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CVE-2023-53802— wifi: ath9k: htc_hst: free skb in ath9k_htc_rx_msg() if there is no callback function

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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ath9k_htc_rx_msg未在没有回调函数时释放skb，可能导致内存泄漏。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.19% · P9

Possible ATT&CK Techniques 1 AI

T1076

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux fb9987d0f748c983bb795a86f47522313f701a08< b11f95f65cc52ee3a756e6f6a88df37a203e25bd affected
fb9987d0f748c983bb795a86f47522313f701a08< 68171c006c8645a3e0293a6c3e6037c6538ac1c5 affected
fb9987d0f748c983bb795a86f47522313f701a08< 564bc2222bf50eb6cdee715a5431bf4dc9f923c1 affected
fb9987d0f748c983bb795a86f47522313f701a08< ec246dfe006b2a8f36353f7489e4f525114db9a5 affected
fb9987d0f748c983bb795a86f47522313f701a08< c0c0614f143b568cd0e9525d53cf12e5dcd11987 affected
fb9987d0f748c983bb795a86f47522313f701a08< 5a84e51f72580fc70066b03f3dac38421e702a0b affected
fb9987d0f748c983bb795a86f47522313f701a08< bbfababb4f899fe1556eac195f9774b6fe675fb6 affected
fb9987d0f748c983bb795a86f47522313f701a08< 9b25e3985477ac3f02eca5fc1e0cc6850a3f7e69 affected
… +10 more rows
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I. Basic Information for CVE-2023-53802

Vulnerability Information
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Vulnerability Title
wifi: ath9k: htc_hst: free skb in ath9k_htc_rx_msg() if there is no callback function
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: htc_hst: free skb in ath9k_htc_rx_msg() if there is no callback function It is stated that ath9k_htc_rx_msg() either frees the provided skb or passes its management to another callback function. However, the skb is not freed in case there is no another callback function, and Syzkaller was able to cause a memory leak. Also minor comment fix. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ath9k_htc_rx_msg未在没有回调函数时释放skb，可能导致内存泄漏。
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 fb9987d0f748c983bb795a86f47522313f701a08 ~ b11f95f65cc52ee3a756e6f6a88df37a203e25bd -
Linux Linux 2.6.35 -

II. Public POCs for CVE-2023-53802

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III. Intelligence Information for CVE-2023-53802

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Same Patch Batch · Linux · 2025-12-09 · 152 CVEs total

CVE-2022-50666 9.8 CRITICAL RDMA/siw: Fix QP destroy to wait for all references dropped.
CVE-2025-40343 9.8 CRITICAL nvmet-fc: avoid scheduling association deletion twice
CVE-2023-53794 9.8 CRITICAL cifs: fix session state check in reconnect to avoid use-after-free issue
CVE-2025-40342 8.8 HIGH nvme-fc: use lock accessing port_state and rport state
CVE-2023-53822 8.8 HIGH wifi: ath11k: Ignore frags from uninitialized peer in dp.
CVE-2023-53785 8.8 HIGH mt76: mt7921: don't assume adequate headroom for SDIO headers
CVE-2025-40336 8.8 HIGH drm/gpusvm: fix hmm_pfn_to_map_order() usage
CVE-2023-53827 8.8 HIGH Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp}
CVE-2025-40328 8.8 HIGH smb: client: fix potential UAF in smb2_close_cached_fid()
CVE-2023-53851 8.4 HIGH drm/msm/dp: Drop aux devices together with DP controller
CVE-2025-40337 8.2 HIGH net: stmmac: Correctly handle Rx checksum offload errors
CVE-2022-50656 8.1 HIGH nfc: pn533: Clear nfc_target before being used
CVE-2023-53803 8.1 HIGH scsi: ses: Fix slab-out-of-bounds in ses_enclosure_data_process()
CVE-2023-53800 7.8 HIGH ubi: Fix use-after-free when volume resizing failed
CVE-2023-53860 7.8 HIGH dm: don't attempt to queue IO under RCU protection
CVE-2023-53829 7.8 HIGH f2fs: flush inode if atomic file is aborted
CVE-2023-53790 7.8 HIGH bpf: Zeroing allocated object from slab in bpf memory allocator
CVE-2023-53836 7.8 HIGH bpf, sockmap: Fix skb refcnt race after locking changes
CVE-2023-53844 7.8 HIGH drm/ttm: Don't leak a resource on swapout move error
CVE-2023-53846 7.8 HIGH f2fs: fix to do sanity check on direct node in truncate_dnode()

Showing top 20 of 152 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53802

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