CVE-2025-37973
CVE-2025-37973 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. The underlying weakness is classified as CWE-125.
Key facts
- Severity: High (CVSS 3.x base score 7.1)
- EPSS exploit prediction: 0% (5th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-15854
- Weakness: CWE-125
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: fix out-of-bounds access during multi-link element defragmentation Currently during the multi-link element defragmentation process, the multi-link element length added to the total IEs length when calculating the length of remaining IEs after the multi-link element in cfg80211_defrag_mle(). This could lead to out-of-bounds access if the multi-link element or its corresponding fragment elements are the last elements in the IEs buffer. To address this issue, correctly calculate the remaining IEs length by deducting the multi-link element end offset from total IEs end offset.
Frequently asked questions
- What is CVE-2025-37973?
- In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: fix out-of-bounds access during multi-link element defragmentation Currently during the multi-link element defragmentation process, the multi-link element length added to the total IEs length when calculating the length of remaining IEs after the multi-link element in cfg80211_defrag_mle(). This could lead to out-of-bounds access if the multi-link element or its corresponding fragment elements are the last elements in the IEs buffer. To address this issue, correctly calculate the remaining IEs length by deducting the multi-link element end offset from total IEs end offset.
- How severe is CVE-2025-37973?
- CVE-2025-37973 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-2025-37973 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-37973?
- CVE-2025-37973 primarily affects Linux Linux Kernel. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2025-37973?
- 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-2025-37973 have an EU (EUVD) identifier?
- Yes. CVE-2025-37973 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-15854.
- When was CVE-2025-37973 published?
- CVE-2025-37973 was published on 2025-05-20 and last updated on 2026-06-17.
References
- https://git.kernel.org/stable/c/023c1f2f0609218103cbcb48e0104b144d4a16dc
- https://git.kernel.org/stable/c/73dde269a1a43e6b1aa92eba13ad2df58bfdd38e
- https://git.kernel.org/stable/c/9423f6da825172b8dc60d4688ed3d147291c3be9
- https://git.kernel.org/stable/c/e1c6d0c6199bd5f4cfc7a66ae7032b6e805f904d
Affected products (6)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:*
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