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このページは Ubuntu 向けの修正状況です。脆弱性そのものの説明は CVE 本体のページにあります。 CVE-2026-81014 の詳細 →
カテゴリ
UBUNTU-CVE-2026-81014

In the Linux kernel, the following vulnerability has been resolved: platform/x86: hp-bioscfg: fix heap OOB read in sk_store() and kek_store() sk_store...

原文の説明

取得元が公開している説明をそのまま載せています (多くは英語)。

In the Linux kernel, the following vulnerability has been resolved: platform/x86: hp-bioscfg: fix heap OOB read in sk_store() and kek_store() sk_store() and kek_store() strip a trailing newline from the sysfs write before allocating the key buffer: length = count; if (buf[length - 1] == '\n') length--; bioscfg_drv.spm_data.signing_key = kmemdup(buf, length, GFP_KERNEL); but then pass the original "count" (not "length") as the copy size to hp_wmi_perform_query(), which memcpy()s that many bytes out of the "length"-sized allocation, reading one byte past it whenever the write ends in a newline, the normal case for a shell "echo" into sysfs. KASAN confirms this directly: BUG: KASAN: slab-out-of-bounds in hp_wmi_perform_query+0x1e9/0x460 [hp_bioscfg] Read of size 28 at addr ffff88813c8e2b80 by task python3/16022 ... sk_store+0xa7/0x240 [hp_bioscfg] kernfs_fop_write_iter+0x3e1/0x5d0 ... The buggy address is located 0 bytes inside of allocated 27-byte region [ffff88813c8e2b80, ffff88813c8e2b9b) Reproduced identically for kek_store, and at multiple write sizes (28, 57, 201 bytes), each time reading exactly one byte past a kmemdup() allocation one byte smaller than the write. Fix by passing "length" instead of "count" to hp_wmi_perform_query() in both functions.

