CVE-2021-3923: fedoraproject fedora

Modified

AliasesUBUNTU-CVE-2021-3923DEBIAN-CVE-2021-3923

Published 27-03-2023Last modified 24-02-2025

Vulnerability summary

CVE-2021-3923 is a low (CVSS 2.3) vulnerability in fedoraproject fedora. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.7% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 2.3, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

2.3/10

010

Low · v3.1 (CVE.org)

EPSS score

0.20%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 10 · Related 8

RHSA-2022:1975 RHSA-2022:1988 SUSE-SU-2023:1800-1 SUSE-SU-2023:1801-1 SUSE-SU-2023:1803-1 SUSE-SU-2023:1811-1+4 more

Timeline

27-03-2023
PublishedVulnerability first disclosed.
24-02-2025
Last modifiedVulnerability information updated.

Description

A flaw was found in the Linux kernel's implementation of RDMA over infiniband. An attacker with a privileged local account can leak kernel stack information when issuing commands to the /dev/infiniband/rdma_cm device node. While this access is unlikely to leak sensitive user information, it can be further used to defeat existing kernel protection mechanisms.

CVSS metrics

5 scores · 4 sources · 2 versions

v4.04.8v3.12.3

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.20% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-200Exposure of Sensitive Information to an Unauthorized ActorThe product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Affected systems

Version check

Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu67 products

linux< 4.15.0-173.182 | < 5.4.0-105.119
linux-aws< 4.15.0-1124.133 | < 5.4.0-1069.73
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)
linux-aws-5.13All versions (No fix recorded)

linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1069.73~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2064.67 | All versions (No fix recorded) | < 5.4.0-1069.73+fips2
linux-aws-hwe< 4.15.0-1124.133~16.04.1
linux-azure< 4.15.0-1134.147~14.04.1 | < 4.15.0-1134.147~16.04.1 | All versions (No fix recorded) | < 5.4.0-1073.76
linux-azure-4.15< 4.15.0-1134.147
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1073.76~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fips< 4.15.0-2046.50 | All versions (No fix recorded) | < 5.4.0-1073.76+fips1
linux-bluefield< 5.4.0-1032.35
linux-dell300x< 4.15.0-1038.43
linux-fips< 4.15.0-1081.90 | All versions (No fix recorded) | < 5.4.0-1046.52
linux-gcp< 4.15.0-1119.133~16.04.1 | All versions (No fix recorded) | < 5.4.0-1068.72
linux-gcp-4.15< 4.15.0-1119.133
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1068.72~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-fips< 4.15.0-2029.32 | All versions (No fix recorded) | < 5.4.0-1067.71~20.04.1
linux-gke< 5.4.0-1066.69
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1037.38
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-173.182~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.4< 5.4.0-105.119~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1018.20
linux-ibm-5.4< 5.4.0-1018.20~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-kvm< 4.15.0-1110.113 | < 5.4.0-1059.62
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oracle< 4.15.0-1090.99~16.04.1 | < 4.15.0-1090.99 | < 5.4.0-1067.72
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1067.72~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1056.63
linux-raspi-5.4< 5.4.0-1056.63~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2< 4.15.0-1106.113 | All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded)
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-snapdragon< 4.15.0-1123.132