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Vulnerability · Published Aug 21, 2024 · Assigned by Linux

CVE-2022-48872misc: fastrpc: Fix use-after-free race condition for maps

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 3.1)7.8High
Exploit odds (30 days)0.2%top 84.3% 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: misc: fastrpc: Fix use-after-free race condition for maps It is possible that in between calling fastrpc_map_get() until map->fl->lock is taken in fastrpc_free_map(), another thread can call fastrpc_map_lookup() and get a reference to a map that is about to be deleted. Rewrite fastrpc_map_get() to only increase the reference count of a map if it's non-zero. Propagate this to callers so they can know if a map is about to be deleted. Fixes this warning: refcount_t: addition on 0; use-after-free. WARNING: CPU: 5 PID: 10100 at lib/refcount.c:25 refcount_warn_saturate ... Call trace: refcount_warn_saturate [fastrpc_map_get inlined] [fastrpc_map_lookup inlined] fastrpc_map_create fastrpc_internal_invoke fastrpc_device_ioctl __arm64_sys_ioctl invoke_syscall

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.8-1DEBIAN-CVE-2022-48872
Debian:13linux6.1.8-1DEBIAN-CVE-2022-48872
Debian:14linux6.1.8-1DEBIAN-CVE-2022-48872
Ubuntu:22.04:LTSlinux5.15.0-70.77UBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-aws5.15.0-1034.38UBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-azure5.15.0-1036.43UBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1036.43.1UBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-gcp5.15.0-1032.40UBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-gke5.15.0-1031.36UBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1018.23UBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-ibm5.15.0-1028.31UBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1028.33UBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-kvm5.15.0-1031.36UBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-70.77UBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1023.23UBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-oracle5.15.0-1033.39UBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-raspi5.15.0-1027.29UBUNTU-CVE-2022-48872
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2022-48872
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2022-48872

Affected products (as reported)

VendorProductVersions
Linux Linux c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 – before 556dfdb226ce1e5231d8836159b23f8bb0395bf4c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 – before b171d0d2cf1b8387c72c8d325c5d5746fa271e39c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 – before 61a0890cb95afec5c8a2f4a879de2b6220984ef1c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 – before 079c78c68714f7d8d58e66c477b0243b31806907c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 – before 96b328d119eca7563c1edcc4e1039a62e6370ecb
Linux Linux 5.1

References