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NVD / CVE Program· CNA Linux

CVE-2026-72489: staging: nvec: fix use-after-free in nvec_rx_completed()

Noroxi assessment

Priority: Monitor (action score 33/100)

  • 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: 0.19% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 08626fcfe12308ca3f8b22c538ba7dee0b2dce7a, 26813881181deb3a32fbb59eadb2599cbe8423f6, 5de04caa46b635e180cecbd164e333eca535db94.

Low priority for now. Upgrade to Linux Linux 08626fcfe12308ca3f8b22c538ba7dee0b2dce7a, 26813881181deb3a32fbb59eadb2599cbe8423f6, 5de04caa46b635e180cecbd164e333eca535db94 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: staging: nvec: fix use-after-free in nvec_rx_completed() In nvec_rx_completed(), when an incomplete RX transfer is detected, nvec_msg_free() is called to return the message back to the pool by clearing its 'used' atomic flag. Immediately after this, the code accesses nvec->rx->data[0] to check the message type. Since nvec_msg_free() marks the pool slot as available via atomic_set(), any concurrent or subsequent call to nvec_msg_alloc() could claim that same slot and overwrite its data[] array. Reading nvec->rx->data[0] after freeing the message is therefore a use-after-free. Fix this by saving the message type byte before calling nvec_msg_free(), then using the saved value for the battery quirk check.

HighCVSS 8.4 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Aug 17, 2026
EPSS
0.1% · 8th percentile
CWE
—

Report tools

JSON

Action score

33

Monitor

Low priority for now.

CVSS
33 / 40 · 8.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
8.4
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-72489

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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

    • 3.2affected
    • d6bdcf2e1019351cbc176e963b7756766bdd8721 and later · before 6b2ea886ebdae44a2394029844a4e78f58e1587daffected · git
    • d6bdcf2e1019351cbc176e963b7756766bdd8721 and later · before a37625c7b688fcf68a54263528eccbabfd7fa17aaffected · git
    • d6bdcf2e1019351cbc176e963b7756766bdd8721 and later · before 9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89affected · git
    • d6bdcf2e1019351cbc176e963b7756766bdd8721 and later · before 08626fcfe12308ca3f8b22c538ba7dee0b2dce7aaffected · git
    • d6bdcf2e1019351cbc176e963b7756766bdd8721 and later · before f19a5bc059051143c489dd6f79a0f9c3bfd13aeaaffected · git
    • d6bdcf2e1019351cbc176e963b7756766bdd8721 and later · before bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90affected · git
    • d6bdcf2e1019351cbc176e963b7756766bdd8721 and later · before 5de04caa46b635e180cecbd164e333eca535db94affected · git
    • d6bdcf2e1019351cbc176e963b7756766bdd8721 and later · before 26813881181deb3a32fbb59eadb2599cbe8423f6affected · git
    • before 3.2not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

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-2026-72484Aug 15, 2026 · staging: most: video: avoid double free on video register failure
    0Monitor
  • ← EarlierCVE-2026-72486Aug 15, 2026 · mailbox: mtk-adsp: fix UAF during device teardown
    0Monitor
  • Later →CVE-2026-72490Aug 15, 2026 · staging: rtl8723bs: fix stainfo check in rtw_aes_decrypt
    0Monitor

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 Linux08626fcfe12308ca3f8b22c538ba7dee0b2dce7aVendor (CNA)
Linux Linux26813881181deb3a32fbb59eadb2599cbe8423f6Vendor (CNA)
Linux Linux5de04caa46b635e180cecbd164e333eca535db94Vendor (CNA)
Linux Linux6b2ea886ebdae44a2394029844a4e78f58e1587dVendor (CNA)
Linux Linux9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89Vendor (CNA)
Linux Linuxa37625c7b688fcf68a54263528eccbabfd7fa17aVendor (CNA)
Linux Linuxbb3d592c7d6c4ec8ac6640c690ca13298e7e8e90Vendor (CNA)
Linux Linuxf19a5bc059051143c489dd6f79a0f9c3bfd13aeaVendor (CNA)
debian:linux6.1.180-1 · 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.

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

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.

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

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

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✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

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

All records