CVE-2026-64445 — staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth()
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth() OnAuth() has two bugs in the shared-key authentication path. When the Privacy bit is set, rtw_wep_decrypt() is called without verifying that the frame is long enough to contain a valid WEP IV and ICV. Inside rtw_wep_decrypt(), length is computed as: length = len - WLAN_HDR_A3_LEN - iv_len and then passed as (length - 4) to crc32_le(). If len is less than WLAN_HDR_A3_LEN + iv_len + icv_len (32 bytes), length - 4 is negative and, after the implicit cast to size_t, causes crc32_le() to read far beyond the frame buffer. Add a minimum length check before accessing the IV field and calling the decryption path. When processing a seq=3 response, rtw_get_ie() stores the Challenge Text IE length in ie_len, but the subsequent memcmp() always reads 128 bytes regardless of ie_len. IEEE 802.11 mandates a challenge text of exactly 128 bytes; reject any IE whose length field differs, matching the check already applied to OnAuthClient().
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- EPSS 0.3% (30-day exploitation probability)+3
- Technical severity (high)+6
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Linux Linux, Linux Linux Kernel).
- Apply the fixed version or the patch documented under Remediation.
- Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Linux | Linux |
≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b and < 665e1ecb68b4e8419604e70a33f02d1c8b0222c6version 4.12≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b and < a1fc19d61f661d47204f095b593de507884849f7≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b and < d90b9f39f375c9826ef145605dfe97765d0ecb91≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b and < 64ec4192d9c10e96922245d4a6747304cc76b19d≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b and < 3e44a7665f3abd320a80d9c64ee4a93317041b8b≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b and < 1f6c9d255bdda41216b6e34c96aa2b1abee0bb84≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b and < c9000c93078e5c0a5a651b077c0ec92a4bc7d580 and 1 more≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b and < 87cccc2a767f17dcab71e3b9fe5ae29b5516c5ce |
Vulnerable | CVE Program (cve.org) e CISA ADP |
| Linux | Linux Kernel |
≥ 4.12 and < 5.10.261version 7.2-rc2version 7.2-rc1≥ 6.19 and < 7.1.4≥ 6.13 and < 6.18.39≥ 6.7 and < 6.12.96≥ 6.2 and < 6.6.145≥ 5.16 and < 6.1.178 and 1 more≥ 5.11 and < 5.15.212 |
Vulnerable | NIST National Vulnerability Database |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 8.8 | CVSS 3.1 | High | 2.8 | 5.9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database |
| 8.8 | CVSS 3.1 | High | — | — | Linux via CVE Program (cve.org) e CISA ADP |
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (score shown at the top: 416baaa9-dc9f-4396-8d5f-8c081fb06d67) Weakness MITRE
Weakness class according to MITRE’s CWE catalog.
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.
Timeline
What happened to this CVE, newest first.
- 2026
- Affected products added · linux/linux
- Record published
- Fix documented
- CVSS changed · 8.8
- Source status changed · → Analyzed
- Record created in this database
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 1× Official description updated · Oct 15, 2026 – Oct 15, 2026
References
8 on the record
- git.kernel.org/stable/c/3e44a7665f3abd320a80d9c64ee4a93317041b8b
- git.kernel.org/stable/c/c9000c93078e5c0a5a651b077c0ec92a4bc7d580
- git.kernel.org/stable/c/a1fc19d61f661d47204f095b593de507884849f7
- git.kernel.org/stable/c/64ec4192d9c10e96922245d4a6747304cc76b19d
- git.kernel.org/stable/c/87cccc2a767f17dcab71e3b9fe5ae29b5516c5ce
- git.kernel.org/stable/c/d90b9f39f375c9826ef145605dfe97765d0ecb91
- git.kernel.org/stable/c/1f6c9d255bdda41216b6e34c96aa2b1abee0bb84
- git.kernel.org/stable/c/665e1ecb68b4e8419604e70a33f02d1c8b0222c6
Elsewhere on this site
Related CVEs (same products)
- Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 19h
- Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 19h
- Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
- Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
- Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d
- Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 1d
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No CISA SSVC assessment.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2026-64445 is "staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth()", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.8 describes technical severity. EPSS 0.32% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
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