Description
There exists a use-after-free in io_uring in the Linux kernel. Signalfd_poll() and binder_poll() use a waitqueue whose lifetime is the current task. It will send a POLLFREE notification to all waiters before the queue is freed. Unfortunately, the io_uring poll doesn't handle POLLFREE. This allows a use-after-free to occur if a signalfd or binder fd is polled with io_uring poll, and the waitqueue gets freed. We recommend upgrading past commit fc78b2fc21f10c4c9c4d5d659a685710ffa63659
Details
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| linux | — | 5.15.0-50.56 |
| linux-aws | — | 5.15.0-1021.25 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.15 | — | 5.15.0-1021.25~20.04.1 |
| linux-aws-5.3 | — | — |
| linux-aws-5.4 | — | 5.4.0-1086.93~18.04.1 |
| linux-aws-5.8 | — | — |
| linux-aws-fips | — | — |
| linux-azure | — | 5.15.0-1021.26 |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.15 | — | 5.15.0-1021.26~20.04.1 |
| linux-azure-5.3 | — | — |
| linux-azure-5.4 | — | 5.4.0-1094.100~18.04.1 |
| linux-azure-5.8 | — | — |
| linux-azure-edge | — | — |
| linux-azure-fde | — | 5.15.0-1024.30.1 |
| linux-azure-fips | — | — |
| linux-bluefield | — | — |
| linux-fips | — | — |
| linux-gcp | — | 5.15.0-1019.25 |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.15 | — | 5.15.0-1021.28~20.04.1 |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.4 | — | 5.4.0-1092.101~18.04.1 |
| linux-gcp-5.8 | — | — |
| linux-gcp-fips | — | — |
| linux-gke | — | 5.15.0-1017.20 |
| linux-gke-4.15 | — | — |
| linux-gke-5.15 | — | 5.15.0-1019.23~20.04.1 |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 5.15.0-1004.6 |
| linux-gkeop-5.15 | — | 5.15.0-1005.7~20.04.1 |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.15 | — | 5.15.0-50.56~20.04.1 |
| linux-hwe-5.4 | — | 5.4.0-128.144~18.04.1 |
| linux-hwe-5.8 | — | — |
| linux-hwe-edge | — | — |
| linux-ibm | — | 5.15.0-1015.17 |
| linux-ibm-5.4 | — | 5.4.0-1034.38~18.04.1 |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | — |
| linux-intel-iotg | — | 5.15.0-1017.22 |
| linux-intel-iotg-5.15 | — | 5.15.0-1017.22~20.04.1 |
| linux-iot | — | 5.4.0-1005.7 |
| linux-kvm | — | 5.15.0-1019.23 |
| linux-lowlatency | — | 5.15.0-50.56 |
| linux-lowlatency-hwe-5.15 | — | 5.15.0-50.56~20.04.1 |
| linux-nvidia | — | 5.15.0-1015.15 |
| linux-oem | — | — |
| linux-oem-5.10 | — | — |
| linux-oem-5.13 | — | — |
| linux-oem-5.14 | — | — |
| linux-oem-5.6 | — | — |
| linux-oracle | — | 5.15.0-1019.24 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.15 | — | 5.15.0-1019.24~20.04.1 |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.4 | — | 5.4.0-1084.92~18.04.1 |
| linux-oracle-5.8 | — | — |
| linux-raspi | — | 5.15.0-1016.18 |
| linux-raspi-5.4 | — | 5.4.0-1071.81~18.04.1 |
| linux-raspi-realtime | — | — |
| linux-raspi2 | — | — |
| linux-realtime | — | 5.15.0-1022.22 |
| linux-riscv | — | 5.15.0-1020.23 |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.15 | — | 5.15.0-1022.26~20.04.1 |
| linux-riscv-5.8 | — | — |
References
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