🛡️ CVE-2026-46300 on Ubuntu — linux
Description
In the Linux kernel, the following vulnerability has been resolved: net: skbuff: preserve shared-frag marker during coalescing skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain the same externally-owned or page-cache-backed frags, but the shared-frag marker is currently lost. That breaks the invariant relied on by later in-place writers. In particular, ESP input checks skb_has_shared_frag() before deciding whether an uncloned nonlinear skb can skip skb_cow_data(). If TCP receive coalescing has moved shared frags into an unmarked skb, ESP can see skb_has_shared_frag() as false and decrypt in place over page-cache backed frags. Propagate SKBFL_SHARED_FRAG when skb_try_coalesce() transfers paged frags. The tailroom copy path does not need the marker because it copies bytes into @to's linear data rather than transferring frag descriptors.
Distribution advisory
This page covers CVE-2026-46300 as tracked by Ubuntu, for the package linux. The fix is available in version 7.0.0-22.22; 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 high, integrity high, availability high.
Affected software and timeline
Affected software: linux (fixed in 7.0.0-22.22), linux-allwinner-5.19, linux-aws (fixed in 7.0.0-1006.6), linux-aws-5.0, linux-aws-5.11, linux-aws-5.13, linux-aws-5.15 (fixed in 5.15.0-1109.116~20.04.1), linux-aws-5.19, linux-aws-5.3, linux-aws-5.4, linux-aws-5.8, linux-aws-6.14, linux-aws-6.17 (fixed in 6.17.0-1017.17~24.04.1), linux-aws-6.2, linux-aws-6.5, linux-aws-6.8 (fixed in 6.8.0-1057.60~22.04.1), linux-aws-fips (fixed in 6.8.0-1057.60+fips1), linux-aws-hwe, linux-azure, linux-azure-4.15, linux-azure-5.11, linux-azure-5.13, linux-azure-5.15 (fixed in 5.15.0-1114.123~20.04.1), linux-azure-5.19, linux-azure-5.3, linux-azure-5.4, linux-azure-5.8, linux-azure-6.11, linux-azure-6.14, linux-azure-6.17 (fixed in 6.17.0-1017.17~24.04.1), linux-azure-6.2, linux-azure-6.5, linux-azure-6.8, linux-azure-edge, linux-azure-fde, linux-azure-fde-5.15, 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, linux-azure-fips (fixed in 6.8.0-1059.65+fips1), linux-azure-nvidia, linux-azure-nvidia-6.14, linux-bluefield, linux-fips (fixed in 6.8.0-124.124+fips1), linux-gcp (fixed in 7.0.0-1005.5), linux-gcp-4.15, linux-gcp-5.11, linux-gcp-5.13, linux-gcp-5.15 (fixed in 5.15.0-1109.118~20.04.1), linux-gcp-5.19, linux-gcp-5.3, linux-gcp-5.4, linux-gcp-5.8, linux-gcp-6.11, linux-gcp-6.14, linux-gcp-6.17 (fixed in 6.17.0-1018.19~24.04.1), linux-gcp-6.2, linux-gcp-6.5, linux-gcp-6.8 (fixed in 6.8.0-1060.63~22.04.1), linux-gcp-fips (fixed in 6.8.0-1060.63+fips1), linux-gke (fixed in 6.8.0-1055.61), linux-gke-4.15, linux-gke-5.15, linux-gke-5.4, linux-gkeop (fixed in 6.8.0-1042.45), linux-gkeop-5.15, linux-gkeop-5.4, linux-hwe, linux-hwe-5.11, linux-hwe-5.13, linux-hwe-5.15 (fixed in 5.15.0-181.191~20.04.1), linux-hwe-5.19, linux-hwe-5.4, linux-hwe-5.8, linux-hwe-6.11, linux-hwe-6.14, linux-hwe-6.17 (fixed in 6.17.0-35.35~24.04.1), linux-hwe-6.2, linux-hwe-6.5, linux-hwe-6.8 (fixed in 6.8.0-124.124~22.04.1), linux-hwe-edge, linux-ibm (fixed in 7.0.0-1007.7), linux-ibm-5.15 (fixed in 5.15.0-1103.106~20.04.1), linux-ibm-5.4, linux-ibm-6.8 (fixed in 6.8.0-1057.58~22.04.1), linux-intel-5.13, linux-intel-iot-realtime (fixed in 