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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Canonical | ubuntu-linux | < 02b47547824b1cd0d55c6744f91886f04de8947e | 02b47547824b1cd0d55c6744f91886f04de8947e |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1017.19 | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-73.80 | USN-6127-1 |
| 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-fde | 5.15.0-1039.46.1 | USN-6135-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1035.43 | USN-6127-1 |
| Ubuntu 22.04 LTS | linux-gke +1 | 5.15.0-1034.39 | USN-6127-1 |
| 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-ibm | 5.15.0-1031.34 | USN-6127-1 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1031.36 | USN-6150-1 |
| Ubuntu 22.04 LTS | linux-lowlatency-hwe-5.19 | 5.19.0-1025.26~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1026.26 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1014.14 | — |
| 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-6.1 | 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-raspi | 5.15.0-1030.32 | USN-6150-1 |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-150.167 | USN-6131-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1103.111 | USN-6131-1 |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1037.41~20.04.1 | USN-6127-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1109.115 | USN-6131-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1039.46~20.04.1 | USN-6127-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1039.46~20.04.1.1 | USN-6135-1 |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1064.70 | USN-6132-1 |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1106.115 | USN-6131-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1035.43~20.04.1 | USN-6127-1 |
| Ubuntu 20.04 LTS | linux-gke | 5.4.0-1100.107 | USN-6131-1 |
| Ubuntu 20.04 LTS | linux-gke-5.15 | 5.15.0-1034.39~20.04.1 | USN-6127-1 |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1070.74 | USN-6131-1 |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1021.26~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-73.80~20.04.1 | USN-6127-1 |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1050.55 | USN-6131-1 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1031.36~20.04.1 | USN-6162-1 |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1017.18 | USN-6256-1 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1092.98 | USN-6131-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1014.14~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1102.111 | USN-6131-1 |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1036.42~20.04.1 | USN-6127-1 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1086.97 | USN-6150-1 |
| Ubuntu 20.04 LTS | linux-riscv +24 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1034.38~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-xilinx-zynqmp | 5.4.0-1024.28 | USN-6222-1 |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1103.111~18.04.1 | USN-6132-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1109.115~18.04.1 | USN-6131-1 |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1106.115~18.04.1 | USN-6131-1 |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-150.167~18.04.1 | USN-6131-1 |
| Ubuntu 18.04 LTS | linux-ibm-5.4 | 5.4.0-1050.55~18.04.1 | USN-6131-1 |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1102.111~18.04.1 | USN-6131-1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1086.97~18.04.1 | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1028.33 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1039.42 | — |
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1103.111+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1109.115+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1078.87 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1106.115+fips1 | — |
| Ubuntu Pro 22.04 LTS | linux +1 | 5.15.0-73.80 | LSN-0095-1 |
| Ubuntu Pro 22.04 LTS | linux-aws | 5.15.0-1037.41 | LSN-0095-1 |
| Ubuntu Pro 22.04 LTS | linux-azure | 5.15.0-1039.46 | LSN-0095-1 |
| Ubuntu Pro 22.04 LTS | linux-gcp | 5.15.0-1035.43 | LSN-0095-1 |
| Ubuntu Pro 22.04 LTS | linux-gke | 5.15.0-1034.39 | LSN-0095-1 |
| Ubuntu Pro 22.04 LTS | linux-ibm | 5.15.0-1031.34 | LSN-0095-1 |
| Ubuntu Pro 20.04 LTS | linux | 5.4.0-150.167 | LSN-0095-1 |
| Ubuntu Pro 20.04 LTS | linux-aws | 5.4.0-1103.111 | LSN-0095-1 |
| Ubuntu Pro 20.04 LTS | linux-aws-5.15 | 5.15.0-1037.41~20.04.1 | LSN-0095-1 |
| Ubuntu Pro 20.04 LTS | linux-azure | 5.4.0-1109.115 | LSN-0095-1 |
| Ubuntu Pro 20.04 LTS | linux-gcp | 5.4.0-1106.115 | LSN-0095-1 |
| Ubuntu Pro 20.04 LTS | linux-gcp-5.15 | 5.15.0-1035.43~20.04.1 | LSN-0095-1 |
| Ubuntu Pro 20.04 LTS | linux-gke | 5.4.0-1100.107 | LSN-0095-1 |
| Ubuntu Pro 20.04 LTS | linux-gke-5.15 | 5.15.0-1034.39~20.04.1 | LSN-0095-1 |
| Ubuntu Pro 20.04 LTS | linux-gkeop | 5.4.0-1070.74 | LSN-0095-1 |
| Ubuntu Pro 20.04 LTS | linux-ibm | 5.4.0-1050.55 | LSN-0095-1 |
| Ubuntu Pro 18.04 LTS | linux-aws-5.4 | 5.4.0-1103.111~18.04.1 | LSN-0095-1 |
| Ubuntu Pro 18.04 LTS | linux-azure-5.4 | 5.4.0-1109.115~18.04.1 | LSN-0095-1 |
| Ubuntu Pro 18.04 LTS | linux-gcp-5.4 | 5.4.0-1106.115~18.04.1 | LSN-0095-1 |
| Ubuntu Pro 18.04 LTS | linux-gke-5.4 +1 | No fix yet | LSN-0095-1 |
| Ubuntu Pro 18.04 LTS | linux-hwe-5.4 | 5.4.0-150.167~18.04.1 | LSN-0095-1 |
| Ubuntu Pro 18.04 LTS | linux-ibm-5.4 | 5.4.0-1050.55~18.04.1 | LSN-0095-1 |
Advisories 12
- USN-6256-1 linux-iot vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6222-1 linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6132-1 linux-aws-5.4, linux-bluefield vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6124-1 linux-oem-5.17 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6127-1 linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gke-5.15, linux-gkeop, linux-hwe-5.15, linux-hwe-5.19, linux-ibm, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-oracle, linux-oracle-5.15, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Sep 21, 2026
- USN-6131-1 linux, linux-aws, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gkeop, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-kvm, linux-oracle, linux-oracle-5.4 vulnerabilities Ubuntu Security Notices (USN) · Sep 21, 2026
- USN-6135-1 linux-azure-fde, linux-azure-fde-5.15 vulnerabilities Ubuntu Security Notices (USN) · Sep 21, 2026
- USN-6150-1 linux-intel-iotg, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Sep 21, 2026
- USN-6162-1 linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Sep 21, 2026
- LSN-0095-1 Kernel Live Patch Security Notice Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-6123-1 linux-oem-6.0 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-6122-1 linux-oem-6.1 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
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