Cette page suit l'état du correctif pour Ubuntu. La vulnérabilité elle-même est décrite sur la page CVE principale. Voir CVE-2026-93229 →
Catégories
UBUNTU-CVE-2026-93229

In the Linux kernel, the following vulnerability has been resolved: nfsd: add missing read barrier to rpc_status_get dumpit seqcount retry The hand-ro...

Description d'origine

La description telle que publiée par la source (souvent en anglais).

In the Linux kernel, the following vulnerability has been resolved: nfsd: add missing read barrier to rpc_status_get dumpit seqcount retry The hand-rolled seqcount-like protocol in nfsd_nl_rpc_status_get_dumpit() is missing a read memory barrier (smp_rmb) before its second counter check. The standard kernel read_seqcount_retry() includes smp_rmb() to ensure that all data reads complete before the counter is re-checked. Without this barrier, on weakly-ordered architectures (ARM, POWER), the CPU may reorder field reads past the second counter check, making the retry logic ineffective: it could observe a consistent counter pair while reading fields that have been concurrently modified by the writer. Add smp_rmb() before the second counter check to order the field reads ahead of it, matching the barrier semantics of the standard seqcount read-side. The begin-side smp_load_acquire() already pairs with the smp_store_release() in nfsd_dispatch(); with the smp_rmb() now ordering the field reads, the retry check no longer needs acquire semantics and reads the counter with a plain READ_ONCE(), as read_seqcount_retry() does. [ cel: Use READ_ONCE instead of smp_load_acquire() ]

Source: OSV.dev (Open Source Vulnerabilities) OSV

Paquets affectés

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
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS linux-hwe
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
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
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
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
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS linux-azure-fde-5.19
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Ubuntu:22.04:LTS linux-azure-fde-6.2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS linux-azure-fde-6.8
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS linux-gcp-5.19
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS linux-gcp-6.2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS linux-gcp-6.5
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
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
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
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
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
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
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS linux-realtime
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS linux-riscv
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Références

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