01 Record
CVE-2025-21655
io_uring/eventfd: ensure io_eventfd_signal() defers another RCU period
HighPUBLISHEDCNA: Linux
CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
02 Description
io_uring/eventfd: ensure io_eventfd_signal() defers another RCU period
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.25% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 16.5% of scored records. A rank, not a probability.
- NVD base score
- 4.7 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-10-15.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2025-01-20 13:48Z1 YR AGO
- Last updated
- 2026-10-15 01:02Z14 DAYS AGO
- Reserved
- 2024-12-29
- Assigning CNA
- Linux
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.8)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-416Use After FreeVariant
- Data version
- 5.2
- Document digest
- 75d2c16c33314b1b15d2fbf48ddb09d7045591464706d780731bf9c3519f11a2
05 Affected products
VendorProductVersionsPlatforms
LinuxLinux21a091b970cdbcf3e8ff829234b51be6f9192766 to < 6b63308c28987c6010b1180c72a6db4df6c68033, 21a091b970cdbcf3e8ff829234b51be6f9192766 to < 8efff2aa2d95dc437ab67c5b4a9f1d3f367baa10, 21a091b970cdbcf3e8ff829234b51be6f9192766 to < a7085c3ae43b86d4b3d1b8275e6a67f14257e3b7, 21a091b970cdbcf3e8ff829234b51be6f9192766 to < c9a40292a44e78f71258b8522655bffaf5753bdb, 6.1—
06 References
- git.kernel.orghttps://git.kernel.org/stable/c/6b63308c28987c6010b1180c72a6db4df6c68033
- git.kernel.orghttps://git.kernel.org/stable/c/8efff2aa2d95dc437ab67c5b4a9f1d3f367baa10
- git.kernel.orghttps://git.kernel.org/stable/c/a7085c3ae43b86d4b3d1b8275e6a67f14257e3b7
- git.kernel.orghttps://git.kernel.org/stable/c/c9a40292a44e78f71258b8522655bffaf5753bdb
- project-zero.issues.chromium.orghttps://project-zero.issues.chromium.org/issues/388499293
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-457936.html
07 Fixed in
AlmaLinux 10
- kernel Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug-devel Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug-devel-matched Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug-modules Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug-modules-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug-modules-extra Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-devel Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-devel-matched Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-modules Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-modules-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-modules-extra Fixed in 6.12.0-124.8.1.el10_1
- kernel-abi-stablelists Fixed in 6.12.0-124.8.1.el10_1
- kernel-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-cross-headers Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-devel Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-devel-matched Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-modules Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-modules-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-modules-extra Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-uki-virt Fixed in 6.12.0-124.8.1.el10_1
- kernel-devel Fixed in 6.12.0-124.8.1.el10_1
- kernel-devel-matched Fixed in 6.12.0-124.8.1.el10_1
- kernel-doc Fixed in 6.12.0-124.8.1.el10_1
- kernel-headers Fixed in 6.12.0-124.8.1.el10_1
- kernel-modules Fixed in 6.12.0-124.8.1.el10_1
- kernel-modules-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-modules-extra Fixed in 6.12.0-124.8.1.el10_1
- kernel-modules-extra-matched Fixed in 6.12.0-124.8.1.el10_1
- kernel-rt Fixed in 6.12.0-124.8.1.el10_1
- kernel-rt-64k Fixed in 6.12.0-124.8.1.el10_1
- kernel-rt-64k-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-rt-64k-debug Fixed in 6.12.0-124.8.1.el10_1
- kernel-rt-64k-debug-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-rt-64k-debug-devel Fixed in 6.12.0-124.8.1.el10_1
35 further packages in AlmaLinux 10 not shown (first 40 listed).
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 10
- kernel Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug-devel Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug-devel-matched Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug-modules Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug-modules-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-debug-modules-extra Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-devel Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-devel-matched Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-modules Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-modules-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-64k-modules-extra Fixed in 6.12.0-124.8.1.el10_1
- kernel-abi-stablelists Fixed in 6.12.0-124.8.1.el10_1
- kernel-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-cross-headers Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-devel Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-devel-matched Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-modules Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-modules-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-modules-extra Fixed in 6.12.0-124.8.1.el10_1
- kernel-debug-uki-virt Fixed in 6.12.0-124.8.1.el10_1
- kernel-devel Fixed in 6.12.0-124.8.1.el10_1
- kernel-devel-matched Fixed in 6.12.0-124.8.1.el10_1
- kernel-doc Fixed in 6.12.0-124.8.1.el10_1
- kernel-headers Fixed in 6.12.0-124.8.1.el10_1
- kernel-modules Fixed in 6.12.0-124.8.1.el10_1
- kernel-modules-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-modules-extra Fixed in 6.12.0-124.8.1.el10_1
- kernel-modules-extra-matched Fixed in 6.12.0-124.8.1.el10_1
- kernel-rt Fixed in 6.12.0-124.8.1.el10_1
- kernel-rt-64k Fixed in 6.12.0-124.8.1.el10_1
- kernel-rt-64k-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-rt-64k-debug Fixed in 6.12.0-124.8.1.el10_1
- kernel-rt-64k-debug-core Fixed in 6.12.0-124.8.1.el10_1
- kernel-rt-64k-debug-devel Fixed in 6.12.0-124.8.1.el10_1
35 further packages in CloudLinux 10 not shown (first 40 listed).
Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- linux Fixed in 6.1.128-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 6.12.10-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 6.12.10-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux-hwe-edge No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-azure No fix yet
- linux-azure-5.3 No fix yet
- linux-azure-edge No fix yet
- linux-gcp No fix yet
- linux-gcp-5.3 No fix yet
- linux-gke-4.15 No fix yet
- linux-gke-5.4 No fix yet
- linux-gkeop-5.4 No fix yet
- linux-hwe No fix yet
- linux-hwe-edge No fix yet
- linux-oem No fix yet
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- linux-aws-5.11 No fix yet
- linux-aws-5.13 No fix yet
- linux-aws-5.8 No fix yet
- linux-azure-5.11 No fix yet
- linux-azure-5.13 No fix yet
- linux-azure-5.8 No fix yet
- linux-azure-fde No fix yet
- linux-gcp-5.11 No fix yet
- linux-gcp-5.13 No fix yet
- linux-gcp-5.8 No fix yet
- linux-gke No fix yet
- linux-gke-5.15 No fix yet
- linux-gkeop No fix yet
- linux-gkeop-5.15 No fix yet
- linux-hwe-5.11 No fix yet
- linux-hwe-5.13 No fix yet
- linux-hwe-5.8 No fix yet
- linux-intel-5.13 No fix yet
- linux-oem-5.10 No fix yet
- linux-oem-5.13 No fix yet
- linux-oem-5.14 No fix yet
- linux-oem-5.6 No fix yet
- linux-oracle-5.11 No fix yet
- linux-oracle-5.13 No fix yet
- linux-oracle-5.8 No fix yet
- linux-raspi2 No fix yet
- linux-riscv No fix yet
- linux-riscv-5.11 No fix yet
- linux-riscv-5.8 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- linux-allwinner-5.19 No fix yet
- linux-aws-5.19 No fix yet
- linux-aws-6.2 No fix yet
- linux-aws-6.5 No fix yet
- linux-aws-6.8 Fixed in 6.8.0-1029.31~22.04.1
- linux-azure-5.19 No fix yet
- linux-azure-6.2 No fix yet
- linux-azure-6.5 No fix yet
- linux-azure-6.8 Fixed in 6.8.0-1029.34~22.04.1
- linux-azure-fde-5.19 No fix yet
- linux-azure-fde-6.2 No fix yet
- linux-gcp-5.19 No fix yet
- linux-gcp-6.2 No fix yet
- linux-gcp-6.5 No fix yet
- linux-gcp-6.8 Fixed in 6.8.0-1030.32~22.04.1
- linux-hwe-5.19 No fix yet
- linux-hwe-6.2 No fix yet
- linux-hwe-6.5 No fix yet
- linux-hwe-6.8 Fixed in 6.8.0-60.63~22.04.1
- linux-ibm-6.8 Fixed in 6.8.0-1026.26~22.04.1
- linux-intel-iot-realtime No fix yet
- linux-lowlatency-hwe-5.19 No fix yet
- linux-lowlatency-hwe-6.2 No fix yet
- linux-lowlatency-hwe-6.5 No fix yet
- linux-lowlatency-hwe-6.8 Fixed in 6.8.0-60.63.1~22.04.1
- linux-nvidia-6.2 No fix yet
- linux-nvidia-6.5 No fix yet
- linux-nvidia-6.8 Fixed in 6.8.0-1028.31~22.04.1
- linux-oem-5.17 No fix yet
- linux-oem-6.0 No fix yet
- linux-oem-6.1 No fix yet
- linux-oem-6.5 No fix yet
- linux-oracle-6.5 No fix yet
- linux-oracle-6.8 Fixed in 6.8.0-1026.27~22.04.1
- linux-realtime No fix yet
- linux-riscv No fix yet
- linux-riscv-5.19 No fix yet
- linux-riscv-6.5 No fix yet
- linux-riscv-6.8 Fixed in 6.8.0-62.65~22.04.1
- linux-starfive-5.19 No fix yet
2 further packages in Ubuntu 22.04 LTS not shown (first 40 listed).
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- linux Fixed in 6.8.0-60.63
- linux-aws Fixed in 6.8.0-1029.31
- linux-azure Fixed in 6.8.0-1029.34
- linux-azure-6.11 Fixed in 6.11.0-1012.12~24.04.1
- linux-azure-nvidia Fixed in 6.8.0-1016.17
- linux-gcp Fixed in 6.8.0-1030.32
- linux-gcp-6.11 Fixed in 6.11.0-1011.11~24.04.1
- linux-gke Fixed in 6.8.0-1025.29
- linux-gkeop Fixed in 6.8.0-1012.14
- linux-hwe-6.11 Fixed in 6.11.0-21.21~24.04.1
- linux-ibm Fixed in 6.8.0-1026.26
- linux-lowlatency Fixed in 6.8.0-60.63.1
- linux-nvidia Fixed in 6.8.0-1028.31
- linux-nvidia-6.11 Fixed in 6.11.0-1007.7
- linux-nvidia-lowlatency Fixed in 6.8.0-1028.31.1
- linux-nvidia-tegra Fixed in 6.8.0-1008.8
- linux-oem-6.11 Fixed in 6.11.0-1017.17
- linux-oem-6.8 Fixed in 6.8.0-1028.28
- linux-oracle Fixed in 6.8.0-1026.27
- linux-raspi Fixed in 6.8.0-1028.32
- linux-raspi-realtime No fix yet
- linux-realtime No fix yet
- linux-riscv Fixed in 6.8.0-60.63.1
- linux-xilinx Fixed in 6.8.0-1017.18
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 24.04 LTS
- linux-fips Fixed in 6.8.0-78.78+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro Realtime 22.04 LTS
- linux-realtime-6.8 Fixed in 6.8.1-1022.23~22.04.1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro Realtime 24.04 LTS
- linux-raspi-realtime Fixed in 6.8.0-2023.24Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-realtime Fixed in 6.8.1-1022.23Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.