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CVE-2026-89706

Опубликовано: 14 сент. 2026
Источник: ubuntu
Приоритет: medium
EPSS Низкий
CVSS3: 7.5

Описание

In the Linux kernel, the following vulnerability has been resolved: nfsd: Reset write verifier when async COPY writeback fails Async COPY captures nn->writeverf at request time and reports it to the client via CB_OFFLOAD after the worker kthread completes. When the post-copy vfs_fsync_range() or filemap_check_wb_err() in _nfsd_copy_file_range() reports an error, the worker correctly leaves NFSD4_COPY_F_COMMITTED clear so that CB_OFFLOAD encodes wr_stable_how as NFS_UNSTABLE, but the server's write verifier is not rotated. A client that receives NFS_UNSTABLE in CB_OFFLOAD follows up with COMMIT to make the copied data durable. With the verifier unchanged, COMMIT returns the same value the client just received via CB_OFFLOAD, and the client concludes the copy is durable -- silently dropping the data whose writeback in fact failed. This violates the UNSTABLE+COMMIT durability contract (RFC 7862 section 15.1, RFC 8881 section 18.32) and matches the bug just fixed in nfsd_vfs_write() and...

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needs-triage

noble

DNE

resolute

DNE

upstream

needs-triage

Показывать по

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DNE

jammy

DNE

noble

needs-triage

resolute

DNE

upstream

needs-triage

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DNE

esm-infra-legacy/xenial

ignored

superseded by linux-hwe
esm-infra/bionic

ignored

superseded by linux-hwe-5.4
jammy

DNE

noble

DNE

resolute

DNE

upstream

ignored

end of life

Показывать по

РелизСтатусПримечание
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needs-triage

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needs-triage

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noble

needs-triage

resolute

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Показывать по

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DNE

esm-infra/focal

needs-triage

jammy

DNE

noble

DNE

resolute

DNE

upstream

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РелизСтатусПримечание
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DNE

esm-infra/bionic

needs-triage

jammy

DNE

noble

DNE

resolute

DNE

upstream

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РелизСтатусПримечание
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DNE

jammy

needs-triage

noble

DNE

resolute

DNE

upstream

needs-triage

Показывать по

РелизСтатусПримечание
devel

DNE

esm-infra/focal

ignored

end of kernel support
jammy

DNE

noble

DNE

resolute

DNE

upstream

ignored

end of life

Показывать по

РелизСтатусПримечание
devel

DNE

jammy

ignored

superseded by Ubuntu Pro ppa version
noble

DNE

realtime/jammy

needs-triage

resolute

DNE

upstream

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DNE

jammy

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noble

DNE

resolute

DNE

upstream

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DNE

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needs-triage

jammy

DNE

noble

DNE

resolute

DNE

upstream

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DNE

esm-infra/focal

needs-triage

jammy

DNE

noble

DNE

resolute

DNE

upstream

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DNE

esm-infra-legacy/xenial

needs-triage

esm-infra/bionic

needs-triage

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needs-triage

jammy

needs-triage

noble

DNE

resolute

DNE

upstream

needs-triage

Показывать по

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DNE

jammy

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noble

needs-triage

resolute

DNE

upstream

needs-triage

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РелизСтатусПримечание
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DNE

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needs-triage

jammy

DNE

noble

DNE

resolute

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upstream

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devel

DNE

jammy

ignored

superseded by linux-lowlatency-hwe-6.2
noble

DNE

resolute

DNE

upstream

ignored

superseded by linux-lowlatency-hwe-6.2

Показывать по

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DNE

jammy

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ignored

replaced by linux-hwe-6.14
resolute

DNE

upstream

ignored

replaced by linux-hwe-6.14

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devel

DNE

jammy

ignored

superseded by linux-lowlatency-hwe-6.5
noble

DNE

resolute

DNE

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ignored

superseded by linux-lowlatency-hwe-6.5

Показывать по

РелизСтатусПримечание
devel

DNE

jammy

ignored

superseded by linux-lowlatency-hwe-6.8
noble

DNE

resolute

DNE

upstream

ignored

superseded by linux-lowlatency-hwe-6.8

Показывать по

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jammy

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DNE

resolute

DNE

upstream

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DNE

esm-infra-legacy/trusty

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jammy

DNE

noble

DNE

resolute

DNE

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DNE

jammy

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needs-triage

resolute

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DNE

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ignored

end of kernel support
resolute

DNE

upstream

ignored

end of kernel support

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DNE

jammy

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superseded by linux-nvidia-6.5
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DNE

