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NVD / CVE Program· CNA Linux

CVE-2026-23038: pnfs/flexfiles: Fix memory leak in nfs4_ff_alloc_deviceid_node()

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: 0.28% (FIRST EPSS).
  • Fixed version: Linux Linux 0c728083654f0066f5e10a1d2b0bd0907af19a58, 27c90d8ed81e7a289c9fe41b5e31d8bb609a3385, 34b9dd179818ff7af2b36410985fd8166573c62d.

Low priority for now. Upgrade to Linux Linux 0c728083654f0066f5e10a1d2b0bd0907af19a58, 27c90d8ed81e7a289c9fe41b5e31d8bb609a3385, 34b9dd179818ff7af2b36410985fd8166573c62d 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: pnfs/flexfiles: Fix memory leak in nfs4_ff_alloc_deviceid_node() In nfs4_ff_alloc_deviceid_node(), if the allocation for ds_versions fails, the function jumps to the out_scratch label without freeing the already allocated dsaddrs list, leading to a memory leak. Fix this by jumping to the out_err_drain_dsaddrs label, which properly frees the dsaddrs list before cleaning up other resources.

—No exploit Fix available
Published
Jan 31, 2026
Updated
Nov 10, 2026
EPSS
0.2% · 20th percentile

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%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

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

    • 4.0affected
    • d67ae825a59d639e4d8b82413af84d854617a87e and later · before e2dde5dafb80f1af4028ed10ad255f42af71c784affected · git
    • d67ae825a59d639e4d8b82413af84d854617a87e and later · before 27c90d8ed81e7a289c9fe41b5e31d8bb609a3385affected · git
    • d67ae825a59d639e4d8b82413af84d854617a87e and later · before 34b9dd179818ff7af2b36410985fd8166573c62daffected · git
    • d67ae825a59d639e4d8b82413af84d854617a87e and later · before 869862056e100973e76ce9f5f1b01837771b7722affected · git
    • d67ae825a59d639e4d8b82413af84d854617a87e and later · before 86da7efd12295a7e2b4abde5e5984c821edd938faffected · git
    • d67ae825a59d639e4d8b82413af84d854617a87e and later · before ed5d3f2f6885eb99f729e6ffd946e3aa058bd3ebaffected · git
    • d67ae825a59d639e4d8b82413af84d854617a87e and later · before 0c728083654f0066f5e10a1d2b0bd0907af19a58affected · git
    • before 4.0not affected · semver
    • 5.10.249 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.8-16.18.8-1

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-2026-23039Jan 31, 2026 · drm/gud: fix NULL fb and crtc dereferences on USB disconnect
    0Monitor
  • ← EarlierCVE-2026-23035Jan 31, 2026 · net/mlx5e: Pass netdev to mlx5e_destroy_netdev instead of priv
    0Monitor
  • Later →CVE-2025-71192Feb 4, 2026 · ALSA: ac97: fix a double free in snd_ac97_controller_register()
    28Monitor

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 Linux0c728083654f0066f5e10a1d2b0bd0907af19a58Vendor (CNA)
Linux Linux27c90d8ed81e7a289c9fe41b5e31d8bb609a3385Vendor (CNA)
Linux Linux34b9dd179818ff7af2b36410985fd8166573c62dVendor (CNA)
Linux Linux869862056e100973e76ce9f5f1b01837771b7722Vendor (CNA)
Linux Linux86da7efd12295a7e2b4abde5e5984c821edd938fVendor (CNA)
Linux Linuxe2dde5dafb80f1af4028ed10ad255f42af71c784Vendor (CNA)
Linux Linuxed5d3f2f6885eb99f729e6ffd946e3aa058bd3ebVendor (CNA)
debian:linux6.1.162-1 · Debian:12Package 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.

No history yet (it accumulates with the daily EPSS job).

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

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

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.

  • CVE-2026-68240191 days apartdrm/gpusvm: publish dpagemap early to avoid device mapping leak on error
    35Monitor
  • CVE-2026-64463175 days apartusb: typec: tcpci_rt1711h: unregister TCPCI port with devres
    31Monitor
  • CVE-2026-64485175 days apartALSA: compress: Fix task creation error unwind
    31Monitor
  • CVE-2026-68213191 days apartmedia: rtl2832_sdr: Return queued buffers on start_streaming() failure
    31Monitor
  • CVE-2026-68216191 days apartmedia: pwc: Return queued buffers on start_streaming() failure
    31Monitor
  • CVE-2026-68298191 days apartdrm/xe/vm: Fix SVM leak on resv obj alloc failure in xe_vm_create()
    31Monitor

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)

CWE-401 · Missing Release of Memory after Effective Lifetime

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (9 more)

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

All records