CVE-2023-53321
CVE-2023-53321 is a high-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 3.x base score 7.1)
- EPSS exploit prediction: 0% (4th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2023-59940
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: drop short frames While technically some control frames like ACK are shorter and end after Address 1, such frames shouldn't be forwarded through wmediumd or similar userspace, so require the full 3-address header to avoid accessing invalid memory if shorter frames are passed in.
Frequently asked questions
- What is CVE-2023-53321?
- In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: drop short frames While technically some control frames like ACK are shorter and end after Address 1, such frames shouldn't be forwarded through wmediumd or similar userspace, so require the full 3-address header to avoid accessing invalid memory if shorter frames are passed in.
- How severe is CVE-2023-53321?
- CVE-2023-53321 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
- Is CVE-2023-53321 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-53321?
- CVE-2023-53321 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2023-53321?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2023-53321 have an EU (EUVD) identifier?
- Yes. CVE-2023-53321 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-59940.
- When was CVE-2023-53321 published?
- CVE-2023-53321 was published on 2025-09-16 and last updated on 2026-06-17.
References
- https://git.kernel.org/stable/c/3beb97bed860d95b14ad23578ce8ddaea62023db
- https://git.kernel.org/stable/c/672205c6f2d11978fcd7f0f336bb2c708e28874b
- https://git.kernel.org/stable/c/89a41ed7f21476301659ebd25ccb48a60791c1a7
- https://git.kernel.org/stable/c/b9a175e3b250b0dc6e152988040aa5014e98e61e
- https://git.kernel.org/stable/c/c64ee9dd335832d5e2ab0a8fc83a34ad4c729799
- https://git.kernel.org/stable/c/fba360a047d5eeeb9d4b7c3a9b1c8308980ce9a6
Affected products (1)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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