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superseded by linux-nvidia-6.5

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jammy

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superseded by linux-nvidia-6.8
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DNE

resolute

DNE

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superseded by linux-nvidia-6.8

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jammy

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DNE

resolute

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jammy

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noble

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resolute

DNE

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DNE

jammy

DNE

noble

DNE

resolute

needs-triage

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DNE

jammy

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noble

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DNE

upstream

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DNE

jammy

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needs-triage

resolute

DNE

upstream

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Показывать по

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DNE

esm-infra/focal

needs-triage

jammy

DNE

noble

DNE

resolute

DNE

upstream

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DNE

jammy

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DNE

resolute

DNE

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DNE

esm-infra/bionic

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jammy

DNE

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DNE

resolute

DNE

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end of life

Показывать по

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DNE

esm-infra/focal

ignored

superseded by linux-oem-5.13
jammy

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superseded by linux-oem-5.13

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DNE

esm-infra/focal

ignored

superseded by linux-oem-5.14
jammy

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superseded by linux-oem-5.14

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DNE

esm-infra/focal

ignored

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jammy

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resolute

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replaced by linux-hwe-5.15

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DNE

jammy

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superseded by linux-oem-6.1
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DNE

resolute

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superseded by linux-oem-6.1

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esm-infra/focal

ignored

superseded by linux-oem-5.10
jammy

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superseded by linux-oem-5.10

Показывать по

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jammy

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superseded by linux-oem-6.1
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resolute

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superseded by linux-oem-6.1

Показывать по

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superseded by linux-oem-6.5
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DNE

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DNE

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superseded by linux-oem-6.5

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resolute

DNE

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jammy

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jammy

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superseded by linux-oem-6.8
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resolute

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superseded by linux-oem-6.8

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jammy

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superseded by linux-oem-6.14
resolute

DNE

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DNE

jammy

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DNE

resolute

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DNE

esm-infra/bionic

ignored

superseded by linux-oracle-5.3
jammy

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superseded by linux-oracle-5.3

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ignored

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superseded by linux-oracle-5.13

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РелизСтатусПримечание
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esm-infra/focal

ignored

superseded by linux-oracle-5.15
jammy

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superseded by linux-oracle-5.15

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needs-triage

jammy

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РелизСтатусПримечание
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esm-infra/bionic

ignored

superseded by linux-oracle-5.4
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superseded by linux-oracle-5.4

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DNE

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jammy

DNE

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DNE

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РелизСтатусПримечание
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esm-infra/focal

ignored

superseded by linux-oracle-5.11
jammy

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superseded by linux-oracle-5.11

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jammy

DNE

noble

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resolute

DNE

upstream

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devel

DNE

jammy

DNE

noble

needs-triage

resolute

DNE

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Показывать по

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devel

DNE

jammy

ignored

superseded by linux-oracle-6.8
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resolute

DNE

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ignored

superseded by linux-oracle-6.8

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jammy

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DNE

resolute

DNE

upstream

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Показывать по

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jammy

DNE

noble

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DNE

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DNE

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devel

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noble

ignored

superseded by Ubuntu Pro ppa version
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esm-infra/focal

ignored

replaced by linux-raspi
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replaced by linux-raspi

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ignored

superseded by Ubuntu Pro ppa version
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ignored

superseded by Ubuntu Pro ppa version
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needs-triage

