Vulnerability · Published Feb 12, 2025 · Assigned by Linux
CVE-2025-21694fs/proc: fix softlockup in __read_vmcore (part 2)
Medium 5.5
In plain English
A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 84.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In the Linux kernel, the following vulnerability has been resolved: fs/proc: fix softlockup in __read_vmcore (part 2) Since commit 5cbcb62dddf5 ("fs/proc: fix softlockup in __read_vmcore") the number of softlockups in __read_vmcore at kdump time have gone down, but they still happen sometimes. In a memory constrained environment like the kdump image, a softlockup is not just a harmless message, but it can interfere with things like RCU freeing memory, causing the crashdump to get stuck. The second loop in __read_vmcore has a lot more opportunities for natural sleep points, like scheduling out while waiting for a data write to happen, but apparently that is not always enough. Add a cond_resched() to the second loop in __read_vmcore to (hopefully) get rid of the softlockups.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 6.1.128-1 | DEBIAN-CVE-2025-21694 |
| Debian:13 | linux | 6.12.11-1 | DEBIAN-CVE-2025-21694 |
| Debian:14 | linux | 6.12.11-1 | DEBIAN-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux | 5.15.0-135.146 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux | 6.8.0-62.65 | USN-7595-1 |
| Ubuntu:24.04:LTS | linux | 6.8.0-62.65 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1080.87 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-aws | 6.8.0-1030.32 | USN-7595-1 |
| Ubuntu:24.04:LTS | linux-aws | 6.8.0-1030.32 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-aws-6.5 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 6.8.0-1030.32~22.04.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 6.8.0-1030.32~22.04.1 | USN-7595-1 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1084.93 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-azure | 6.8.0-1030.35 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-azure | 6.8.0-1030.35 | USN-7596-1 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-azure-6.11 | 6.11.0-1013.13~24.04.1 | USN-7448-1 |
| Ubuntu:24.04:LTS | linux-azure-6.11 | 6.11.0-1013.13~24.04.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-azure-6.5 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-azure-6.8 | 6.8.0-1030.35~22.04.1 | USN-7596-1 |
| Ubuntu:22.04:LTS | linux-azure-6.8 | 6.8.0-1030.35~22.04.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1084.93.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-azure-nvidia | 6.8.0-1018.19 | USN-7596-2 |
| Ubuntu:24.04:LTS | linux-azure-nvidia | 6.8.0-1018.19 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1079.88 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1031.33 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1031.33 | USN-7595-5 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-gcp-6.11 | 6.11.0-1013.13~24.04.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-gcp-6.5 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 6.8.0-1031.33~22.04.1 | USN-7595-5 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 6.8.0-1031.33~22.04.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1077.83 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1026.30 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1026.30 | USN-7595-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1062.70 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-gkeop | 6.8.0-1013.15 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-gkeop | 6.8.0-1013.15 | USN-7595-1 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | 6.11.0-24.24~24.04.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | 6.11.0-24.24~24.04.1 | USN-7445-1 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-hwe-6.5 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | 6.8.0-64.67~22.04.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1072.75 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-ibm | 6.8.0-1027.27 | USN-7595-1 |
| Ubuntu:24.04:LTS | linux-ibm | 6.8.0-1027.27 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-ibm-6.8 | 6.8.0-1027.27~22.04.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | 5.15.0-1073.75 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1075.81 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1076.81 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-135.146 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-lowlatency | 6.8.0-62.65.1 | USN-7595-1 |
| Ubuntu:24.04:LTS | linux-lowlatency | 6.8.0-62.65.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-lowlatency-hwe-6.11 | 6.11.0-1012.13~24.04.1 | USN-7445-1 |
| Ubuntu:24.04:LTS | linux-lowlatency-hwe-6.11 | 6.11.0-1012.13~24.04.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.5 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 6.8.0-62.65.1~22.04.1 | USN-7595-1 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 6.8.0-62.65.1~22.04.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1074.75 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-nvidia | 6.8.0-1029.32 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-nvidia | 6.8.0-1029.32 | USN-7595-1 |
| Ubuntu:24.04:LTS | linux-nvidia-6.11 | 6.11.0-1007.7 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-nvidia-6.5 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | 6.8.0-1029.32~22.04.1 | USN-7595-1 |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | 6.8.0-1029.32~22.04.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 6.8.0-1029.32.1 | USN-7595-1 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 6.8.0-1029.32.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | 5.15.0-1033.33 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-nvidia-tegra | 6.8.0-1008.8 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra-igx | 5.15.0-1021.21 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | 6.11.0-1020.20 | USN-7445-1 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | 6.11.0-1020.20 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-oem-6.5 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-oem-6.8 | 6.8.0-1029.29 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-oem-6.8 | 6.8.0-1029.29 | USN-7595-1 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1077.83 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1027.28 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1027.28 | USN-7595-4 |
| Ubuntu:22.04:LTS | linux-oracle-6.5 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 6.8.0-1027.28~22.04.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 6.8.0-1027.28~22.04.1 | USN-7595-4 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1074.77 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-raspi | 6.8.0-1029.33 | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-raspi | 6.8.0-1029.33 | USN-7595-4 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-riscv-6.5 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-riscv-6.8 | 6.8.0-62.65~22.04.1 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-starfive-6.5 | no fix listed | UBUNTU-CVE-2025-21694 |
| Ubuntu:24.04:LTS | linux-xilinx | 6.8.0-1017.18 | UBUNTU-CVE-2025-21694 |
| Ubuntu:22.04:LTS | linux-xilinx-zynqmp | 5.15.0-1044.48 | UBUNTU-CVE-2025-21694 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 803d5a33d5ffdc2d86dcc0cfa01655a330612cdb – before 84c4ed15626574c9ac6c1039ba9c137a77bcc7f270c1835e776c8447c1aca87ddb38cfe764fe756a – before 80da29deb88a3a907441fc35bb7bac309f31e713e1b160a50c756e0efbea290b9bf5117cb80e8c4b – before 649b266606bc413407ce315f710c8ce8a88ee30aa373ad833a6bfe4bc6cedcf7e56a99cc6fd9a193 – before 65c367bd9d4f43513c7f837df5753bea9561b836518fbd644dabb6aedbdd4939c6c9cc1bf651459f – before a5a2ee8144c3897d37403a69118c3e3dc57139585cbcb62dddf5346077feb82b7b0c9254222d3445 – before 80828540dad0757b6337c6561d49c81038f38d875cbcb62dddf5346077feb82b7b0c9254222d3445 – before cbc5dde0a461240046e8a41c43d7c3b76d5db9527bdf1d550ddfcd9ab797087421f77b7aceddc8a7 |
| Linux | Linux | 6.10 |
References
- https://git.kernel.org/stable/c/84c4ed15626574c9ac6c1039ba9c137a77bcc7f2
- https://git.kernel.org/stable/c/80da29deb88a3a907441fc35bb7bac309f31e713
- https://git.kernel.org/stable/c/649b266606bc413407ce315f710c8ce8a88ee30a
- https://git.kernel.org/stable/c/65c367bd9d4f43513c7f837df5753bea9561b836
- https://git.kernel.org/stable/c/a5a2ee8144c3897d37403a69118c3e3dc5713958
- https://git.kernel.org/stable/c/80828540dad0757b6337c6561d49c81038f38d87
- https://git.kernel.org/stable/c/cbc5dde0a461240046e8a41c43d7c3b76d5db952
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html