CVE-2026-100076

MEDIUMNVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-09-25. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.5Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

In the Linux kernel, the following vulnerability has been resolved:

staging: rtl8723bs: fix xmit_frame/xmit_buf leaks on mgnt-frame error paths

issue_beacon(), issue_probersp() and issue_asocrsp() obtain a management xmit_frame together with its xmit_buf from the driver's fixed-size management-TX pools via alloc_mgtxmitframe(). On the normal path the frame is handed to dump_mgntframe(), which transfers ownership and eventually returns both objects to their pools (the frame and, for beacons, the buf in rtl8723bs_mgnt_xmit(); other bufs via the pending-xmitbuf/TX-completion path).

Several error/edge paths return early after a successful alloc_mgtxmitframe() but before dump_mgntframe(), so ownership is never transferred and neither object is freed:

  • issue_beacon(): beacon larger than 512 bytes
  • issue_probersp(): cur_network->ie_length > MAX_IE_SZ
  • issue_probersp(): kzalloc() of the SSID scratch buffer fails
  • issue_asocrsp(): pkt_type is neither ASSOCRSP nor REASSOCRSP

Because alloc_mgtxmitframe() removes the frame and buf from their free lists (list_del_init) without placing them on any pending list, an orphaned pair is on no list and referenced by nobody, so it is only reclaimed at driver teardown. Repeated hits progressively exhaust the management-TX pools until alloc_mgtxmitframe() returns NULL and the interface can no longer send beacons or probe/assoc responses.

Free the frame and buffer on these paths, matching the existing correct error handling in issue_assocreq().

CVSS v3
5.5
EG Score
5.5MEDIUMhigh confidence
EG Risk
29
EG Risk 29/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 25, 2026

Last Modified

October 2, 2026

Advisory Details (3)

Auto-updated Oct 2, 2026
No patch confirmed yet.
generic

staging: rtl8723bs: fix xmit_frame/xmit_buf leaks on mgnt-frame error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c48e5aa01525577d6b6e782962a5bfb0e1535cb5
generic

staging: rtl8723bs: fix xmit_frame/xmit_buf leaks on mgnt-frame error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6c9f6a3b9fdd31a0836b681053155b5997c0156e
generic

staging: rtl8723bs: fix xmit_frame/xmit_buf leaks on mgnt-frame error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/41b8209376dffbd7b0b85c8bc4697d9166ac62ef

Vendor Advisories for CVE-2026-100076(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (358 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (181 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (178 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 10:24 UTCEG score recompute
  2. 2026-10-05 10:23 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 11:58 UTCEG score recompute
  5. 2026-10-04 11:58 UTCGHSA enrichment
  6. 2026-10-03 14:25 UTCEPSS rescore
  7. 2026-10-03 13:32 UTCEG score recompute
  8. 2026-10-03 13:32 UTCGHSA enrichment
  9. 2026-10-02 15:05 UTCEG score recompute▲ 5.50
  10. 2026-10-02 15:05 UTCGHSA enrichment
  11. 2026-10-02 15:05 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  12. 2026-10-01 19:49 UTCEPSS rescore
  13. 2026-09-30 15:02 UTCEPSS rescore
  14. 2026-09-30 14:32 UTCEG score recompute
  15. 2026-09-30 14:32 UTCGHSA enrichment
  16. 2026-09-29 15:20 UTCEPSS rescore
  17. 2026-09-28 13:50 UTCEPSS rescore
  18. 2026-09-28 13:08 UTCEG score recompute
  19. 2026-09-28 13:08 UTCGHSA enrichment
  20. 2026-09-26 15:58 UTCEPSS rescore
  21. 2026-09-25 14:20 UTCNVD update
  22. 2026-09-25 13:19 UTCEG score recompute
  23. 2026-09-25 13:19 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-100076?
CVE-2026-100076 is a medium vulnerability published on September 25, 2026. In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix xmitframe/xmitbuf leaks on mgnt-frame error paths issuebeacon(), issueprobersp() and issue_asocrsp() obtain a management xmitframe together with its xmitbuf from the driver's fixed-size management-TX pools…
When was CVE-2026-100076 disclosed?
CVE-2026-100076 was first published on September 25, 2026, with the most recent update on October 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-100076 actively exploited?
CVE-2026-100076 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100076?
CVE-2026-100076 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-100076?
No fix for CVE-2026-100076 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-100076 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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