🛡️ CVE-2026-46172 on Ubuntu — linux
Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: xfrm6: release dst on error in xfrm6_rcv_encap() xfrm6_rcv_encap() performs an IPv6 route lookup when the skb does not already have a dst attached. ip6_route_input_lookup() returns a referenced dst entry even when the lookup resolves to an error route. If dst->error is set, xfrm6_rcv_encap() drops the skb without attaching the dst to the skb and without releasing the reference returned by the lookup. Repeated packets hitting this path therefore leak dst entries. Release the dst before jumping to the drop path.
Distribution advisory
This page covers CVE-2026-46172 as tracked by Ubuntu, for the package linux. The fix is available in version 7.0.0-28.28; 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
UBUNTU-CVE-2026-46172 is recorded against 150 packages.
- linux (fixed in 7.0.0-28.28)
- linux-allwinner-5.19
- linux-aws (fixed in 7.0.0-1009.9)
- linux-aws-5.0
- linux-aws-5.11
- linux-aws-5.13
- linux-aws-5.15 (fixed in 5.15.0-1112.119~20.04.1)
- linux-aws-5.19
- linux-aws-5.3
- linux-aws-5.8
- linux-aws-6.14
- linux-aws-6.17
- linux-aws-6.2
- linux-aws-6.5
- linux-aws-6.8 (fixed in 6.8.0-1061.64~22.04.1)
- linux-aws-fips (fixed in 6.8.0-1061.64+fips1)
- linux-azure (fixed in 7.0.0-1010.10)
- linux-azure-5.11
- linux-azure-5.13
- linux-azure-5.15 (fixed in 5.15.0-1117.126~20.04.1)
- linux-azure-5.19
- linux-azure-5.3
- linux-azure-5.8
- linux-azure-6.11
Show the remaining 126 packages
- linux-azure-6.14
- linux-azure-6.17
- linux-azure-6.2
- linux-azure-6.5
- linux-azure-6.8 (fixed in 6.8.0-1063.71~22.04.1)
- linux-azure-edge
- linux-azure-fde (fixed in 7.0.0-1009.9)
- linux-azure-fde-5.15 (fixed in 5.15.0-1117.126~20.04.2)
- linux-azure-fde-5.19
- linux-azure-fde-6.14
- linux-azure-fde-6.17
- linux-azure-fde-6.2
- linux-azure-fde-6.8 (fixed in 6.8.0-1062.69~22.04.1)
- linux-azure-fips (fixed in 6.8.0-1063.71+fips2)
- linux-azure-nvidia
- linux-azure-nvidia-6.14
- linux-bluefield
- linux-fips (fixed in 6.8.0-136.136+fips2)
- linux-gcp (fixed in 7.0.0-1008.8)
- linux-gcp-5.11
- linux-gcp-5.13
- linux-gcp-5.15
- linux-gcp-5.19
- linux-gcp-5.3
- linux-gcp-5.8
- linux-gcp-6.11
- linux-gcp-6.14
- linux-gcp-6.17
- linux-gcp-6.2
- linux-gcp-6.5
- linux-gcp-6.8 (fixed in 6.8.0-1064.72~22.04.1)
- linux-gcp-fips (fixed in 6.8.0-1064.72+fips1)
- linux-gke (fixed in 7.0.0-1003.4)
- linux-gke-4.15
- linux-gke-5.15
- linux-gke-5.4
- linux-gkeop (fixed in 6.8.0-1046.50)
- linux-gkeop-5.15
- linux-gkeop-5.4
- linux-hwe
- linux-hwe-5.11
- linux-hwe-5.13
- linux-hwe-5.15 (fixed in 5.15.0-186.196~20.04.1)
- linux-hwe-5.19
- linux-hwe-5.8
- linux-hwe-6.11
- linux-hwe-6.14
- linux-hwe-6.17
- linux-hwe-6.2
- linux-hwe-6.5
- linux-hwe-6.8 (fixed in 6.8.0-136.136~22.04.1)
- linux-hwe-7.0 (fixed in 7.0.0-28.28~24.04.1)
- linux-hwe-edge
- linux-ibm (fixed in 7.0.0-1010.10)
- linux-ibm-5.15 (fixed in 5.15.0-1106.110~20.04.1)
- linux-ibm-6.8 (fixed in 6.8.0-1061.62~22.04.1)
- linux-intel-5.13
- linux-intel-iot-realtime (fixed in 5.15.0-1104.106)
- linux-intel-iotg (fixed in 5.15.0-1107.113)
- linux-intel-iotg-5.15 (fixed in 5.15.0-1107.113~20.04.1)
- linux-kvm (fixed in 5.15.0-1104.109)
- linux-lowlatency (fixed in 6.8.0-136.136.2)
- linux-lowlatency-hwe-5.15 (fixed in 5.15.0-184.194~20.04.1)
- linux-lowlatency-hwe-5.19
