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NVD / CVE Program· CNA Linux

CVE-2026-74650: staging: rtl8723bs: fix OOB read in WMM_param_handler()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 1158b9931207392d6dd136aa0c4be18893b50fa1, 2bee6f7a0f0125238951e31da2e96d06fe359043, 5df2fd06567df5f178c8faae0bdaefd203618d21.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 1158b9931207392d6dd136aa0c4be18893b50fa1, 2bee6f7a0f0125238951e31da2e96d06fe359043, 5df2fd06567df5f178c8faae0bdaefd203618d21 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in WMM_param_handler() WMM_param_handler() copies a fixed-size WMM parameter element out of a received information element without checking that the element is long enough, causing an out-of-bounds read for a short WMM IE. The handler reads sizeof(struct WMM_para_element) (18) bytes at pIE->data + 6, so it requires pIE->length to be at least 24 (WLAN_WMM_LEN), but it never validates the length. Two of its three callers reach it after matching only the WMM OUI: OnAssocRsp() in rtw_mlme_ext.c matches a 6-byte OUI, and join_cmd_hdl() matches a 4-byte OUI, before calling the handler. A vendor-specific IE carrying the WMM OUI but a length between 6 and 23, placed in an association response or in the IE blob handed to join_cmd_hdl(), passes the OUI check and then makes the memcmp() and memcpy() at pIE->data + 6 read past the end of the element. OnAssocRsp() parses a frame received from the AP, so this is reachable from a remote peer. The remaining caller in rtw_wlan_util.c already guards the handler with "pIE->length == WLAN_WMM_LEN". Move the equivalent check into the handler itself so every caller is covered; the sibling IE handlers in the same parsing loop (HT_caps_handler(), HT_info_handler(), ERP_IE_handler()) likewise bound their accesses by pIE->length.

—No exploit Fix available
Published
Aug 22, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.12affected
    • 554c0a3abf216c991c5ebddcdb2c08689ecd290b and later · before 5df2fd06567df5f178c8faae0bdaefd203618d21affected · git
    • 554c0a3abf216c991c5ebddcdb2c08689ecd290b and later · before 6cdca4c8b64c15a3ab9ad7a85f482e9519eadf93affected · git
    • 554c0a3abf216c991c5ebddcdb2c08689ecd290b and later · before 2bee6f7a0f0125238951e31da2e96d06fe359043affected · git
    • 554c0a3abf216c991c5ebddcdb2c08689ecd290b and later · before 1158b9931207392d6dd136aa0c4be18893b50fa1affected · git
    • 554c0a3abf216c991c5ebddcdb2c08689ecd290b and later · before ce2399717de242344880044b91a20a712644fdfbaffected · git
    • 554c0a3abf216c991c5ebddcdb2c08689ecd290b and later · before e5b7610008f4e6a80c8b071aa77ddbd5e17ea472affected · git
    • 554c0a3abf216c991c5ebddcdb2c08689ecd290b and later · before e429c6dfd5d2324cd866daaf4c29d5cfe4dea0e4affected · git
    • 554c0a3abf216c991c5ebddcdb2c08689ecd290b and later · before ae21407350151bddfd4fea7aa39bd0643c0ca9d3affected · git
    • before 4.12not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
Debian:14linuxbefore 7.1.9-17.1.9-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-74648Aug 22, 2026 · staging: rtl8723bs: validate monitor transmit frame lengths
    31Monitor
  • ← EarlierCVE-2026-74649Aug 22, 2026 · staging: rtl8723bs: fix missing shared-key auth challenge length check
    35Monitor
  • Later →CVE-2026-74651Aug 22, 2026 · staging: rtl8723bs: fix OOB read in rtw_get_wpa_ie()
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux1158b9931207392d6dd136aa0c4be18893b50fa1Vendor (CNA)
Linux Linux2bee6f7a0f0125238951e31da2e96d06fe359043Vendor (CNA)
Linux Linux5df2fd06567df5f178c8faae0bdaefd203618d21Vendor (CNA)
Linux Linux6cdca4c8b64c15a3ab9ad7a85f482e9519eadf93Vendor (CNA)
Linux Linuxae21407350151bddfd4fea7aa39bd0643c0ca9d3Vendor (CNA)
Linux Linuxce2399717de242344880044b91a20a712644fdfbVendor (CNA)
Linux Linuxe429c6dfd5d2324cd866daaf4c29d5cfe4dea0e4Vendor (CNA)
Linux Linuxe5b7610008f4e6a80c8b071aa77ddbd5e17ea472Vendor (CNA)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records