CVE-2026-64446: Linux kernel · staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in b9c4bf133c3c47e23baf4f5403b98a953bf58606 : patch Linux kernel soon.
Data as of 6 Nov 2026, 18:36 UTC
Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in b9c4bf133c3c47e23baf4f5403b98a953bf58606, a94a643a80a84ceb8139061c3d6bf988d75e45a5, 2131621986c62c86109ce4d84cf73a73757eb8a6 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
A fix is available and has been committed in multiple Linux kernel versions as indicated by the fixed commit hashes. Users should update their Linux kernel to a version including these fixes. No additional mitigation is required beyond applying the official patch.
Description
A heap buffer overflow vulnerability exists in the Linux kernel's rtl8723bs staging driver in the function rtw_cfg80211_set_wpa_ie(). The flaw arises when a crafted WPA IE of length 255 is supplied, causing a memcpy operation to overflow a 256-byte buffer by one byte. This overflow can corrupt adjacent memory. The issue is fixed by adding explicit bounds checks to reject oversized WPA IE inputs.
References
- git.kernel.org/stable/c/a94a643a80a84ceb8139061c3d6bf988d75e45a5 (opens in a new tab)
- git.kernel.org/stable/c/2131621986c62c86109ce4d84cf73a73757eb8a6 (opens in a new tab)
- git.kernel.org/stable/c/6f20d7b0ee47c470734a69379b0fc6647c519603 (opens in a new tab)
- git.kernel.org/stable/c/5d7812360abf3143afcbf5efe4ef242448fa1f28 (opens in a new tab)
- git.kernel.org/stable/c/46f66c16a95191d9aca07a72ae6b1252a244e26c (opens in a new tab)
- git.kernel.org/stable/c/b9c4bf133c3c47e23baf4f5403b98a953bf58606 (opens in a new tab)
- git.kernel.org/stable/c/138cd190efd56ab36c9fdd8fef8749d06937f24b (opens in a new tab)
- git.kernel.org/stable/c/5a752a616e756844388a1a45404db9fc29fec655 (opens in a new tab)