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Vulnerability · Published Mar 27, 2023 · Assigned by redhat

CVE-2021-3923

Low 2.3

In plain English

A low-severity information exposure in kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)2.3Low
Exploit odds (30 days)0.2%top 90.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.15.15-1DEBIAN-CVE-2021-3923
Debian:13linux5.15.15-1DEBIAN-CVE-2021-3923
Debian:14linux5.15.15-1DEBIAN-CVE-2021-3923
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-3923
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-3923
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-3923
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-3923

Affected products (as reported)

VendorProductVersions
n/a kernel unknown

Weakness: CWE-200 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

References