What is CVE-2020-26088?

CVE-2020-26088 is a medium-severity vulnerability in Linux Kernel, classified under Incorrect Default Permissions. CVSS score: 5.5/10. Published 2020-09-24.

How severe is CVE-2020-26088?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2020-26088 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux Kernel

CVE-2020-26088

A missing CAP_NET_RAW check in NFC socket creation in net/nfc/rawsock.c in the Linux kernel before 5.8.2 could be used by local attackers to create raw sockets, bypassing security mechanisms, aka CID-26896f01467a.

Published 2020-09-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (31.5th percentile), scored 2026-09-28.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Linux Kernel
Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
Debian Linux — versions 9.0
openSUSE Leap — versions 15.1, 15.2

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

Public proof-of-concept exploits

evdenis/cvehound

References

github.com/torvalds/linux/commit/26896f01467a28651f7a536143fe5ac8449d4041 (Patch, Third Party Advisory)
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.2 (Patch, Release Notes, Vendor Advisory)
lists.debian.org/debian-lts-announce/2020/09/msg00025.html (mailing-list, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2020-10/msg00001.html (vendor-advisory, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html (vendor-advisory, Mailing List, Third Party Advisory)
usn.ubuntu.com/4578-1/ (vendor-advisory, Patch, Third Party Advisory)
lists.debian.org/debian-lts-announce/2020/10/msg00032.html (mailing-list, Mailing List, Third Party Advisory)
lists.debian.org/debian-lts-announce/2020/10/msg00034.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-26088?: CVE-2020-26088 is a medium-severity vulnerability in Linux Kernel, classified under Incorrect Default Permissions. CVSS score: 5.5/10. Published 2020-09-24.
How severe is CVE-2020-26088?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2020-26088 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.