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NVD / CVE Program· CNA Linux

CVE-2023-54089: virtio_pmem: add the missing REQ_OP_WRITE for flush bio

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.20% (FIRST EPSS).
  • Fixed version: Linux Linux c1dbd8a849183b9c12d257ad3043ecec50db50b3, c7ab7e45ccef209809f8c2b00f497deec06b29c0, e39e870e1e683a71d3d2e63e661a5695f60931a7.

Low priority for now. Upgrade to Linux Linux c1dbd8a849183b9c12d257ad3043ecec50db50b3, c7ab7e45ccef209809f8c2b00f497deec06b29c0, e39e870e1e683a71d3d2e63e661a5695f60931a7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: virtio_pmem: add the missing REQ_OP_WRITE for flush bio When doing mkfs.xfs on a pmem device, the following warning was ------------[ cut here ]------------ WARNING: CPU: 2 PID: 384 at block/blk-core.c:751 submit_bio_noacct Modules linked in: CPU: 2 PID: 384 Comm: mkfs.xfs Not tainted 6.4.0-rc7+ #154 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:submit_bio_noacct+0x340/0x520 ...... Call Trace: <TASK> ? submit_bio_noacct+0xd5/0x520 submit_bio+0x37/0x60 async_pmem_flush+0x79/0xa0 nvdimm_flush+0x17/0x40 pmem_submit_bio+0x370/0x390 __submit_bio+0xbc/0x190 submit_bio_noacct_nocheck+0x14d/0x370 submit_bio_noacct+0x1ef/0x520 submit_bio+0x55/0x60 submit_bio_wait+0x5a/0xc0 blkdev_issue_flush+0x44/0x60 The root cause is that submit_bio_noacct() needs bio_op() is either WRITE or ZONE_APPEND for flush bio and async_pmem_flush() doesn't assign REQ_OP_WRITE when allocating flush bio, so submit_bio_noacct just fail the flush bio. Simply fix it by adding the missing REQ_OP_WRITE for flush bio. And we could fix the flush order issue and do flush optimization later.

—No exploit Fix available
Published
Dec 24, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 10th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

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—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 6.3affected
    • b4a6bb3a67aa0c37b2b6cd47efc326eb455de674 and later · before e39e870e1e683a71d3d2e63e661a5695f60931a7affected · git
    • b4a6bb3a67aa0c37b2b6cd47efc326eb455de674 and later · before c7ab7e45ccef209809f8c2b00f497deec06b29c0affected · git
    • b4a6bb3a67aa0c37b2b6cd47efc326eb455de674 and later · before c1dbd8a849183b9c12d257ad3043ecec50db50b3affected · git
    • before 6.3not affected · semver
    • 6.4.16 and later · up to and including 6.4.*not affected · semver
    • 6.5.3 and later · up to and including 6.5.*not affected · semver
    • 6.6 and laternot affected · original_commit_for_fix

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:13linuxbefore 6.5.3-16.5.3-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2023-54086Dec 24, 2025 · bpf: Add preempt_count_{sub,add} into btf id deny list
    0Monitor
  • ← EarlierCVE-2023-54087Dec 24, 2025 · ubi: Fix possible null-ptr-deref in ubi_free_volume()
    0Monitor
  • Later →CVE-2023-54090Dec 24, 2025 · ixgbe: Fix panic during XDP_TX with > 64 CPUs
    39Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linuxc1dbd8a849183b9c12d257ad3043ecec50db50b3Vendor (CNA)
Linux Linuxc7ab7e45ccef209809f8c2b00f497deec06b29c0Vendor (CNA)
Linux Linuxe39e870e1e683a71d3d2e63e661a5695f60931a7Vendor (CNA)
debian:linux6.5.3-1 · Debian:13Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

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No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

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Change log

  1. Fix✗ → ✓

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References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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