CVE-2022-3910
Use After Free vulnerability in Linux Kernel allows Privilege Escalation.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.04%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Use After Free vulnerability in Linux Kernel allows Privilege Escalation. An improper Update of Reference Count in io_uring leads to Use-After-Free and Local Privilege Escalation. When io_msg_ring was invoked with a fixed file, it called io_fput_file() which improperly decreased its reference count (leading to Use-After-Free and Local Privilege Escalation). Fixed files are permanently registered to the ring, and should not be put separately. We recommend upgrading past commit https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679 https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.04% probability · 62th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- cve-coordination@google.com
References
- https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679Patch, Third Party Advisory
- https://kernel.dance/#fc7222c3a9f56271fba02aabbfbae999042f1679Patch, Third Party Advisory
- https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679Patch, Third Party Advisory
- https://kernel.dance/#fc7222c3a9f56271fba02aabbfbae999042f1679Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.