CVE-2021-26708

mediumpriority · track · 39EPSS 0.016 · 76 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

3 exploits · PoC

Likely / severe?

1.60% (76th) EPSS

CVSS 6.9 · medium

Is it mine?

21 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.

cvss

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

7.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–7

v2.06.9mediumAV:L/AC:M/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.4 · impact 10

v3.17highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1 · impact 5.9

v3.17highAV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.16.6mediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-667USprimaryCWE-269USCWE-362USCWE-667US

exploits (3)

Public proof-of-concept and weaponised exploit code.

affected products (21)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Canonical Ltd. Ubuntu≤ 20.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 20.10fstec_bduRU
Red Hat Inc. OpenShift Container Platform≤ 4.4fstec_bduRU
Red Hat Inc. OpenShift Container Platform≤ 4.6fstec_bduRU
Red Hat Inc. OpenShift Container Platform≤ 4.5fstec_bduRU
Red Hat Inc. Red Hat Enterprise Linux≤ 8fstec_bduRU
АО «НППКТ» ОСОН ОСнова Оnyx≤ 2.4fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 10fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 11fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 9fstec_bduRU
Сообщество свободного программного обеспечения Linux5.5 → 5.10.12fstec_bduRU
linux linux kernel5.5 → 5.10.13nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
netapp aff baseboard management controllerall versionsnvdUScpe:2.3:a:netapp:aff_baseboard_management_controller:*:*:*:*:*:*:*:*
netapp baseboard management controller 500f firmware< 15.3nvdUScpe:2.3:o:netapp:baseboard_management_controller_500f_firmware:*:*:*:*:*:*:*:*
netapp baseboard management controller a250 firmware< 15.3nvdUScpe:2.3:o:netapp:baseboard_management_controller_a250_firmware:*:*:*:*:*:*:*:*
netapp cloud backupall versionsnvdUScpe:2.3:a:netapp:cloud_backup:*:*:*:*:*:*:*:*
netapp fas baseboard management controllerall versionsnvdUScpe:2.3:a:netapp:fas_baseboard_management_controller:*:*:*:*:*:*:*:*
netapp hci h410c firmwareall versionsnvdUScpe:2.3:o:netapp:hci_h410c_firmware:*:*:*:*:*:*:*:*
netapp solidfire & hci management nodeall versionsnvdUScpe:2.3:a:netapp:solidfire_\&_hci_management_node:*:*:*:*:*:*:*:*

showing 20 of 21

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2021-02-05modified 2026-06-17

related (1,369)

Related entries.

ID	severity	EPSS	exploitable	published
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CVE-2021-1782US	high7.0OT critical	2.22% (83rd)	KEV	2021-04-02
A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tv…
CVE-2019-10072US	high7.5	73.0% (99th)	—	2019-06-21
The fix for CVE-2019-0199 was incomplete and did not address HTTP/2 connection window exhaustion on write in Apache Tomcat versions 9.0.0.M1 to 9.0.19 and 8.5.0 to 8.5.40 . By not…
CVE-2002-1850US	high7.5	17.4% (97th)	Exploit	2002-12-31
mod_cgi in Apache 2.0.39 and 2.0.40 allows local users and possibly remote attackers to cause a denial of service (hang and memory consumption) by causing a CGI script to send a la…
CVE-2020-29661US	high7.8	1.12% (66th)	Exploit	2020-12-09
A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf…

+1364 more

references (37)

External citations — patches, advisories, analysis.

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