Description
In the Linux kernel, the following vulnerability has been resolved: epoll: be better about file lifetimes epoll can call out to vfs_poll() with a file pointer that may race with the last 'fput()'. That would make f_count go down to zero, and while the ep->mtx locking means that the resulting file pointer tear-down will be blocked until the poll returns, it means that f_count is already dead, and any use of it won't actually get a reference to the file any more: it's dead regardless. Make sure we have a valid ref on the file pointer before we call down to vfs_poll() from the epoll routines.
Details
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| linux | — | 6.8.0-40.40 |
| linux-allwinner-5.19 | — | — |
| linux-aws | — | 6.8.0-1013.14 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.15 | — | 5.15.0-1069.75~20.04.1 |
| linux-aws-5.19 | — | — |
| linux-aws-5.3 | — | — |
| linux-aws-5.4 | — | — |
| linux-aws-5.8 | — | — |
| linux-aws-6.2 | — | — |
| linux-aws-6.5 | — | — |
| linux-aws-6.8 | — | 6.8.0-1013.14~22.04.1 |
| linux-aws-fips | — | 5.15.0-1069.75+fips1 |
| linux-aws-hwe | — | — |
| linux-azure | — | 6.8.0-1012.14 |
| linux-azure-4.15 | — | — |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.15 | — | 5.15.0-1072.81~20.04.1 |
| linux-azure-5.19 | — | — |
| linux-azure-5.3 | — | — |
| linux-azure-5.4 | — | — |
| linux-azure-5.8 | — | — |
| linux-azure-6.2 | — | — |
| linux-azure-6.5 | — | — |
| linux-azure-6.8 | — | 6.8.0-1012.14~22.04.1 |
| linux-azure-edge | — | — |
| linux-azure-fde | — | 5.15.0-1072.81.1 |
| linux-azure-fde-5.15 | — | — |
| linux-azure-fde-5.19 | — | — |
| linux-azure-fde-6.2 | — | — |
| linux-azure-fips | — | 5.15.0-1072.81+fips1 |
| linux-bluefield | — | — |
| linux-fips | — | 6.8.0-78.78+fips1 |
| linux-gcp | — | 6.8.0-1012.13 |
| linux-gcp-4.15 | — | — |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.15 | — | 5.15.0-1068.76~20.04.1 |
| linux-gcp-5.19 | — | — |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.4 | — | — |
| linux-gcp-5.8 | — | — |
| linux-gcp-6.2 | — | — |
| linux-gcp-6.5 | — | — |
| linux-gcp-6.8 | — | 6.8.0-1012.13~22.04.1 |
| linux-gcp-fips | — | 5.15.0-1068.76+fips1 |
| linux-gke | — | 6.8.0-1008.11 |
| linux-gke-4.15 | — | — |
| linux-gke-5.15 | — | — |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 5.15.0-1052.59 |
| linux-gkeop-5.15 | — | 5.15.0-1052.59~20.04.1 |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.15 | — | 5.15.0-121.131~20.04.1 |
| linux-hwe-5.19 | — | — |
| linux-hwe-5.4 | — | — |
| linux-hwe-5.8 | — | — |
| linux-hwe-6.2 | — | — |
| linux-hwe-6.5 | — | — |
| linux-hwe-6.8 | — | 6.8.0-40.40~22.04.3 |
| linux-hwe-edge | — | — |
| linux-ibm | — | 6.8.0-1010.10 |
| linux-ibm-5.15 | — | 5.15.0-1062.65~20.04.1 |
| linux-ibm-5.4 | — | — |
| linux-ibm-6.8 | — | 6.8.0-1010.10~22.04.1 |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | 5.15.0-1063.65 |
| linux-intel-iotg | — | 5.15.0-1064.70 |
| linux-intel-iotg-5.15 | — | 5.15.0-1064.70~20.04.1 |
| linux-iot | — | — |
| linux-kvm | — | 5.15.0-1066.71 |
| linux-lowlatency | — | 6.8.0-40.40.1 |
| linux-lowlatency-hwe-5.15 | — | 5.15.0-121.131~20.04.1 |
| linux-lowlatency-hwe-5.19 | — | — |
| linux-lowlatency-hwe-6.2 | — | — |
| linux-lowlatency-hwe-6.5 | — | — |
| linux-lowlatency-hwe-6.8 | — | 6.8.0-40.40.1~22.04.1 |
| linux-lts-xenial | — | — |
| linux-nvidia | — | 6.8.0-1011.11 |
| linux-nvidia-6.2 | — | — |
| linux-nvidia-6.5 | — | — |
| linux-nvidia-6.8 | — | 6.8.0-1011.11~22.04.1 |
| linux-nvidia-lowlatency | — | 6.8.0-1011.11.1 |
| linux-nvidia-tegra | — | 5.15.0-1028.28 |
| linux-nvidia-tegra-5.15 | — | 5.15.0-1030.30~20.04.1 |
| linux-nvidia-tegra-igx | — | 5.15.0-1016.16 |
| linux-oem | — | — |
| linux-oem-5.10 | — | — |
| linux-oem-5.13 | — | — |
| linux-oem-5.14 | — | — |
| linux-oem-5.17 | — | — |
| linux-oem-5.6 | — | — |
| linux-oem-6.0 | — | — |
| linux-oem-6.1 | — | — |
| linux-oem-6.5 | — | — |
| linux-oem-6.8 | — | 6.8.0-1010.10 |
| linux-oracle | — | 6.8.0-1010.10 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.15 | — | 5.15.0-1067.73~20.04.1 |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.4 | — | — |
| linux-oracle-5.8 | — | — |
| linux-oracle-6.5 | — | — |
| linux-oracle-6.8 | — | 6.8.0-1010.10~22.04.1 |
| linux-raspi | — | 6.8.0-1009.10 |
| linux-raspi-5.4 | — | — |
| linux-raspi-realtime | — | 6.8.0-2008.8 |
| linux-raspi2 | — | — |
| linux-realtime | — | 6.8.1-1006.6 |
| linux-realtime-6.8 | — | 6.8.1-1006.6~22.04.1 |
| linux-riscv | — | 6.8.0-40.40.1 |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.15 | — | 5.15.0-1065.69~20.04.1 |
| linux-riscv-5.19 | — | — |
| linux-riscv-5.8 | — | — |
| linux-riscv-6.5 | — | — |
| linux-riscv-6.8 | — | 6.8.0-40.40.1~22.04.1 |
| linux-starfive-5.19 | — | — |
| linux-starfive-6.2 | — | — |
| linux-starfive-6.5 | — | — |
| linux-xilinx-zynqmp | — | 5.15.0-1035.39 |
References
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