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CVE-2026-98161— nvdimm: pmem: keep PREFLUSH before data writes

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： nvdimm: pmem: 在数据写入前确保执行 PREFLUSH 会记录 错误，但仍继续复制 bio 数据，并可能随后用成功的 刷写操作覆盖该错误。这导致在预刷写（preflush）失败后，数据写入仍会继续执行，尽管顺序屏障（ordering barrier）已失败，但 bio 仍可能成功完成。 为确保数据一致性，应在处理 bio 数据之前同步执行 刷写操作；若该操作失败，则使用刷写错误来完成 bio。对于 ，保持异步刷写链式调用机制：此时数据复制已完成，父 bio 可等

AI Predicted 7.5 Difficulty: Easy EPSS 0.15% · P4

Possible ATT&CK Techniques 2 AI

T1499 · Endpoint Denial of Service T1562

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux c5d4355d10d414a96ca870b731756b89d068d57a< 770a90c2127220f0fc194ce909ad4f0842e141cb affected
c5d4355d10d414a96ca870b731756b89d068d57a< 72561ca1ab96f0f0f32737a6171641e05a318538 affected
c5d4355d10d414a96ca870b731756b89d068d57a< c644a2f8fef5618fcf453c591177700fd07dd024 affected
5.3 affected
< 5.3 unaffected
6.18.52≤ 6.18.* unaffected
7.2.6≤ 7.2.* unaffected
7.3-rc1≤ * unaffected
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I. Basic Information for CVE-2026-98161

Vulnerability Information
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Vulnerability Title
nvdimm: pmem: keep PREFLUSH before data writes
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nvdimm: pmem: keep PREFLUSH before data writes pmem_submit_bio() records a REQ_PREFLUSH error, but continues to copy the bio data and can later overwrite the error with a successful REQ_FUA flush. That lets data writes run after a failed preflush and can complete the bio successfully despite the failed ordering barrier. Run the REQ_PREFLUSH flush synchronously before touching the bio data and complete the bio with the flush error if it fails. Keep asynchronous flush chaining for REQ_FUA. At that point, data copy has completed and the parent bio can wait for the chained flush bio.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux c5d4355d10d414a96ca870b731756b89d068d57a ~ 770a90c2127220f0fc194ce909ad4f0842e141cb -
Linux Linux 5.3 -

II. Public POCs for CVE-2026-98161

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III. Intelligence Information for CVE-2026-98161

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Patches & Fixes for CVE-2026-98161 (3)

Same Patch Batch · Linux · 2026-09-25 · 372 CVEs total

CVE-2026-100075 9.8 CRITICAL RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters
CVE-2026-97555 8.8 HIGH smb: client: fix heap overflow in DACL owner/group rewrite
CVE-2026-97957 8.8 HIGH net: hinic: fix mailbox segment buffer overflow
CVE-2026-97527 8.8 HIGH scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock
CVE-2026-97528 8.8 HIGH scsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error
CVE-2026-98115 8.8 HIGH ksmbd: safely drain sessions during logoff
CVE-2026-97525 8.2 HIGH x86/mm/pat: Allocate split page tables as kernel page tables
CVE-2026-98069 8.1 HIGH net/rds: acquire the fastpath locks in rds_conn_shutdown()
CVE-2026-97573 8.1 HIGH bnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset()
CVE-2026-97570 8.1 HIGH bnxt_en: Bound SW TPA IDs to prevent crashes
CVE-2026-98130 8.1 HIGH sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START
CVE-2026-98070 8.1 HIGH net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks()
CVE-2026-98122 7.8 HIGH vxlan: mdb: Fix use-after-free in vxlan_mdb_remote_src_del()
CVE-2026-97575 7.8 HIGH media: v4l2-ctrls: validate AV1 tile counts
CVE-2026-97576 7.8 HIGH media: v4l2-ctrls: validate HEVC tile counts
CVE-2026-97941 7.8 HIGH mm/slab: take n->list_lock in __slab_try_return_freelist() to avoid race
CVE-2026-98112 7.8 HIGH ksmbd: fix listener task lifetime on netdev events
CVE-2026-98116 7.8 HIGH ALSA: pcm: Serialize PCM mmap with buffer reallocation to fix page UAF
CVE-2026-97580 7.8 HIGH media: rkvdec: bound HEVC tile loops and PPS id to the array capacity
CVE-2026-97940 7.8 HIGH ipv6: fix fib6 walker UAF on seq stop

Showing top 20 of 372 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98161

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