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Vulnerability · Published May 21, 2024 · Assigned by Linux

CVE-2021-47357atm: iphase: fix possible use-after-free in ia_module_exit()

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 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.2%top 83.9% 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: atm: iphase: fix possible use-after-free in ia_module_exit() This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.14.6-1DEBIAN-CVE-2021-47357
Debian:13linux5.14.6-1DEBIAN-CVE-2021-47357
Debian:14linux5.14.6-1DEBIAN-CVE-2021-47357
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-47357
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-47357
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-47357

Affected products (as reported)

VendorProductVersions
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 9e161687855175334ca93c6c3ccb2217311944791da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before a832ee2f2145f57443b2d565f8cb5490e8339f421da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before bcdd2be48edd8c6867fb44112cb8d18086beae291da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 89ce0b0747f319eb70f85bc820dcc43cebbd54171da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before c9172498d4d62c9b64e5fb37c1ee0343e65fe51b1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before e759ff76ebbbfcdcf83b6634c54dc47828573d8b1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before b58d246a058ae88484758cd4ab27b3180fd5ecf81da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before d1fb12412874c94ad037e11d0ecdd1140a439297
Linux Linux 2.6.12

References