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Vulnerability · Published May 24, 2024 · Assigned by Linux

CVE-2021-47521can: sja1000: fix use after free in ems_pcmcia_add_card()

High 7.8

In plain English

A high-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)7.8High
Exploit odds (30 days)0.2%top 84.5% 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: can: sja1000: fix use after free in ems_pcmcia_add_card() If the last channel is not available then "dev" is freed. Fortunately, we can just use "pdev->irq" instead. Also we should check if at least one channel was set up.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.15.15-1DEBIAN-CVE-2021-47521
Debian:13linux5.15.15-1DEBIAN-CVE-2021-47521
Debian:14linux5.15.15-1DEBIAN-CVE-2021-47521
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-47521
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-47521
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-47521

Affected products (as reported)

VendorProductVersions
Linux Linux fd734c6f25aea4b2b44b045e489aec67b388577e – before cbd86110546f7f730a1f5d7de56c944a336c15c4fd734c6f25aea4b2b44b045e489aec67b388577e – before 1dd5b819f7e406dc15bbc7670596ff25261aaa2afd734c6f25aea4b2b44b045e489aec67b388577e – before c8718026ba287168ff9ad0ccc4f9a413062cba36fd734c6f25aea4b2b44b045e489aec67b388577e – before ccf070183e4655824936c0f96c4a2bcca93419aafd734c6f25aea4b2b44b045e489aec67b388577e – before 1a295fea90e1acbe80c6d4940f5ff856edcd6becfd734c6f25aea4b2b44b045e489aec67b388577e – before 923f4dc5df679f678e121c20bf2fd70f7bf3e288fd734c6f25aea4b2b44b045e489aec67b388577e – before 474f9a8534f5f89841240a7e978bafd6e1e039cefd734c6f25aea4b2b44b045e489aec67b388577e – before 3ec6ca6b1a8e64389f0212b5a1b0f6fed1909e45
Linux Linux 3.2

References