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Vulnerabilities

Vulnerability · CVE-2023-53802

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_ht

Published Dec 9, 2025 · catalog updated May 11, 2026 · Linux Linux

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2023-53802. EPSS is 0.19%. Act only if a listed version of Linux Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
None0.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.19%
Remediation
Version ranges on file
Affected products
vendor Linux Linux fb9987d0f748c983bb795a86f47522313f701a08 <9b25e3985477ac3f02eca5fc1e0cc6850a3f7e69

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux Linux fb9987d0f748c983bb795a86f47522313f701a08 <9b25e3985477ac3f02eca5fc1e0cc6850a3f7e69fb9987d0f748c983bb795a86f47522313f701a08 <9b25e3985477ac3f02eca5fc1e0cc6850a3f7e69

How to fix CVE-2023-53802

  • Upgrade

    CVE-2023-53802 lists a fix boundary at 9b25e3985477ac3f02eca5fc1e0cc6850a3f7e69. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in fb9987d0f748c983bb795a86f47522313f701a08 <9b25e3985477ac3f02eca5fc1e0cc6850a3f7e69

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2023-53802. EPSS is 0.19%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux fb9987d0f748c983bb795a86f47522313f701a08 <9b25e3985477ac3f02eca5fc1e0cc6850a3f7e69 fb9987d0f748c983bb795a86f47522313f701a08 <9b25e3985477ac3f02eca5fc1e0cc6850a3f7e69. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.19%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 9, 2025 · EUVD

    Detected

    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.

  2. May 11, 2026 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2023-53802

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-53802

    30-day exploitation probability 0.19%

    first.org
  • EUVDVulnerability recordEUVD-2023-60104

    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. Howe

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 26, 2026
  • EUVDOct 26, 2026