CVE-2021-28660

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

rtw_wx_set_scan in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c in the Linux kernel through 5.11.6 allows writing beyond the end of the ->ssid[] array. NOTE: from the perspective of kernel.org releases, CVE IDs are not normally used for drivers/staging/* (unfinished work); however, system integrators may have situations in which a drivers/staging issue is relevant to their own customer base.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

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
Severity88% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
69%
KEV
Not listed

Published

March 17, 2021

Last Modified

November 21, 2024

Advisory Details (7)

Auto-updated Aug 21, 2026
Patch available.
generic

staging: rtl8188eu: prevent ->ssid overflow in rtw_wx_set_scan() - kernel/git/torvalds/linux.git - Linux kernel source tree

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=74b6b20df8cfe90ada777d621b54c32e69e27cd7
generic

oss-security - Re: Linux kernel: staging: rtl8712: A Use-after-Free/Double-Free bug in read_bbreg_hdl in drivers/staging/rtl8712/rtl8712_cmd.c

http://www.openwall.com/lists/oss-security/2022/11/21/2
generic

oss-security - Linux kernel: staging: rtl8712: A Use-after-Free/Double-Free bug in read_bbreg_hdl in drivers/staging/rtl8712/rtl8712_cmd.c

http://www.openwall.com/lists/oss-security/2022/11/18/1
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20210507-0008/
generic

[SECURITY] Fedora 33 Update: kernel-tools-5.11.7-200.fc33 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TJPVQZPY3DHPV5I3IVNMSMO6D3PKZISX/
generic Patch Available

[SECURITY] [DLA 2689-1] linux security update

https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
generic Patch Available

[SECURITY] [DLA 2610-1] linux-4.19 security update

https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-virtual-hwe-18.04-edge (5.4.0.73.76) @ focal2026-05-26ubuntu
ubuntulinux-image-virtual-hwe-16.04-edge (4.15.0.144.140) @ xenial2026-05-26ubuntu
ubuntulinux-image-raspi-hwe-18.04-edge (5.4.0.1035.37) @ bionic2026-05-26ubuntu
ubuntulinux-image-virtual-hwe-20.04-edge (5.8.0.55.60) @ groovy2026-05-26ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 5 ecosystems)
Debian:9(2)
PackageVulnerable rangeFixed inDependents
linux4.9.107-1 ... 4.9.88-1~bpo8+1 (66 versions)4.9.272-1—
linux-4.194.19.132-1~deb9u1 ... 4.19.171-2~deb9u1 (6 versions)4.19.181-1~deb9u1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux—5.10.24-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—5.10.24-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—5.10.24-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—5.10.24-1—

Weakness Classification(1)

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

All Vendor Advisories

(5)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 37× 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.

Showing the most recent 100 of 136 total refreshes for this CVE.

  1. 2026-08-20 22:52 UTCEPSS rescore
  2. 2026-08-20 06:34 UTCOSV refresh
  3. 2026-08-19 17:01 UTCEPSS rescore
  4. 2026-08-18 13:45 UTCEPSS rescore
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  18. 2026-08-05 01:41 UTCOSV refresh
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  1. 2026-07-30 01:28 UTCEPSS rescore
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  8. 2026-07-23 14:16 UTCEPSS rescore
  9. 2026-07-23 01:59 UTCEG score recompute
  10. 2026-07-22 22:46 UTCEG score recompute
  11. 2026-07-22 14:06 UTCEPSS rescore
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  19. 2026-07-18 23:59 UTCOSV refresh
  20. 2026-07-18 10:02 UTCEPSS rescore
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  22. 2026-07-16 17:00 UTCEPSS rescore
  23. 2026-07-15 16:55 UTCEPSS rescore
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  25. 2026-07-15 01:58 UTCEPSS rescore
  26. 2026-07-13 22:27 UTCEPSS rescore
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  28. 2026-07-13 06:10 UTCEPSS rescore
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  31. 2026-07-11 08:25 UTCEPSS rescore
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  43. 2026-07-02 16:57 UTCEPSS rescore
  44. 2026-07-01 15:03 UTCEPSS rescore
  45. 2026-07-01 06:48 UTCOSV refresh
  46. 2026-06-30 23:20 UTCEPSS rescore
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  48. 2026-06-29 14:04 UTCEPSS rescore
  49. 2026-06-28 14:05 UTCEPSS rescore
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  68. 2026-06-18 17:51 UTCEPSS rescore
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  73. 2026-06-14 23:15 UTCEPSS rescore
  74. 2026-06-13 22:58 UTCEPSS rescore
  75. 2026-06-13 22:58 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2021-28660?
CVE-2021-28660 is a high vulnerability published on March 17, 2021. rtwwxsetscan in drivers/staging/rtl8188eu/osdep/ioctl_linux.c in the Linux kernel through 5.11.6 allows writing beyond the end of the ->ssid[] array. NOTE: from the perspective of kernel.org releases, CVE IDs are not normally used for drivers/staging/* (unfinished work); however, system integrators…
When was CVE-2021-28660 disclosed?
CVE-2021-28660 was first published in the National Vulnerability Database on March 17, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-28660 actively exploited?
CVE-2021-28660 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 31.5% of all scored CVEs.
What is the CVSS score of CVE-2021-28660?
CVE-2021-28660 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2021-28660?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-28660, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-28660

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