- linux-lowlatency-hwe-6.11
- linux-lowlatency-hwe-6.2
- linux-lowlatency-hwe-6.5
- linux-lowlatency-hwe-6.8 (fixed in 6.8.0-136.136.2~22.04.1)
- linux-nvidia
- linux-nvidia-6.11
- linux-nvidia-6.17
- linux-nvidia-6.2
- linux-nvidia-6.5
- linux-nvidia-6.8 (fixed in 6.8.0-1059.62~22.04.1)
- linux-nvidia-7.0
- linux-nvidia-bos
- linux-nvidia-lowlatency (fixed in 6.8.0-1059.62.1)
- linux-nvidia-tegra (fixed in 6.8.0-1030.31)
- linux-nvidia-tegra-5.15 (fixed in 5.15.0-1064.66~20.04.1)
- linux-nvidia-tegra-igx (fixed in 5.15.0-1053.53)
- 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-6.11
- linux-oem-6.14
- linux-oem-6.17
- linux-oem-6.5
- linux-oem-6.8
- linux-oem-7.0 (fixed in 7.0.0-1009.9)
- linux-oracle (fixed in 7.0.0-1008.8)
- linux-oracle-5.0
- linux-oracle-5.11
- linux-oracle-5.13
- linux-oracle-5.15 (fixed in 5.15.0-1109.115~20.04.1)
- linux-oracle-5.3
- linux-oracle-5.8
- linux-oracle-6.14
- linux-oracle-6.17
- linux-oracle-6.5
- linux-oracle-6.8 (fixed in 6.8.0-1058.61~22.04.1)
- linux-raspi (fixed in 7.0.0-1015.15)
- linux-raspi-realtime
- linux-raspi2
- linux-realtime (fixed in 7.0.0-28.28.1)
- linux-realtime-6.14
- linux-realtime-6.17
- linux-realtime-6.8 (fixed in 6.8.1-1056.57~22.04.2)
- linux-riscv (fixed in 7.0.0-28.28.1)
- linux-riscv-5.11
- linux-riscv-5.15 (fixed in 5.15.0-1106.110~20.04.1)
- linux-riscv-5.19
- linux-riscv-5.8
- linux-riscv-6.14
- linux-riscv-6.17
- linux-riscv-6.5
- linux-riscv-6.8 (fixed in 6.8.0-136.136~22.04.3)
- linux-starfive-5.19
- linux-starfive-6.2
- linux-starfive-6.5
- linux-xilinx (fixed in 6.8.0-1033.34)
- linux-xilinx-zynqmp (fixed in 5.15.0-1075.79)
Timeline and source
Published on 28 May 2026 and last revised on 11 August 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)
git.kernel.org (Report)
git.kernel.org (Report)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
CVE-2026-46172 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 | — | 7.0.0-28.28 |
| linux-allwinner-5.19 | — | — |
| linux-aws | — | 7.0.0-1009.9 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.15 | — | 5.15.0-1112.119~20.04.1 |
| linux-aws-5.19 | — | — |
| linux-aws-5.3 | — | — |
| linux-aws-5.8 | — | — |
| linux-aws-6.14 | — | — |
| linux-aws-6.17 | — | — |
| linux-aws-6.2 | — | — |
| linux-aws-6.5 | — | — |
| linux-aws-6.8 | — | 6.8.0-1061.64~22.04.1 |
| linux-aws-fips | — | 6.8.0-1061.64+fips1 |
| linux-azure | — | 7.0.0-1010.10 |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.15 | — | 5.15.0-1117.126~20.04.1 |
| linux-azure-5.19 | — | — |
| linux-azure-5.3 | — | — |
| linux-azure-5.8 | — | — |
| linux-azure-6.11 | — | — |
| linux-azure-6.14 | — | — |
| linux-azure-6.17 | — | — |
| linux-azure-6.2 | — | — |
| linux-azure-6.5 | — | — |
| linux-azure-6.8 | — | 6.8.0-1063.71~22.04.1 |
| linux-azure-edge | — | — |
| linux-azure-fde | — | 7.0.0-1009.9 |
| linux-azure-fde-5.15 | — | 5.15.0-1117.126~20.04.2 |
| linux-azure-fde-5.19 | — | — |
| linux-azure-fde-6.14 | — | — |
| linux-azure-fde-6.17 | — | — |
| linux-azure-fde-6.2 | — | — |
| linux-azure-fde-6.8 | — | 6.8.0-1062.69~22.04.1 |
| linux-azure-fips | — | 6.8.0-1063.71+fips2 |
| linux-azure-nvidia | — | — |
| linux-azure-nvidia-6.14 | — | — |
| linux-bluefield | — | — |
| linux-fips | — | 6.8.0-136.136+fips2 |
| linux-gcp | — | 7.0.0-1008.8 |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.15 | — | — |