出典: OSV.dev (Open Source Vulnerabilities) OSV

影響パッケージ

Ubuntu:16.04:LTS linux-hwe-edge
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Ubuntu:18.04:LTS linux-aws-5.0
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Ubuntu:18.04:LTS linux-aws-5.3
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Ubuntu:18.04:LTS linux-azure
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Ubuntu:18.04:LTS linux-azure-5.3
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Ubuntu:18.04:LTS linux-azure-edge
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Ubuntu:18.04:LTS linux-gcp
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Ubuntu:18.04:LTS linux-gcp-5.3
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Ubuntu:18.04:LTS linux-gke-4.15
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Ubuntu:18.04:LTS linux-gke-5.4
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Ubuntu:18.04:LTS linux-gkeop-5.4
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Ubuntu:18.04:LTS linux-hwe
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Ubuntu:18.04:LTS linux-hwe-edge
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Ubuntu:18.04:LTS linux-oem
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Ubuntu:18.04:LTS linux-oracle-5.0
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Ubuntu:18.04:LTS linux-oracle-5.3
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Ubuntu:20.04:LTS linux-aws-5.11
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Ubuntu:20.04:LTS linux-aws-5.13
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Ubuntu:20.04:LTS linux-aws-5.8
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Ubuntu:20.04:LTS linux-azure-5.11
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Ubuntu:20.04:LTS linux-azure-5.13
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Ubuntu:20.04:LTS linux-azure-5.8
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Ubuntu:20.04:LTS linux-azure-fde
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Ubuntu:20.04:LTS linux-gcp-5.11
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Ubuntu:20.04:LTS linux-gcp-5.13
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Ubuntu:20.04:LTS linux-gcp-5.8
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Ubuntu:20.04:LTS linux-gke
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Ubuntu:20.04:LTS linux-gke-5.15
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Ubuntu:20.04:LTS linux-gkeop
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Ubuntu:20.04:LTS linux-gkeop-5.15
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Ubuntu:20.04:LTS linux-hwe-5.11
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Ubuntu:20.04:LTS linux-hwe-5.13
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Ubuntu:20.04:LTS linux-hwe-5.8
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Ubuntu:20.04:LTS linux-intel-5.13
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Ubuntu:20.04:LTS linux-oem-5.10
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Ubuntu:20.04:LTS linux-oem-5.13
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Ubuntu:20.04:LTS linux-oem-5.14
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Ubuntu:20.04:LTS linux-oem-5.6
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Ubuntu:20.04:LTS linux-oracle-5.11
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Ubuntu:20.04:LTS linux-oracle-5.13
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Ubuntu:20.04:LTS linux-oracle-5.8
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Ubuntu:20.04:LTS linux-raspi2
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Ubuntu:20.04:LTS linux-riscv
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Ubuntu:20.04:LTS linux-riscv-5.11
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Ubuntu:20.04:LTS linux-riscv-5.8
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Ubuntu:22.04:LTS linux-allwinner-5.19
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Ubuntu:22.04:LTS linux-aws-5.19
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Ubuntu:22.04:LTS linux-aws-6.2
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Ubuntu:22.04:LTS linux-aws-6.5
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Ubuntu:22.04:LTS linux-aws-6.8
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Ubuntu:22.04:LTS linux-azure-5.19
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Ubuntu:22.04:LTS linux-azure-6.2
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Ubuntu:22.04:LTS linux-azure-6.5
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Ubuntu:22.04:LTS linux-azure-6.8
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Ubuntu:22.04:LTS linux-azure-fde-5.19
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Ubuntu:22.04:LTS linux-azure-fde-6.2
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Ubuntu:22.04:LTS linux-azure-fde-6.8
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Ubuntu:22.04:LTS linux-gcp-5.19
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Ubuntu:22.04:LTS linux-gcp-6.2
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Ubuntu:22.04:LTS linux-gcp-6.5
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Ubuntu:22.04:LTS linux-gcp-6.8
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Ubuntu:22.04:LTS linux-hwe-5.19
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Ubuntu:22.04:LTS linux-hwe-6.2
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Ubuntu:22.04:LTS linux-hwe-6.5
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Ubuntu:22.04:LTS linux-hwe-6.8
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Ubuntu:22.04:LTS linux-ibm-6.8
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Ubuntu:22.04:LTS linux-intel-iot-realtime
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Ubuntu:22.04:LTS linux-lowlatency-hwe-5.19
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Ubuntu:22.04:LTS linux-lowlatency-hwe-6.2
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Ubuntu:22.04:LTS linux-lowlatency-hwe-6.5
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Ubuntu:22.04:LTS linux-lowlatency-hwe-6.8
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Ubuntu:22.04:LTS linux-nvidia-6.2
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Ubuntu:22.04:LTS linux-nvidia-6.5
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Ubuntu:22.04:LTS linux-nvidia-6.8
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Ubuntu:22.04:LTS linux-oem-5.17
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Ubuntu:22.04:LTS linux-oem-6.0
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Ubuntu:22.04:LTS linux-oem-6.1
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Ubuntu:22.04:LTS linux-oem-6.5
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Ubuntu:22.04:LTS linux-oracle-6.5
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Ubuntu:22.04:LTS linux-oracle-6.8
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Ubuntu:22.04:LTS linux-realtime
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Ubuntu:22.04:LTS linux-riscv
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Ubuntu:22.04:LTS linux-riscv-5.19
