CVE-2026-64443: staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop

mediumCVSS 5.5CVE-2026-64443

CSIRTS triage

product: rtl8723bsOther

What: The vulnerability fixes an out-of-bounds read in the update_beacon_info() loop.
Who is affected: Deployments using rtl8723bs are affected.
Urgency: Remediation urgency is unclear due to unknown severity and no exploitation reported.
Action: Monitor for updates regarding this issue.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64443

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-644430.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64443	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

highCVE-2026-64443: In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OO…nvd

Recent advisories for staging

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-64536: In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OO…nvd · 2026-07-27
highCVE-2026-64449: In the Linux kernel, the following vulnerability has been resolved: staging: vme_user: bound s…nvd · 2026-07-25
highCVE-2026-64447: In the Linux kernel, the following vulnerability has been resolved: staging: media: ipu7: fix …nvd · 2026-07-25
unknownCVE-2026-64446: In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix he…nvd · 2026-07-25
highCVE-2026-64445: In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix WE…nvd · 2026-07-25
highCVE-2026-64444: In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OO…nvd · 2026-07-25