Vulnerability · Published Dec 23, 2022 · Assigned by mitre
CVE-2022-47939
Critical 9.8
In plain English
A critical-severity use-after-free in the linux package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 49.3% (higher than 99% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)49.3%top 1.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An issue was discovered in ksmbd in the Linux kernel 5.15 through 5.19 before 5.19.2. fs/ksmbd/smb2pdu.c has a use-after-free and OOPS for SMB2_TREE_DISCONNECT.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.19.6-1 | DEBIAN-CVE-2022-47939 |
| Debian:13 | linux | 5.19.6-1 | DEBIAN-CVE-2022-47939 |
| Debian:14 | linux | 5.19.6-1 | DEBIAN-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux | 5.15.0-53.59 | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1023.27 | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1023.29 | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1024.30.1 | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1022.29 | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1020.25 | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1008.12 | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1018.21 | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1018.23 | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1021.26 | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-53.59 | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1015.15 | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1022.28 | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1018.20 | UBUNTU-CVE-2022-47939 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2022-47939 |
| Ubuntu:22.04:LTS | linux-riscv | 5.15.0-1023.27 | UBUNTU-CVE-2022-47939 |
Affected products (as reported)
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2
- https://github.com/torvalds/linux/commit/cf6531d98190fa2cf92a6d8bbc8af0a4740a223c
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf6531d98190fa2cf92a6d8bbc8af0a4740a223c
- http://www.openwall.com/lists/oss-security/2022/12/23/10
- https://www.zerodayinitiative.com/advisories/ZDI-22-1690/
- https://www.secpod.com/blog/zero-day-server-message-block-smb-server-in-linux-kernel-5-15-has-a-critical-vulnerability-patch-ksmbd-immediately/