5.15.0-1101.103), linux-intel-iotg (fixed in 5.15.0-1104.110), linux-intel-iotg-5.15, linux-iot, linux-kvm (fixed in 5.15.0-1101.106), linux-lowlatency, linux-lowlatency-hwe-5.15, 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, linux-lts-xenial, linux-nvidia (fixed in 7.0.0-1009.9), linux-nvidia-6.11, linux-nvidia-6.17 (fixed in 6.17.0-1021.21), linux-nvidia-6.2, linux-nvidia-6.5, linux-nvidia-6.8 (fixed in 6.8.0-1055.58~22.04.1), linux-nvidia-lowlatency (fixed in 6.8.0-1055.58.1), linux-nvidia-tegra (fixed in 6.8.0-1026.26), linux-nvidia-tegra-5.15 (fixed in 5.15.0-1061.61~20.04.1), linux-nvidia-tegra-igx (fixed in 5.15.0-1050.50), 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 (fixed in 6.17.0-1024.24), linux-oem-6.5, linux-oem-6.8, linux-oracle (fixed in 7.0.0-1005.5), linux-oracle-5.0, linux-oracle-5.11, linux-oracle-5.13, linux-oracle-5.15, linux-oracle-5.3, linux-oracle-5.4, linux-oracle-5.8, linux-oracle-6.14, linux-oracle-6.17 (fixed in 6.17.0-1016.16~24.04.1), linux-oracle-6.5, linux-oracle-6.8 (fixed in 6.8.0-1054.55~22.04.1), linux-raspi (fixed in 7.0.0-1011.11), linux-raspi-5.4, linux-raspi-realtime (fixed in 6.8.0-2046.47), linux-raspi2, linux-realtime (fixed in 7.0.0-22.22.1), linux-realtime-6.14, linux-realtime-6.17 (fixed in 6.17.0-1014.16~24.04.1), linux-realtime-6.8 (fixed in 6.8.1-1052.53~22.04.1), linux-riscv (fixed in 7.0.0-22.22.1), linux-riscv-5.11, linux-riscv-5.15 (fixed in 5.15.0-1103.107~20.04.1), linux-riscv-5.19, linux-riscv-5.8, linux-riscv-6.14, linux-riscv-6.17 (fixed in 6.17.0-35.35.1~24.04.1), linux-riscv-6.5, linux-riscv-6.8 (fixed in 6.8.0-124.124~22.04.1), linux-starfive-5.19, linux-starfive-6.2, linux-starfive-6.5, linux-xilinx and linux-xilinx-zynqmp. Published on 23 May 2026 and last revised on 12 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
CVE-2026-46300 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:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| linux | — | 7.0.0-22.22 |
| linux-allwinner-5.19 | — | — |
| linux-aws | — | 7.0.0-1006.6 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.15 | — | 5.15.0-1109.116~20.04.1 |
| linux-aws-5.19 | — | — |
| linux-aws-5.3 | — | — |
| linux-aws-5.4 | — | — |
| linux-aws-5.8 | — | — |
| linux-aws-6.14 | — | — |
| linux-aws-6.17 | — | 6.17.0-1017.17~24.04.1 |
| linux-aws-6.2 | — | — |
| linux-aws-6.5 | — | — |
| linux-aws-6.8 | — | 6.8.0-1057.60~22.04.1 |
| linux-aws-fips | — | 6.8.0-1057.60+fips1 |
| linux-aws-hwe | — | — |
| linux-azure | — | — |
| linux-azure-4.15 | — | — |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.15 | — | 5.15.0-1114.123~20.04.1 |
| linux-azure-5.19 | — | — |
| linux-azure-5.3 | — | — |
| linux-azure-5.4 | — | — |
| linux-azure-5.8 | — | — |
| linux-azure-6.11 | — | — |
| linux-azure-6.14 | — | — |
| linux-azure-6.17 | — | 6.17.0-1017.17~24.04.1 |
| linux-azure-6.2 | — | — |
| linux-azure-6.5 | — | — |
| linux-azure-6.8 | — | — |
| linux-azure-edge | — | — |
| linux-azure-fde | — | — |
| linux-azure-fde-5.15 | — | — |
| 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 | — | — |
| linux-azure-fips | — | 6.8.0-1059.65+fips1 |
| linux-azure-nvidia | — | — |
| linux-azure-nvidia-6.14 | — | — |
| linux-bluefield | — | — |
| linux-fips | — | 6.8.0-124.124+fips1 |
| linux-gcp | — | 7.0.0-1005.5 |