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needs-triage

resolute

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Показывать по

РелизСтатусПримечание
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DNE

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DNE

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DNE

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ignored

superseded by linux-riscv-5.8
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end of kernel support
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replaced by linux-riscv-6.14
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ignored

superseded by linux-riscv-5.13
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superseded by linux-riscv-5.13

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Показывать по

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DNE

jammy

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end of kernel support
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end of life

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superseded by linux-riscv-5.11
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superseded by linux-riscv-5.11

Показывать по

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superseded by linux-riscv-6.17
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end of kernel support
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DNE

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Показывать по

EPSS

Процентиль: 37%
0.00444
Низкий

7.5 High

CVSS3

Связанные уязвимости

CVSS3: 6.8
redhat
4 дня назад

In the Linux kernel, the following vulnerability has been resolved: nfsd: Reset write verifier when async COPY writeback fails Async COPY captures nn->writeverf at request time and reports it to the client via CB_OFFLOAD after the worker kthread completes. When the post-copy vfs_fsync_range() or filemap_check_wb_err() in _nfsd_copy_file_range() reports an error, the worker correctly leaves NFSD4_COPY_F_COMMITTED clear so that CB_OFFLOAD encodes wr_stable_how as NFS_UNSTABLE, but the server's write verifier is not rotated. A client that receives NFS_UNSTABLE in CB_OFFLOAD follows up with COMMIT to make the copied data durable. With the verifier unchanged, COMMIT returns the same value the client just received via CB_OFFLOAD, and the client concludes the copy is durable -- silently dropping the data whose writeback in fact failed. This violates the UNSTABLE+COMMIT durability contract (RFC 7862 section 15.1, RFC 8881 section 18.32) and matches the bug just fixed in nfsd_vfs_write() and...

CVSS3: 7.5
nvd
4 дня назад

In the Linux kernel, the following vulnerability has been resolved: nfsd: Reset write verifier when async COPY writeback fails Async COPY captures nn->writeverf at request time and reports it to the client via CB_OFFLOAD after the worker kthread completes. When the post-copy vfs_fsync_range() or filemap_check_wb_err() in _nfsd_copy_file_range() reports an error, the worker correctly leaves NFSD4_COPY_F_COMMITTED clear so that CB_OFFLOAD encodes wr_stable_how as NFS_UNSTABLE, but the server's write verifier is not rotated. A client that receives NFS_UNSTABLE in CB_OFFLOAD follows up with COMMIT to make the copied data durable. With the verifier unchanged, COMMIT returns the same value the client just received via CB_OFFLOAD, and the client concludes the copy is durable -- silently dropping the data whose writeback in fact failed. This violates the UNSTABLE+COMMIT durability contract (RFC 7862 section 15.1, RFC 8881 section 18.32) and matches the bug just fixed in nfsd_vfs_write() and

CVSS3: 7.5
debian
4 дня назад

In the Linux kernel, the following vulnerability has been resolved: n ...

CVSS3: 7.5
github
4 дня назад

In the Linux kernel, the following vulnerability has been resolved: nfsd: Reset write verifier when async COPY writeback fails Async COPY captures nn->writeverf at request time and reports it to the client via CB_OFFLOAD after the worker kthread completes. When the post-copy vfs_fsync_range() or filemap_check_wb_err() in _nfsd_copy_file_range() reports an error, the worker correctly leaves NFSD4_COPY_F_COMMITTED clear so that CB_OFFLOAD encodes wr_stable_how as NFS_UNSTABLE, but the server's write verifier is not rotated. A client that receives NFS_UNSTABLE in CB_OFFLOAD follows up with COMMIT to make the copied data durable. With the verifier unchanged, COMMIT returns the same value the client just received via CB_OFFLOAD, and the client concludes the copy is durable -- silently dropping the data whose writeback in fact failed. This violates the UNSTABLE+COMMIT durability contract (RFC 7862 section 15.1, RFC 8881 section 18.32) and matches the bug just fixed in nfsd_vfs_write() ...

EPSS

Процентиль: 37%
0.00444
Низкий

7.5 High

CVSS3

Уязвимость CVE-2026-89706