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-2026-53155 の詳細 →
UBUNTU-CVE-2026-53155
In the Linux kernel, the following vulnerability has been resolved: mm/huge_memory: use correct flags for device private PMD entry Commit 65edfda6f3f2...
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: mm/huge_memory: use correct flags for device private PMD entry Commit 65edfda6f3f2 ("mm/rmap: extend rmap and migration support device-private entries") updated set_pmd_migration_entry() to use pmdp_huge_get_and_clear() in the softleaf case, but made no further adjustments to the function itself. Therefore this function continues to incorrectly use pmd_write(), pmd_soft_dirty() and pmd_uffd_wp() to determine whether the installed migration entry should be marked writable, softdirty or uffd-wp respectively. Whilst all are incorrect, the most problematic of these is pmd_write(), as this can lead to corrupted rmap state. On x86-64 _PAGE_SWP_SOFT_DIRTY is aliased to _PAGE_RW. So calling pmd_write() on a softleaf will return the softdirty state encoded in the entry, assuming CONFIG_MEM_SOFT_DIRTY was enabled. This was observed when running the hmm.hmm_device_private.anon_write_child selftest: 1. The test faults in a range then migrates it such that a device-private THP range is established. 2. The parent then migrates it to a device-private writable PMD entry whose folio is entirely AnonExclusive with entire_mapcount=1, softdirty set (accidentally correct write state). 3. The parent forks and the PMD entries are set to device-private read only entries, entire_mapcount=2, softdirty still set. 4. [BUG] The child writes to the range then migrates to RAM - intending to install non-writable migration en…
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-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-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-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-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-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-nvidia-6.2
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Ubuntu:22.04:LTS
linux-nvidia-6.5
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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-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-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:24.04:LTS
linux-aws-6.14
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Ubuntu:24.04:LTS
linux-aws-7.0
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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-7.0
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Ubuntu:24.04:LTS
linux-azure-fde-6.14
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Ubuntu:24.04:LTS
linux-azure-fde-7.0
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Ubuntu:24.04:LTS
linux-azure-nvidia-6.14
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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-7.0
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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-7.0
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Ubuntu:24.04:LTS
linux-lowlatency-hwe-6.11
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Ubuntu:24.04:LTS
linux-nvidia-6.11
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Ubuntu:24.04:LTS
linux-nvidia-7.0
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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-6.8
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Ubuntu:24.04:LTS
linux-oracle-6.14
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Ubuntu:24.04:LTS
linux-oracle-7.0
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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-7.0
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Ubuntu:Pro:Realtime:24.04:LTS
linux-realtime-6.14
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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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参照URL
- advisory ubuntu.com
- advisory ubuntu.com
- advisory ubuntu.com
- advisory ubuntu.com
- advisory ubuntu.com
- advisory ubuntu.com
- advisory ubuntu.com
- advisory ubuntu.com
- advisory ubuntu.com
- advisory ubuntu.com
- advisory ubuntu.com
- report ubuntu.com
- report cve.org
- report git.kernel.org
- report git.kernel.org
- report git.kernel.org