🛡️ CVE-2022-48961 on Ubuntu — linux
Description
In the Linux kernel, the following vulnerability has been resolved: net: mdio: fix unbalanced fwnode reference count in mdio_device_release() There is warning report about of_node refcount leak while probing mdio device: OF: ERROR: memory leak, expected refcount 1 instead of 2, of_node_get()/of_node_put() unbalanced - destroy cset entry: attach overlay node /spi/soc@0/mdio@710700c0/ethernet@4 In of_mdiobus_register_device(), we increase fwnode refcount by fwnode_handle_get() before associating the of_node with mdio device, but it has never been decreased in normal path. Since that, in mdio_device_release(), it needs to call fwnode_handle_put() in addition instead of calling kfree() directly. After above, just calling mdio_device_free() in the error handle path of of_mdiobus_register_device() is enough to keep the refcount balanced.
Distribution advisory
This page covers CVE-2022-48961 as tracked by Ubuntu, for the package linux. The fix is available in version 5.15.0-67.74; earlier versions remain affected.
How this vulnerability can be exploited
This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.
Affected software and timeline
Affected software: linux (fixed in 5.15.0-67.74), linux-allwinner-5.19, linux-aws (fixed in 5.15.0-1031.35), linux-aws-5.0, linux-aws-5.11, linux-aws-5.13, linux-aws-5.15 (fixed in 5.15.0-1031.35~20.04.1), 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-fips, linux-aws-hwe, linux-azure (fixed in 5.15.0-1034.41), linux-azure-4.15, linux-azure-5.11, linux-azure-5.13, linux-azure-5.15 (fixed in 5.15.0-1034.41~20.04.1), 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-edge, linux-azure-fde (fixed in 5.15.0-1034.41.1), linux-azure-fde-5.19, linux-azure-fde-6.2, linux-azure-fips, linux-bluefield, linux-fips, linux-gcp (fixed in 5.15.0-1030.37), linux-gcp-4.15, linux-gcp-5.11, linux-gcp-5.13, linux-gcp-5.15 (fixed in 5.15.0-1030.37~20.04.1), 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-fips, linux-gke (fixed in 5.15.0-1028.33), linux-gke-4.15, linux-gke-5.15, linux-gke-5.4, linux-gkeop (fixed in 5.15.0-1016.21), linux-gkeop-5.15 (fixed in 5.15.0-1016.21~20.04.1), linux-gkeop-5.4, linux-hwe, linux-hwe-5.11, linux-hwe-5.13, linux-hwe-5.15 (fixed in 5.15.0-67.74~20.04.1), linux-hwe-5.19, linux-hwe-5.4, linux-hwe-5.8, linux-hwe-6.2, linux-hwe-6.5, linux-hwe-edge, linux-ibm (fixed in 5.15.0-1026.29), linux-ibm-5.4, linux-intel-5.13, linux-intel-iot-realtime (fixed in 5.15.0-1022.27), linux-intel-iotg (fixed in 5.15.0-1026.31), linux-intel-iotg-5.15 (fixed in 5.15.0-1026.31~20.04.1), linux-iot, linux-kvm (fixed in 5.15.0-1029.34), linux-lowlatency (fixed in 5.15.0-67.74), linux-lowlatency-hwe-5.15 (fixed in 5.15.0-67.74~20.04.1), linux-lowlatency-hwe-5.19, linux-lowlatency-hwe-6.2, linux-lowlatency-hwe-6.5, linux-nvidia (fixed in 5.15.0-1023.23), linux-nvidia-6.2, linux-nvidia-6.5, linux-nvidia-tegra-5.15 (fixed in 5.15.0-1014.14~20.04.1), 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-oracle (fixed in 5.15.0-1030.36), linux-oracle-5.0, linux-oracle-5.11, linux-oracle-5.13, linux-oracle-5.15 (fixed in 5.15.0-1030.36~20.04.1), linux-oracle-5.3, linux-oracle-5.4, linux-oracle-5.8, linux-oracle-6.5, linux-raspi (fixed in 5.15.0-1025.27), linux-raspi-5.4, linux-raspi-realtime, linux-raspi2, linux-realtime (fixed in 5.15.0-1033.36), linux-riscv, linux-riscv-5.11, linux-riscv-5.15 (fixed in 5.15.0-1030.34~20.04.1), linux-riscv-5.19, linux-riscv-5.8, linux-riscv-6.5, linux-starfive-5.19, linux-starfive-6.2, linux-starfive-6.5 and linux-xilinx-zynqmp. Published on 21 October 2024 and last revised on 28 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
