Vulnerability · Published May 30, 2023 · Assigned by canonical
CVE-2023-2612shiftfs lock unbalance in Ubuntu-specific kernels
Medium 4.4
In plain English
A medium-severity security flaw in ubuntu-linux from Canonical Ltd.. 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 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.4Medium
Exploit odds (30 days)0.3%top 78.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu Linux kernel contained a race condition when handling inode locking in some situations. A local attacker could use this to cause a denial of service (kernel deadlock).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | linux | 5.15.0-73.80 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux | 5.15.0-73.80 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1037.41 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1037.41 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1039.46 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1039.46 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1039.46.1 | USN-6135-1 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1039.46.1 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1035.43 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1035.43 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1034.39 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1034.39 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1021.26 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1021.26 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | 5.19.0-43.44~22.04.1 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | 5.19.0-43.44~22.04.1 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1031.34 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1031.34 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1031.36 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1031.36 | USN-6150-1 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1034.39 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1034.39 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-73.80 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-73.80 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | 5.19.0-1025.26~22.04.1 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1026.26 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | 5.15.0-1014.14 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | 5.17.0-1032.33 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | 5.17.0-1032.33 | USN-6124-1 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | 6.0.0-1017.17 | USN-6123-1 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | 6.0.0-1017.17 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | 6.1.0-1013.13 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | 6.1.0-1013.13 | USN-6122-1 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1036.42 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1036.42 | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1030.32 | USN-6150-1 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1030.32 | UBUNTU-CVE-2023-2612 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2023-2612 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2023-2612 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Canonical Ltd. | ubuntu-linux | 0 – before 02b47547824b1cd0d55c6744f91886f04de8947e |
Weakness: CWE-667 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
References
- https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/kinetic/commit/?id=02b47547824b1cd0d55c6744f91886f04de8947e patch
- https://ubuntu.com/security/CVE-2023-2612 vendor-advisory
- https://ubuntu.com/security/notices/USN-6122-1 vendor-advisory
- https://ubuntu.com/security/notices/USN-6123-1 vendor-advisory
- https://ubuntu.com/security/notices/USN-6124-1 vendor-advisory
- https://ubuntu.com/security/notices/USN-6127-1 vendor-advisory
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html