| linux-gcp-4.15 | — | — |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.15 | — | 5.15.0-1109.118~20.04.1 |
| linux-gcp-5.19 | — | — |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.4 | — | — |
| linux-gcp-5.8 | — | — |
| linux-gcp-6.11 | — | — |
| linux-gcp-6.14 | — | — |
| linux-gcp-6.17 | — | 6.17.0-1018.19~24.04.1 |
| linux-gcp-6.2 | — | — |
| linux-gcp-6.5 | — | — |
| linux-gcp-6.8 | — | 6.8.0-1060.63~22.04.1 |
| linux-gcp-fips | — | 6.8.0-1060.63+fips1 |
| linux-gke | — | 6.8.0-1055.61 |
| linux-gke-4.15 | — | — |
| linux-gke-5.15 | — | — |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 6.8.0-1042.45 |
| linux-gkeop-5.15 | — | — |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.15 | — | 5.15.0-181.191~20.04.1 |
| linux-hwe-5.19 | — | — |
| linux-hwe-5.4 | — | — |
| linux-hwe-5.8 | — | — |
| linux-hwe-6.11 | — | — |
| linux-hwe-6.14 | — | — |
| linux-hwe-6.17 | — | 6.17.0-35.35~24.04.1 |
| linux-hwe-6.2 | — | — |
| linux-hwe-6.5 | — | — |
| linux-hwe-6.8 | — | 6.8.0-124.124~22.04.1 |
| linux-hwe-edge | — | — |
| linux-ibm | — | 7.0.0-1007.7 |
| linux-ibm-5.15 | — | 5.15.0-1103.106~20.04.1 |
| linux-ibm-5.4 | — | — |
| linux-ibm-6.8 | — | 6.8.0-1057.58~22.04.1 |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | 5.15.0-1101.103 |
| linux-intel-iotg | — | 5.15.0-1104.110 |
| linux-intel-iotg-5.15 | — | — |
| linux-iot | — | — |
| linux-kvm | — | 5.15.0-1101.106 |
| linux-lowlatency | — | — |
| linux-lowlatency-hwe-5.15 | — | — |
| 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 | — | — |
| linux-lts-xenial | — | — |
| linux-nvidia | — | 7.0.0-1009.9 |
| linux-nvidia-6.11 | — | — |
| linux-nvidia-6.17 | — | 6.17.0-1021.21 |
| linux-nvidia-6.2 | — | — |
| linux-nvidia-6.5 | — | — |
| linux-nvidia-6.8 | — | 6.8.0-1055.58~22.04.1 |
| linux-nvidia-lowlatency | — | 6.8.0-1055.58.1 |
| linux-nvidia-tegra | — | 6.8.0-1026.26 |
| linux-nvidia-tegra-5.15 | — | 5.15.0-1061.61~20.04.1 |
| linux-nvidia-tegra-igx | — | 5.15.0-1050.50 |
| 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 | — | 6.17.0-1024.24 |
| linux-oem-6.5 | — | — |
| linux-oem-6.8 | — | — |
| linux-oracle | — | 7.0.0-1005.5 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.15 | — | — |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.4 | — | — |
| linux-oracle-5.8 | — | — |
| linux-oracle-6.14 | — | — |
| linux-oracle-6.17 | — | 6.17.0-1016.16~24.04.1 |
| linux-oracle-6.5 | — | — |
| linux-oracle-6.8 | — | 6.8.0-1054.55~22.04.1 |
| linux-raspi | — | 7.0.0-1011.11 |
| linux-raspi-5.4 | — | — |
| linux-raspi-realtime | — | 6.8.0-2046.47 |
| linux-raspi2 | — | — |
| linux-realtime | — | 7.0.0-22.22.1 |
| linux-realtime-6.14 | — | — |
| linux-realtime-6.17 | — | 6.17.0-1014.16~24.04.1 |
| linux-realtime-6.8 | — | 6.8.1-1052.53~22.04.1 |
| linux-riscv | — | 7.0.0-22.22.1 |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.15 | — | 5.15.0-1103.107~20.04.1 |
| linux-riscv-5.19 | — | — |
| linux-riscv-5.8 | — | — |
| linux-riscv-6.14 | — | — |
| linux-riscv-6.17 | — | 6.17.0-35.35.1~24.04.1 |
| linux-riscv-6.5 | — | — |
| linux-riscv-6.8 | — | 6.8.0-124.124~22.04.1 |
| linux-starfive-5.19 | — | — |
| linux-starfive-6.2 | — | — |
| linux-starfive-6.5 | — | — |
| linux-xilinx | — | — |
| linux-xilinx-zynqmp | — | — |
References
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