CVE-2026-43386
CVE-2026-43386 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% (3rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-28692
- Weakness: CWE-125
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
Description
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix potential out-of-bounds read in rtw_restruct_wmm_ie The current code checks 'i + 5 < in_len' at the end of the if statement. However, it accesses 'in_ie[i + 5]' before that check, which can lead to an out-of-bounds read. Move the length check to the beginning of the conditional to ensure the index is within bounds before accessing the array.
Frequently asked questions
- What is CVE-2026-43386?
- In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix potential out-of-bounds read in rtw_restruct_wmm_ie The current code checks 'i + 5 < in_len' at the end of the if statement. However, it accesses 'in_ie[i + 5]' before that check, which can lead to an out-of-bounds read. Move the length check to the beginning of the conditional to ensure the index is within bounds before accessing the array.
- How severe is CVE-2026-43386?
- CVE-2026-43386 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-2026-43386 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-43386?
- CVE-2026-43386 primarily affects Linux Linux Kernel. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-43386?
- 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-2026-43386 have an EU (EUVD) identifier?
- Yes. CVE-2026-43386 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28692.
- When was CVE-2026-43386 published?
- CVE-2026-43386 was published on 2026-05-08 and last updated on 2026-06-17.
References
- https://git.kernel.org/stable/c/12cc6e8f8d4245b7b5a408c6fc8ab1d098d67020
- https://git.kernel.org/stable/c/209644e25757c499e1c1f08c071ea0386d4448b6
- https://git.kernel.org/stable/c/4dd2d9cf563c54e09d5f7eacf95c5b8f538b513b
- https://git.kernel.org/stable/c/6ff2243d5e05a5239e39d4ba61d96b0ea3bf7259
- https://git.kernel.org/stable/c/768f25613a9fe6766d15a4a72979657adfc1c6d8
- https://git.kernel.org/stable/c/a75281626fc8fa6dc6c9cc314ee423e8bc45203b
- https://git.kernel.org/stable/c/d97fc1b29513010b60fde874c7f0ba816744e18c
- https://git.kernel.org/stable/c/e14a1148f02e8cf1ca380d57e4b95ca36c97f45d
Affected products (4)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
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