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: 1.3%CVSS: 8.8Exploit: None knownExposed services: Not assessed

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
8.8HIGHmedium confidence
EG Risk
45
EG Risk 45/100CISA 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
Severity88% × 45%
Exploitation1% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.3%
EPSS %ILE
69th
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

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

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

Vendor Advisories for CVE-2021-28660(1)

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

Patch Availability(4)

Vendor / EcosystemFix (by version range) / 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 rangeFix by version rangeDependents
linux4.9.107-1 ... 4.9.88-1~bpo8+1 (66 versions)
  • every version up to 4.9.272-1: fixed in 4.9.272-1
—
linux-4.194.19.132-1~deb9u1 ... 4.19.171-2~deb9u1 (6 versions)
  • every version up to 4.19.181-1~deb9u1: fixed in 4.19.181-1~deb9u1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.10.24-1: fixed in 5.10.24-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.10.24-1: fixed in 5.10.24-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.10.24-1: fixed in 5.10.24-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.10.24-1: fixed in 5.10.24-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(4)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 9× in last 7d / 33× 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 185 total refreshes for this CVE.

  1. 2026-10-05 17:40 UTCEPSS rescore
  2. 2026-10-04 23:19 UTCEPSS rescore
  3. 2026-10-03 14:22 UTCEPSS rescore
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  7. 2026-09-30 15:34 UTCEG score recompute
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  14. 2026-09-26 05:25 UTCOSV refresh
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  1. 2026-09-13 16:43 UTCEPSS rescore
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  6. 2026-09-07 15:58 UTCEPSS rescore
  7. 2026-09-06 20:13 UTCOSV refresh
  8. 2026-09-06 13:44 UTCEPSS rescore
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  26. 2026-08-20 06:34 UTCOSV refresh
  27. 2026-08-19 17:01 UTCEPSS rescore
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  41. 2026-08-05 19:14 UTCEPSS rescore
  42. 2026-08-05 01:41 UTCOSV refresh
  43. 2026-08-04 15:06 UTCEPSS rescore
  44. 2026-08-04 10:34 UTCEPSS rescore
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  57. 2026-07-23 14:16 UTCEPSS rescore
  58. 2026-07-23 01:59 UTCEG score recompute
  59. 2026-07-22 22:46 UTCEG score recompute
  60. 2026-07-22 14:06 UTCEPSS rescore
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  68. 2026-07-18 23:59 UTCOSV refresh
  69. 2026-07-18 10:02 UTCEPSS rescore
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  74. 2026-07-15 01:58 UTCEPSS rescore
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Related CVEs(same product + 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 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 1.3% probability of exploitation in the next 30 days (69th percentile of EPSS-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?
A fix for CVE-2021-28660 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2021-28660 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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