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CVE-2023-53802

11
FAUCET Score

CVE-2023-53802 is a memory leak vulnerability in the Linux kernel's ath9k Wi-Fi driver, specifically within the ath9k_htc_rx_msg() function, affecting systems utilizing this driver. The vulnerability arises because the skb (socket buffer) is not properly freed when no callback function is present to manage it, leading to resource exhaustion. While no CVSS score is provided, its FAUCET Risk Score is low at 7/100, and its EPSS score is extremely low, suggesting minimal exploitability or impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
LinuxLinux
2.6.35CNA affecteddefault affected
LinuxLinux
>= fb9987d0f748c983bb795a86f47522313f701a08, < 564bc2222bf50eb6cdee715a5431bf4dc9f923c1, >= fb9987d0f748c983bb795a86f47522313f701a08, < 5a84e51f72580fc70066b03f3dac38421e702a0b, >= fb9987d0f748c983bb795a86f47522313f701a08, < 68171c006c8645a3e0293a6c3e6037c6538ac1c5, >= fb9987d0f748c983bb795a86f47522313f701a08, < 9b25e3985477ac3f02eca5fc1e0cc6850a3f7e69, >= fb9987d0f748c983bb795a86f47522313f701a08, < b11f95f65cc52ee3a756e6f6a88df37a203e25bd, >= fb9987d0f748c983bb795a86f47522313f701a08, < bbfababb4f899fe1556eac195f9774b6fe675fb6, >= fb9987d0f748c983bb795a86f47522313f701a08, < c0c0614f143b568cd0e9525d53cf12e5dcd11987, >= fb9987d0f748c983bb795a86f47522313f701a08, < ec246dfe006b2a8f36353f7489e4f525114db9a5CNA affecteddefault unaffected

CVSS Data

CVSS data has not been published for this CVE.

Exploit Intelligence

EPSS Score
0.17%
Probability of exploitation in next 30 days
EPSS Percentile
6.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15

Social Chatter

Media Mentions

No media coverage found for this CVE.

Remediation

Vendor Patches (1)

redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2023-53802Moderate

kernel: wifi: ath9k: htc_hst: free skb in ath9k_htc_rx_msg() if there is no callback function

Dec 9, 2025

References

git.kernel.org / stable/c/564bc2222bf50eb6cdee715a5431bf4dc9f923c1
git.kernel.org / stable/c/5a84e51f72580fc70066b03f3dac38421e702a0b
git.kernel.org / stable/c/68171c006c8645a3e0293a6c3e6037c6538ac1c5
git.kernel.org / stable/c/9b25e3985477ac3f02eca5fc1e0cc6850a3f7e69
git.kernel.org / stable/c/b11f95f65cc52ee3a756e6f6a88df37a203e25bd
git.kernel.org / stable/c/bbfababb4f899fe1556eac195f9774b6fe675fb6
git.kernel.org / stable/c/c0c0614f143b568cd0e9525d53cf12e5dcd11987
git.kernel.org / stable/c/ec246dfe006b2a8f36353f7489e4f525114db9a5