CVE-2026-64446staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()
- 7.8HighCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 96% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie() supplicant_ie is a 256-byte array in struct security_priv. The WPA and WPA2 IE copy paths use: memcpy(padapter->securitypriv.supplicant_ie, &pwpa[0], wpa_ielen + 2); where wpa_ielen is the raw IE length field (u8, 0-255). When a local user supplies a connect request via nl80211 with a crafted WPA IE of length 255, wpa_ielen + 2 equals 257, overflowing the 256-byte buffer by one byte into the adjacent last_mic_err_time field. rtw_parse_wpa_ie() does not prevent this: its length consistency check compares *(wpa_ie+1) against (u8)(wpa_ie_len-2), which is (u8)(255) == 255 when wpa_ie_len = 257, so the check passes silently. Add explicit bounds checks for both the WPA and WPA2 paths before the memcpy, rejecting any IE whose total size (wpa_ielen + 2) exceeds the supplicant_ie buffer.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 96% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < a94a643a80a84ceb8139061c3d6bf988d75e45a5
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < 2131621986c62c86109ce4d84cf73a73757eb8a6
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < 6f20d7b0ee47c470734a69379b0fc6647c519603
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < 5d7812360abf3143afcbf5efe4ef242448fa1f28
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < 46f66c16a95191d9aca07a72ae6b1252a244e26c
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < b9c4bf133c3c47e23baf4f5403b98a953bf58606
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < 138cd190efd56ab36c9fdd8fef8749d06937f24b
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < 5a752a616e756844388a1a45404db9fc29fec655
- affected 4.12
- unaffected < 4.12
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/a94a643a80a84ceb8139061c3d6bf988d75e45a5 (opens in a new tab)
- https://git.kernel.org/stable/c/2131621986c62c86109ce4d84cf73a73757eb8a6 (opens in a new tab)
- https://git.kernel.org/stable/c/6f20d7b0ee47c470734a69379b0fc6647c519603 (opens in a new tab)
- https://git.kernel.org/stable/c/5d7812360abf3143afcbf5efe4ef242448fa1f28 (opens in a new tab)
- https://git.kernel.org/stable/c/46f66c16a95191d9aca07a72ae6b1252a244e26c (opens in a new tab)
- https://git.kernel.org/stable/c/b9c4bf133c3c47e23baf4f5403b98a953bf58606 (opens in a new tab)
- https://git.kernel.org/stable/c/138cd190efd56ab36c9fdd8fef8749d06937f24b (opens in a new tab)
- https://git.kernel.org/stable/c/5a752a616e756844388a1a45404db9fc29fec655 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-48790 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64446)Record last updated .