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ExploitedIn CISA KEVFix available

CVE-2021-39793

Exploitation confirmed. First attested on 2022-04-11 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2022-03-16
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In kbase_jd_user_buf_pin_pages of mali_kbase_mem.c, there is a possible out of bounds write due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-210470189References: N/A

Timeline

dates in UTC
  1. 2022-03-1615:15CVE publishedNVD
  2. 2022-04-11Added to the CISA KEV catalogCISA KEV
  3. 2022-04-11Listed as exploited by GCVEGCVE
  4. 2022-04-11Exploitation first reportedCISA KEV
  5. 2025-01-2916:37SSVC exploitation set to activeCISA-ADP

Versions per branch

NVD
Google android
BranchAffectedFixed in
—all versionsno fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As google_android, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Android
    Affected
    • = Android kernelno fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2022-03-16

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • :unknown:Androidfrom Pixel-family specific:0 · fixed in Pixel-family specific:2022-03-05

Full record on NVD

Fix

  1. CISA’s required action: Apply updates per vendor instructions.due 2022-05-02

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-04-11
Patch Due Date
2022-05-02
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2022-03-16
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-mx45-vcw4-89j8

Frequently asked questions

What is CVE-2021-39793?

In kbase_jd_user_buf_pin_pages of mali_kbase_mem.c, there is a possible out of bounds write due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-210470189References: N/A

Is CVE-2021-39793 actively exploited?

Yes. CVE-2021-39793 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-05-02.

What is the CVSS score for CVE-2021-39793?

CVE-2021-39793 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record