In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix KMSAN uninit-value in extent_info usage
KMSAN reported a use of uninitialized value in `__is_extent_mergeable()` and `__is_back_mergeable()` via the read extent tree path.
The root cause is that `get_read_extent_info()` only initializes three fields (`fofs`, `blk`, `len`) of `struct extent_info`, leaving the remaining fields uninitialized. This leads to undefined behavior when those fields are accessed later, especially during extent merging.
Fix it by zero-initializing the `extent_info` struct before population.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux-6.1Upgrade linux | Sep 8, 2025 | Sep 8, 2025 |
| Ubuntu | — | Upgrade linux-image-nvidia-tegraUpgrade linux-image-raspi-nolpaeUpgrade linux-image-6.8.0-1043-gke-64kUpgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-fipsUpgrade linux-image-oracle-64k-6.14Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-5.15.0-1094-oracleUpgrade linux-image-5.15.0-1097-aws-64kUpgrade linux-image-6.8.0-1046-azureUpgrade linux-image-6.8.0-1046-azure-fipsUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-oem-20.04dUpgrade linux-image-oracle-64kUpgrade linux-image-aws-64k-5.15Upgrade linux-image-ibm-classicUpgrade linux-image-oem-24.04aUpgrade linux-image-azure-fips-6.8Upgrade linux-image-6.8.0-1046-nvidia-lowlatency-64kUpgrade linux-image-5.15.0-1102-azureUpgrade linux-image-oem-22.04aUpgrade linux-image-5.15.0-1049-nvidia-tegraUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-6.8.1-1041-realtimeUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-nvidiaUpgrade linux-image-oem-22.04cUpgrade linux-image-oem-22.04Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-ibmUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-6.8.0-1046-nvidia-64kUpgrade linux-image-6.8.0-1047-gcp-fipsUpgrade linux-image-5.15.0-1093-gkeUpgrade linux-image-6.8.0-1051-azureUpgrade linux-image-6.8.0-1043-gkeUpgrade linux-image-5.15.0-1092-nvidiaUpgrade linux-image-fips-5.15Upgrade linux-image-realtime-hwe-22.04Upgrade linux-image-6.8.0-100-fipsUpgrade linux-image-6.8.0-1043-oracleUpgrade linux-image-6.14.0-1020-gcpUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-5.15.0-1101-azureUpgrade linux-image-5.15.0-163-lowlatency-64kUpgrade linux-image-6.14.0-1016-oemUpgrade linux-image-5.15.0-1091-ibmUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-5.15.0-1038-nvidia-tegra-igx-rtUpgrade linux-image-oem-22.04bUpgrade linux-image-5.15.0-1097-aws-fipsUpgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-5.15.0-1097-gcp-fipsUpgrade linux-image-6.8.0-1023-xilinxUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-100-generic-64kUpgrade linux-image-aws-lts-22.04Upgrade linux-image-virtualUpgrade linux-image-generic-64kUpgrade linux-image-gcpUpgrade linux-image-oem-6.14Upgrade linux-image-raspi-realtimeUpgrade linux-image-generic-64k-6.8Upgrade linux-image-5.15.0-163-fipsUpgrade linux-image-5.15.0-163-generic-lpaeUpgrade linux-image-5.15.0-1092-nvidia-lowlatencyUpgrade linux-image-6.8.0-1043-oracle-64kUpgrade linux-image-5.15.0-1080-gkeopUpgrade linux-image-5.15.0-1091-raspiUpgrade linux-image-aws-64k-6.8Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-genericUpgrade linux-image-generic-lpaeUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-gke-5.15Upgrade linux-image-6.14.0-1017-aws-64kUpgrade linux-image-6.14.0-1017-oracleUpgrade linux-image-6.14.0-36-generic-64kUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-lowlatencyUpgrade linux-image-lowlatency-64kUpgrade linux-image-kvm-5.15Upgrade linux-image-5.15.0-1089-intel-iot-realtimeUpgrade linux-image-azure-lts-24.04Upgrade linux-image-aws-6.8Upgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-6.8.0-1046-aws-fipsUpgrade linux-image-5.15.0-1096-realtimeUpgrade linux-image-5.15.0-1097-gcpUpgrade linux-image-5.15.0-1089-kvmUpgrade linux-image-generic-6.8Upgrade linux-image-ibm-6.8Upgrade linux-image-azure-lts-22.04Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-azure-fipsUpgrade