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Vulnerability · Published Jun 18, 2025 · Assigned by Linux

CVE-2022-49935dma-buf/dma-resv: check if the new fence is really later

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 7% 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 93.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: dma-buf/dma-resv: check if the new fence is really later Previously when we added a fence to a dma_resv object we always assumed the the newer than all the existing fences. With Jason's work to add an UAPI to explicit export/import that's not necessary the case any more. So without this check we would allow userspace to force the kernel into an use after free error. Since the change is very small and defensive it's probably a good idea to backport this to stable kernels as well just in case others are using the dma_resv object in the same way.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.19.11-1DEBIAN-CVE-2022-49935
Debian:13linux5.19.11-1DEBIAN-CVE-2022-49935
Debian:14linux5.19.11-1DEBIAN-CVE-2022-49935
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2022-49935
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-49935
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-49935
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2022-49935
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2022-49935

Affected products (as reported)

VendorProductVersions
Linux Linux 27836b641c1bf693c96c627388497b4e0f57441b – before c4c798fe98adceb642050819cb57cbc8f5c2787027836b641c1bf693c96c627388497b4e0f57441b – before a3f7c10a269d5b77dd5822ade822643ced3057f0
Linux Linux 5.0

References