CVE-2026-64446staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Aug 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before a94a643a80a84ceb8139061c3d6bf988d75e45a5; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 2131621986c62c86109ce4d84cf73a73757eb8a6; 554c0a3abf216c991c5ebddcdb2c08689ecd290b builds before 6f20d7b0ee47c470734a69379b0fc6647c519603; 554c0a3abf216c991c5ebddcdb2c08689ecd290b builds before 5d7812360abf3143afcbf5efe4ef242448fa1f28; 554c0a3abf216c991c5ebddcdb2c08689ecd290b builds before 46f66c16a95191d9aca07a72ae6b1252a244e26c; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before b9c4bf133c3c47e23baf4f5403b98a953bf58606; 554c0a3abf216c991c5ebddcdb2c08689ecd290b builds before 138cd190efd56ab36c9fdd8fef8749d06937f24b; 554c0a3abf216c991c5ebddcdb2c08689ecd290b builds before 5a752a616e756844388a1a45404db9fc29fec655 | CNA record |
linux linux_kernel linux:linux_kernel | from 4.12 before 5.10.261; from 5.11 before 5.15.212; from 5.16 before 6.1.178; from 6.2 before 6.6.145; from 6.7 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4; 7.2; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/a94a643a80a84ceb8139061c3d6bf988d75e45a5patch
- https://git.kernel.org/stable/c/2131621986c62c86109ce4d84cf73a73757eb8a6patch
- https://git.kernel.org/stable/c/6f20d7b0ee47c470734a69379b0fc6647c519603patch
- https://git.kernel.org/stable/c/5d7812360abf3143afcbf5efe4ef242448fa1f28patch
- https://git.kernel.org/stable/c/46f66c16a95191d9aca07a72ae6b1252a244e26cpatch
- https://git.kernel.org/stable/c/b9c4bf133c3c47e23baf4f5403b98a953bf58606patch
- https://git.kernel.org/stable/c/138cd190efd56ab36c9fdd8fef8749d06937f24bpatch
- https://git.kernel.org/stable/c/5a752a616e756844388a1a45404db9fc29fec655patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.