CVE-2021-23134
Linux kernel llcp_sock_bind/connect use-after-free
HIGH
7.8
CVSS Score
Published: May 12, 2021 at 10:45 PM UTC
Updated: July 30, 2026 at 07:59 PM UTC
17 products affected across 5 vendorsLinux KernelDebian LinuxFedora
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Severity
HIGH7.8
Exploit prediction
EPSS 0.4%
Description
Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local user with the CAP_NET_RAW capability.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%v < 4.4.2694.10 ≤ v < 4.14.2334.15 ≤ v < 4.19.1914.20 ≤ v < 5.4.1194.5 ≤ v < 4.9.2695.11 ≤ v < 5.11.215.12 ≤ v < 5.12.45.5 ≤ v < 5.10.37
Affected range stops below 4.14.233, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.19.191, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.269, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.9.269, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.10.37, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.11.21, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.12.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.119, so it looks safe — our inference, not a vendor statement
Cloud Backup· NetAppdrupal
95%All versions
All versions
netapp-solidfire-baseboard-management-controller (same device)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=c61760e6940d
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LZYORWNQIHNWRFYRDXBWYWBYM46PDZEN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QALNQT4LJFVSSA3MWCIECVY4AFPP4X77/
- https://www.openwall.com/lists/oss-security/2021/05/11/4
References (7)
x_refsource_MISCMailing ListPatchVendor Advisory
Source: [email protected]
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=c61760e6940dMailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlVendor Advisoryx_refsource_FEDORAThird Party Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LZYORWNQIHNWRFYRDXBWYWBYM46PDZEN/Vendor Advisoryx_refsource_FEDORAThird Party Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QALNQT4LJFVSSA3MWCIECVY4AFPP4X77/x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20210625-0007/x_refsource_MISCMailing ListPatchThird Party Advisory
Source: [email protected]
https://www.openwall.com/lists/oss-security/2021/05/11/4CVSS
7.8HIGHpalo_alto
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusANALYZED
CWE
CWE-416
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