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NVD / CVE Program· CNA Linux

CVE-2023-54026: opp: Fix use-after-free in lazy_opp_tables after probe deferral

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.14% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 39a0e723d3502f6dc4c603f57ebe8dc7bcc4a4bc, 76ab057de777723ec924654502d1a260ba7d7d54, b2a2ab039bd58f51355e33d7d3fc64605d7f870d.

Low priority for now. Upgrade to Linux Linux 39a0e723d3502f6dc4c603f57ebe8dc7bcc4a4bc, 76ab057de777723ec924654502d1a260ba7d7d54, b2a2ab039bd58f51355e33d7d3fc64605d7f870d 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: opp: Fix use-after-free in lazy_opp_tables after probe deferral When dev_pm_opp_of_find_icc_paths() in _allocate_opp_table() returns -EPROBE_DEFER, the opp_table is freed again, to wait until all the interconnect paths are available. However, if the OPP table is using required-opps then it may already have been added to the global lazy_opp_tables list. The error path does not remove the opp_table from the list again. This can cause crashes later when the provider of the required-opps is added, since we will iterate over OPP tables that have already been freed. E.g.: Unable to handle kernel NULL pointer dereference when read CPU: 0 PID: 7 Comm: kworker/0:0 Not tainted 6.4.0-rc3 PC is at _of_add_opp_table_v2 (include/linux/of.h:949 drivers/opp/of.c:98 drivers/opp/of.c:344 drivers/opp/of.c:404 drivers/opp/of.c:1032) -> lazy_link_required_opp_table() Fix this by calling _of_clear_opp_table() to remove the opp_table from the list and clear other allocated resources. While at it, also add the missing mutex_destroy() calls in the error path.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Dec 24, 2025
Updated
Aug 5, 2026
EPSS
0.1% · 3th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.8
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.

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  • Not in KEV: no record of exploitation in the wild
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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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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

    • 5.12affected
    • 7eba0c7641b0009818e469dbfcdd87a0155ab9d4 and later · before 39a0e723d3502f6dc4c603f57ebe8dc7bcc4a4bcaffected · git
    • 7eba0c7641b0009818e469dbfcdd87a0155ab9d4 and later · before 76ab057de777723ec924654502d1a260ba7d7d54affected · git
    • 7eba0c7641b0009818e469dbfcdd87a0155ab9d4 and later · before c05e76d6b249e5254c31994eedd06dd3cc90dee0affected · git
    • 7eba0c7641b0009818e469dbfcdd87a0155ab9d4 and later · before b2a2ab039bd58f51355e33d7d3fc64605d7f870daffected · git
    • before 5.12not affected · semver
    • 5.15.121 and later · up to and including 5.15.*not affected · semver
    • 6.1.40 and later · up to and including 6.1.*not affected · semver
    • 6.4.5 and later · up to and including 6.4.*not affected · semver
    • 6.5 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:12linuxbefore 6.1.52-16.1.52-1
Debian:13linuxbefore 6.4.11-16.4.11-1

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-2023-54024Dec 24, 2025 · KVM: Destroy target device if coalesced MMIO unregistration fails
    0Monitor
  • ← EarlierCVE-2023-54025Dec 24, 2025 · wifi: rsi: Do not configure WoWlan in shutdown hook if not enabled
    0Monitor
  • Later →CVE-2023-54027Dec 24, 2025 · iio: core: Prevent invalid memory access when there is no parent
    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 Linux39a0e723d3502f6dc4c603f57ebe8dc7bcc4a4bcVendor (CNA)
Linux Linux76ab057de777723ec924654502d1a260ba7d7d54Vendor (CNA)
Linux Linuxb2a2ab039bd58f51355e33d7d3fc64605d7f870dVendor (CNA)
Linux Linuxc05e76d6b249e5254c31994eedd06dd3cc90dee0Vendor (CNA)
debian:linux6.1.52-1 · 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.

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.
  • A low-privileged account is enough.
  • 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
Low
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:L/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 (3 more)

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

All records