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CVE-2021-22600

Linux Kernel Privilege Escalation Vulnerability

A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted syscalls to escalate privileges or deny service. We recommend upgrading kernel past the effected versions or rebuilding past ec6af094ea28f0f2dda1a6a33b14cd57e36a9755.

MEDIUM · CVSS 6.6 ⚠ CISA KEV EPSS 0.00179
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
Sigma rules0 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

⬡

Weakness Classification

CWE-415Double Free
CWE-415Double Free
▤

Affected Products & Versions

15
netapp 8300 firmwareall versions
netapp 8700 firmwareall versions
netapp a400 firmwareall versions
netapp c400 firmwareall versions
linux kernel>= 4.14.175 and < 4.14.259
linux kernel>= 4.19.114 and < 4.19.222
linux kernel>= 5.4.29 and < 5.4.168
linux kernel>= 5.5.14 and < 5.10.88
▣

Scoring & Timeline

6.6
MEDIUM · CVSS v3.1 · cve-coordination@google.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 Jan 2022 · 02:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

20
android-securityANDROID-2023-05-01High
android-securityANDROID-2022-05-01High
cisaKEV-CVE-2021-22600
suse-csafSUSE-SU-2022:0660-1
suse-csafSUSE-SU-2022:0619-1
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=ec6af094ea28f0f2dda1a6a33b14cd57e36a9755Mailing ListPatch
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20230110-0002/Third Party Advisory
https://www.debian.org/security/2022/dsa-5096Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22600US Government Resource
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