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Vulnerability · Published Jul 22, 2022 · Assigned by Google

CVE-2022-2327Use-after-free in io_uring ad work_flags in Linux Kernel

High 7.5

In plain English

A high-severity use-after-free in Linux Kernel from Linux Kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 76.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

io_uring use work_flags to determine which identity need to grab from the calling process to make sure it is consistent with the calling process when executing IORING_OP. Some operations are missing some types, which can lead to incorrect reference counts which can then lead to a double free. We recommend upgrading the kernel past commit df3f3bb5059d20ef094d6b2f0256c4bf4127a859

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.14.6-1DEBIAN-CVE-2022-2327
Debian:13linux5.14.6-1DEBIAN-CVE-2022-2327
Debian:14linux5.14.6-1DEBIAN-CVE-2022-2327
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-2327

Affected products (as reported)

VendorProductVersions
Linux Kernel Linux Kernel unspecified – before df3f3bb5059d20ef094d6b2f0256c4bf4127a859

Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

References