CVE-2021-39634

highpriority · track · 31EPSS 0.002 · 4 %ileDEEUFRUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.15% (4th) EPSS
CVSS 7.2 · high
Is it mine?
5 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · osv · cisa_csaf_ot

EPSS · scored 2026-10-22

In fs/eventpoll.c, there is a possible use after free. 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-204450605References: Upstream kernel

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedSIMATIC RF160B (6GT2003-0FA00)siemens_psirt

    Update to V2.2 or later version

  • MitigationSIMATIC RF160B (6GT2003-0FA00)cisa_csaf_ot

    Siemens has released a new version (V2.2) for SIMATIC RF160B and recommends to update to the latest version.

02

cvss

Technical severity, 0–10. One row per scoring source.

7.8
010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · CISA US
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416USprimaryCWE-416USCWE-416US
04

affected products (5)

Products and version ranges known to be affected.

05

advisories (4)

Vendor and ecosystem advisories describing this.

  • SSA-770721SSA-770721: Multiple Vulnerabilities in SIMATIC RF160B before V2.22024-03-12csaf · siemens_psirtDE

    SIMATIC RF160B contain multiple vulnerabilities of different types that could allow an attacker to execute arbitrary code within the context of a privileged process. Siemens has released a new version for SIMATIC RF160B and recommends to update to the latest version.

  • ICSA-24-074-07Siemens SIMATIC2024-03-14icsa · cisa_csaf_otUS

    Successful exploitation of these vulnerabilities could allow an attacker to execute arbitrary code within the context of a privileged process.

  • ASB-A-2044506052022-01-01vendor · osvUS

    In fs/eventpoll.c, there is a possible use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

  • CERTFR-2026-AVI-1333Multiples vulnérabilités dans le noyau Linux d'UbuntuFrançais2026-10-16vendor · certfrFR
06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdosvcisa_csaf_otnvdsiemens_psirtcertfrNVDCVE.orgMITRE
published 2022-01-14modified 2026-06-17
09

references (8)

External citations — patches, advisories, analysis.

scry

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