linux-image-5.15.0-1049-nvidia-tegra-rtUpgrade linux-image-6.8.0-1046-aws-64kUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-oem-20.04bUpgrade linux-image-gkeopUpgrade linux-image-6.8.0-100-genericUpgrade linux-image-xilinxUpgrade linux-image-6.8.0-100-lowlatency-64kUpgrade linux-image-fips-6.8Upgrade linux-image-gkeop-6.8Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-gcp-6.8Upgrade linux-image-generic-hwe-20.04Upgrade linux-image-realtime-5.15Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-gke-64k-6.8Upgrade linux-image-generic-6.14Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-lowlatency-5.15Upgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-oracle-6.8Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-aws-5.15Upgrade linux-image-gkeUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-kvmUpgrade linux-image-aws-6.14Upgrade linux-image-generic-64k-6.14Upgrade linux-image-6.8.0-100-lowlatencyUpgrade linux-image-virtual-6.8Upgrade linux-image-6.8.0-1047-gcp-64kUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-5.15.0-163-lowlatencyUpgrade linux-image-oracle-5.15Upgrade linux-image-nvidia-6.8Upgrade linux-image-aws-fipsUpgrade linux-image-gcp-6.14Upgrade linux-image-azure-6.14Upgrade linux-image-6.8.0-1047-raspiUpgrade linux-image-6.14.0-1016-realtimeUpgrade linux-image-raspiUpgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-generic-lpae-5.15Upgrade linux-image-aws-64k-6.14Upgrade linux-image-nvidia-64kUpgrade linux-image-gkeop-5.15Upgrade linux-image-gcp-5.15Upgrade linux-image-azure-5.15Upgrade linux-image-aws-lts-24.04Upgrade linux-image-aws-fips-5.15Upgrade linux-image-6.8.0-1046-nvidia-lowlatencyUpgrade linux-image-5.15.0-163-genericUpgrade linux-image-5.15.0-1092-intel-iotgUpgrade linux-image-5.15.0-1061-xilinx-zynqmpUpgrade linux-image-virtual-5.15Upgrade linux-image-oracle-6.14Upgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-ibm-5.15Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-intelUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-gcp-fips-5.15Upgrade linux-image-gcp-64kUpgrade linux-image-6.8.0-1046-awsUpgrade linux-image-6.14.0-36-genericUpgrade linux-image-6.14.0-1020-gcp-64kUpgrade linux-image-6.14.0-1017-oracle-64kUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-virtual-6.14Upgrade linux-image-nvidia-tegra-igxUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-6.14.0-1018-raspiUpgrade linux-image-oracleUpgrade linux-image-oem-24.04Upgrade linux-image-oem-22.04dUpgrade linux-image-oem-20.04cUpgrade linux-image-lowlatency-6.8Upgrade linux-image-intel-iotgUpgrade linux-image-generic-5.15Upgrade linux-image-azureUpgrade linux-image-aws-64kUpgrade linux-image-6.8.0-1030-gkeopUpgrade linux-image-5.15.0-1101-azure-fipsUpgrade linux-image-5.15.0-1038-nvidia-tegra-igxUpgrade linux-image-xilinx-6.8Upgrade linux-image-realtime-6.14Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-nvidia-5.15Upgrade linux-image-gke-64kUpgrade linux-image-gke-6.8Upgrade linux-image-generic-64k-5.15Upgrade linux-image-6.8.0-1046-nvidiaUpgrade linux-image-6.14.0-1017-awsUpgrade linux-image-oem-20.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-gcp-64k-6.14Upgrade linux-image-awsUpgrade linux-image-6.8.0-2037-raspi-realtimeUpgrade linux-image-azure-6.8Upgrade linux-image-6.8.0-1044-ibmUpgrade linux-image-5.15.0-1097-awsUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-azure-fips-5.15Upgrade linux-image-raspi-6.8Upgrade linux-image-intel-iotg-5.15Upgrade linux-image-raspi-5.15Upgrade linux-image-azure-cvmUpgrade linux-image-raspi-6.14Upgrade linux-image-6.14.0-1017-azureUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-realtimeUpgrade linux-image-gcp-fipsUpgrade linux-image-aws-fips-6.8Upgrade linux-image-6.8.0-1047-gcpUpgrade linux-image-5.15.0-163-generic-64kUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-realtime-6.8.1 | Nov 25, 2025 | Nov 21, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 7, 2025 | Aug 19, 2025 |
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