CVE-2022-4696 — Release of Invalid Pointer or Reference in Kernel
Severity
7.8HIGHNVD
EPSS
0.0%
top 96.32%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJan 11
Latest updateApr 1
Description
There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation. If IORING_OP_SPLICE is missing the IO_WQ_WORK_FILES flag, which signals that the operation won't use current->nsproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current->nsproxy leading to invalidly decreasing its reference counter later causing the use-after-fr…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9
Affected Packages8 packages
Patches
🔴Vulnerability Details
3📋Vendor Advisories
4Microsoft▶
There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation. If IORING_OP_SPLICE is missing the IO_WQ_WORK_FILES flag which signals that the ope↗2023-01-10
Debian▶
CVE-2022-4696: linux - There exists a use-after-free vulnerability in the Linux kernel through io_uring...↗2022