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Vulnerability · Published May 24, 2024 · Assigned by Linux

CVE-2021-47538rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer()

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. 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 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 85.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer() Need to call rxrpc_put_local() for peer candidate before kfree() as it holds a ref to rxrpc_local. [DH: v2: Changed to abstract the peer freeing code out into a function]

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.15.15-1DEBIAN-CVE-2021-47538
Debian:13linux5.15.15-1DEBIAN-CVE-2021-47538
Debian:14linux5.15.15-1DEBIAN-CVE-2021-47538
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-47538
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-47538
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-47538

Affected products (as reported)

VendorProductVersions
Linux Linux e8e51ce79c157188e209e5ea0afaf6b42dd76104 – before 913c24af2d13a3fd304462916ee98e298d56bdce9ebeddef58c41bd700419cdcece24cf64ce32276 – before 3e70e3a72d80b16094faccbe438cd53761c3503a9ebeddef58c41bd700419cdcece24cf64ce32276 – before 60f0b9c42cb80833a03ca57c1c8b078d716e71d19ebeddef58c41bd700419cdcece24cf64ce32276 – before 9469273e616ca8f1b6e3773c5019f21b4c8d828c9ebeddef58c41bd700419cdcece24cf64ce32276 – before beacff50edbd6c9659a6f15fc7f6126909fade299b7fc03b4cdbfb668b6891967105258691c6d3b54.19.82 – before 4.19.2205.3.9 – before 5.4
Linux Linux 5.4

References