ubuntu.com (Report)
www.cve.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
CVE-2022-48961 on other distributions
Each distribution ships its own build and its own fixed version. Pick the one you run:
Details
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| linux | — | 5.15.0-67.74 |
| linux-allwinner-5.19 | — | — |
| linux-aws | — | 5.15.0-1031.35 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.15 | — | 5.15.0-1031.35~20.04.1 |
| 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-fips | — | — |
| linux-aws-hwe | — | — |
| linux-azure | — | 5.15.0-1034.41 |
| linux-azure-4.15 | — | — |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.15 | — | 5.15.0-1034.41~20.04.1 |
| 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-edge | — | — |
| linux-azure-fde | — | 5.15.0-1034.41.1 |
| linux-azure-fde-5.19 | — | — |
| linux-azure-fde-6.2 | — | — |
| linux-azure-fips | — | — |
| linux-bluefield | — | — |
| linux-fips | — | — |
| linux-gcp | — | 5.15.0-1030.37 |
| linux-gcp-4.15 | — | — |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.15 | — | 5.15.0-1030.37~20.04.1 |
| 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-fips | — | — |
| linux-gke | — | 5.15.0-1028.33 |
| linux-gke-4.15 | — | — |
| linux-gke-5.15 | — | — |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 5.15.0-1016.21 |
| linux-gkeop-5.15 | — | 5.15.0-1016.21~20.04.1 |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.15 | — | 5.15.0-67.74~20.04.1 |
| linux-hwe-5.19 | — | — |
| linux-hwe-5.4 | — | — |
| linux-hwe-5.8 | — | — |
| linux-hwe-6.2 | — | — |
| linux-hwe-6.5 | — | — |
| linux-hwe-edge | — | — |
| linux-ibm | — | 5.15.0-1026.29 |
| linux-ibm-5.4 | — | — |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | 5.15.0-1022.27 |
| linux-intel-iotg | — | 5.15.0-1026.31 |
| linux-intel-iotg-5.15 | — | 5.15.0-1026.31~20.04.1 |
| linux-iot | — | — |
| linux-kvm | — | 5.15.0-1029.34 |
| linux-lowlatency | — | 5.15.0-67.74 |
| linux-lowlatency-hwe-5.15 | — | 5.15.0-67.74~20.04.1 |
| linux-lowlatency-hwe-5.19 | — | — |
| linux-lowlatency-hwe-6.2 | — | — |
| linux-lowlatency-hwe-6.5 | — | — |
| linux-nvidia | — | 5.15.0-1023.23 |
| linux-nvidia-6.2 | — | — |
| linux-nvidia-6.5 | — | — |
| linux-nvidia-tegra-5.15 | — | 5.15.0-1014.14~20.04.1 |
| 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-oracle | — | 5.15.0-1030.36 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.15 | — | 5.15.0-1030.36~20.04.1 |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.4 | — | — |
| linux-oracle-5.8 | — | — |
| linux-oracle-6.5 | — | — |
| linux-raspi | — | 5.15.0-1025.27 |
| linux-raspi-5.4 | — | — |
| linux-raspi-realtime | — | — |
| linux-raspi2 | — | — |
| linux-realtime | — | 5.15.0-1033.36 |
| linux-riscv | — | — |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.15 | — | 5.15.0-1030.34~20.04.1 |
| linux-riscv-5.19 | — | — |
| linux-riscv-5.8 | — | — |
| linux-riscv-6.5 | — | — |
| linux-starfive-5.19 | — | — |
| linux-starfive-6.2 | — | — |
| linux-starfive-6.5 | — | — |
| linux-xilinx-zynqmp | — | — |
References
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