-by-one in sg_chain entry count for wrapped sk_msg ring
CVE-2026-64035 9.8 CRITICAL igc: set tx buffer type for SMD frames
CVE-2026-64025 9.8 CRITICAL bpf, skmsg: fix verdict sk_data_ready racing with ktls rx
CVE-2026-64150 9.8 CRITICAL netfilter: nft_inner: release local_lock before re-enabling softirqs

Showing top 20 of 429 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-63822

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