| linux-gcp-5.19 | — | — |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.8 | — | — |
| linux-gcp-6.11 | — | — |
| linux-gcp-6.14 | — | — |
| linux-gcp-6.17 | — | — |
| linux-gcp-6.2 | — | — |
| linux-gcp-6.5 | — | — |
| linux-gcp-6.8 | — | 6.8.0-1064.72~22.04.1 |
| linux-gcp-fips | — | 6.8.0-1064.72+fips1 |
| linux-gke | — | 7.0.0-1003.4 |
| linux-gke-4.15 | — | — |
| linux-gke-5.15 | — | — |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 6.8.0-1046.50 |
| linux-gkeop-5.15 | — | — |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.15 | — | 5.15.0-186.196~20.04.1 |
| linux-hwe-5.19 | — | — |
| linux-hwe-5.8 | — | — |
| linux-hwe-6.11 | — | — |
| linux-hwe-6.14 | — | — |
| linux-hwe-6.17 | — | — |
| linux-hwe-6.2 | — | — |
| linux-hwe-6.5 | — | — |
| linux-hwe-6.8 | — | 6.8.0-136.136~22.04.1 |
| linux-hwe-7.0 | — | 7.0.0-28.28~24.04.1 |
| linux-hwe-edge | — | — |
| linux-ibm | — | 7.0.0-1010.10 |
| linux-ibm-5.15 | — | 5.15.0-1106.110~20.04.1 |
| linux-ibm-6.8 | — | 6.8.0-1061.62~22.04.1 |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | 5.15.0-1104.106 |
| linux-intel-iotg | — | 5.15.0-1107.113 |
| linux-intel-iotg-5.15 | — | 5.15.0-1107.113~20.04.1 |
| linux-kvm | — | 5.15.0-1104.109 |
| linux-lowlatency | — | 6.8.0-136.136.2 |
| linux-lowlatency-hwe-5.15 | — | 5.15.0-184.194~20.04.1 |
| linux-lowlatency-hwe-5.19 | — | — |
| linux-lowlatency-hwe-6.11 | — | — |
| linux-lowlatency-hwe-6.2 | — | — |
| linux-lowlatency-hwe-6.5 | — | — |
| linux-lowlatency-hwe-6.8 | — | 6.8.0-136.136.2~22.04.1 |
| linux-nvidia | — | — |
| linux-nvidia-6.11 | — | — |
| linux-nvidia-6.17 | — | — |
| linux-nvidia-6.2 | — | — |
| linux-nvidia-6.5 | — | — |
| linux-nvidia-6.8 | — | 6.8.0-1059.62~22.04.1 |
| linux-nvidia-7.0 | — | — |
| linux-nvidia-bos | — | — |
| linux-nvidia-lowlatency | — | 6.8.0-1059.62.1 |
| linux-nvidia-tegra | — | 6.8.0-1030.31 |
| linux-nvidia-tegra-5.15 | — | 5.15.0-1064.66~20.04.1 |
| linux-nvidia-tegra-igx | — | 5.15.0-1053.53 |
| 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-6.11 | — | — |
| linux-oem-6.14 | — | — |
| linux-oem-6.17 | — | — |
| linux-oem-6.5 | — | — |
| linux-oem-6.8 | — | — |
| linux-oem-7.0 | — | 7.0.0-1009.9 |
| linux-oracle | — | 7.0.0-1008.8 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.15 | — | 5.15.0-1109.115~20.04.1 |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.8 | — | — |
| linux-oracle-6.14 | — | — |
| linux-oracle-6.17 | — | — |
| linux-oracle-6.5 | — | — |
| linux-oracle-6.8 | — | 6.8.0-1058.61~22.04.1 |
| linux-raspi | — | 7.0.0-1015.15 |
| linux-raspi-realtime | — | — |
| linux-raspi2 | — | — |
| linux-realtime | — | 7.0.0-28.28.1 |
| linux-realtime-6.14 | — | — |
| linux-realtime-6.17 | — | — |
| linux-realtime-6.8 | — | 6.8.1-1056.57~22.04.2 |
| linux-riscv | — | 7.0.0-28.28.1 |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.15 | — | 5.15.0-1106.110~20.04.1 |
| linux-riscv-5.19 | — | — |
| linux-riscv-5.8 | — | — |
| linux-riscv-6.14 | — | — |
| linux-riscv-6.17 | — | — |
| linux-riscv-6.5 | — | — |
| linux-riscv-6.8 | — | 6.8.0-136.136~22.04.3 |
| linux-starfive-5.19 | — | — |
| linux-starfive-6.2 | — | — |
| linux-starfive-6.5 | — | — |
| linux-xilinx | — | 6.8.0-1033.34 |
| linux-xilinx-zynqmp | — | 5.15.0-1075.79 |
References
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