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Ubuntu:22.04:LTS linux-riscv-6.5
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Ubuntu:22.04:LTS linux-riscv-6.8
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Ubuntu:22.04:LTS linux-starfive-5.19
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Ubuntu:22.04:LTS linux-starfive-6.2
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Ubuntu:22.04:LTS linux-starfive-6.5
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Ubuntu:Pro:Realtime:22.04:LTS linux-realtime-6.8
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Ubuntu:24.04:LTS linux
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Ubuntu:24.04:LTS linux-aws
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Ubuntu:24.04:LTS linux-aws-6.14
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Ubuntu:24.04:LTS linux-aws-6.17
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Ubuntu:24.04:LTS linux-aws-7.0
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Ubuntu:24.04:LTS linux-azure
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Ubuntu:24.04:LTS linux-azure-6.11
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Ubuntu:24.04:LTS linux-azure-6.14
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Ubuntu:24.04:LTS linux-azure-6.17
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Ubuntu:24.04:LTS linux-azure-7.0
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Ubuntu:24.04:LTS linux-azure-fde
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Ubuntu:24.04:LTS linux-azure-fde-6.14
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Ubuntu:24.04:LTS linux-azure-fde-6.17
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Ubuntu:24.04:LTS linux-azure-fde-7.0
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Ubuntu:24.04:LTS linux-azure-nvidia
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Ubuntu:24.04:LTS linux-azure-nvidia-6.14
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Ubuntu:24.04:LTS linux-gcp
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Ubuntu:24.04:LTS linux-gcp-6.11
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Ubuntu:24.04:LTS linux-gcp-6.14
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Ubuntu:24.04:LTS linux-gcp-6.17
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Ubuntu:24.04:LTS linux-gcp-7.0
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Ubuntu:24.04:LTS linux-gke
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Ubuntu:24.04:LTS linux-gkeop
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Ubuntu:24.04:LTS linux-hwe-6.11
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Ubuntu:24.04:LTS linux-hwe-6.14
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Ubuntu:24.04:LTS linux-hwe-6.17
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Ubuntu:24.04:LTS linux-hwe-7.0
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Ubuntu:24.04:LTS linux-ibm
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Ubuntu:24.04:LTS linux-lowlatency
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Ubuntu:24.04:LTS linux-lowlatency-hwe-6.11
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Ubuntu:24.04:LTS linux-nvidia
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Ubuntu:24.04:LTS linux-nvidia-6.11
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Ubuntu:24.04:LTS linux-nvidia-6.17
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Ubuntu:24.04:LTS linux-nvidia-7.0
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Ubuntu:24.04:LTS linux-nvidia-lowlatency
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Ubuntu:24.04:LTS linux-nvidia-tegra
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Ubuntu:24.04:LTS linux-oem-6.11
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Ubuntu:24.04:LTS linux-oem-6.14
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Ubuntu:24.04:LTS linux-oem-6.17
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Ubuntu:24.04:LTS linux-oem-6.8
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Ubuntu:24.04:LTS linux-oracle
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Ubuntu:24.04:LTS linux-oracle-6.14
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Ubuntu:24.04:LTS linux-oracle-6.17
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Ubuntu:24.04:LTS linux-oracle-7.0
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Ubuntu:24.04:LTS linux-raspi
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Ubuntu:24.04:LTS linux-raspi-realtime
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Ubuntu:24.04:LTS linux-realtime
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Ubuntu:24.04:LTS linux-riscv
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Ubuntu:24.04:LTS linux-riscv-6.14
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Ubuntu:24.04:LTS linux-riscv-6.17
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Ubuntu:24.04:LTS linux-riscv-7.0
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Ubuntu:24.04:LTS linux-vmware
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Ubuntu:24.04:LTS linux-xilinx
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Ubuntu:Nvidia-BlueField:24.04:LTS linux-bluefield
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Ubuntu:Pro:Realtime:24.04:LTS linux-raspi-realtime
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Ubuntu:Pro:Realtime:24.04:LTS linux-realtime
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Ubuntu:Pro:Realtime:24.04:LTS linux-realtime-6.14
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Ubuntu:Pro:Realtime:24.04:LTS linux-realtime-6.17
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Ubuntu:Pro:FIPS-updates:24.04:LTS linux-aws-fips
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Ubuntu:Pro:FIPS-updates:24.04:LTS linux-azure-fips
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Ubuntu:Pro:FIPS-updates:24.04:LTS linux-fips
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Ubuntu:Pro:FIPS-updates:24.04:LTS linux-gcp-fips
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Ubuntu:26.04:LTS linux
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Ubuntu:26.04:LTS linux-aws
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Ubuntu:26.04:LTS linux-azure
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Ubuntu:26.04:LTS linux-azure-fde
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Ubuntu:26.04:LTS linux-gcp
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Ubuntu:26.04:LTS linux-gke
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Ubuntu:26.04:LTS linux-ibm
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Ubuntu:26.04:LTS linux-nvidia
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Ubuntu:26.04:LTS linux-nvidia-bos
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Ubuntu:26.04:LTS linux-oem-7.0
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Ubuntu:26.04:LTS linux-oracle
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Ubuntu:26.04:LTS linux-raspi
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Ubuntu:26.04:LTS linux-realtime
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Ubuntu:26.04:LTS linux-riscv
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