Home/CVE/A double-free flaw was found in the Linux kernel’s TUN/TAP device driver functionality in how a user registers the dev
CVE

CVE-2022-4744

A double-free flaw was found in the Linux kernel’s TUN/TAP device driver functionality in how a user registers the dev

A double-free flaw was found in the Linux kernel’s TUN/TAP device driver functionality in how a user registers the device when the register_netdevice function fails (NETDEV_REGISTER notifier). This flaw allows a local user to crash or potentially escalate their privileges on the system.

HIGH · CVSS 7.8 EPSS 0.00098
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-415Double Free
CWE-460Improper Cleanup on Thrown Exception
▤

Affected Products & Versions

2
linux kernel>= 5.5 and < 5.10.136
linux kernel>= 5.11 and < 5.15.12
⚠

Public Exploits & PoCs

1
pocpacketstormsecurity.com · CentOS-Stream-9-Missing-Kernel-Security-Fix.htmlpacketstormsecurity.com
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · secalert@redhat.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 NVD30 Mar 2023 · 09:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
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

30
rhsaRHSA-2023:7077Moderate
rhsaRHSA-2024:1404Moderate
suse-csafSUSE-SU-2024:1489-1
suse-csafSUSE-SU-2024:1490-1
suse-csafSUSE-SU-2024:1480-1
🔗

References & Sources

3
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/netdev/net.git/commit/?id=158b515f703eVendor Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.htmlMailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20230526-0009/Third Party Advisory
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