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CVE-2023-54033· NVD / CVE Program· CNA Linux

bpf: fix a memory leak in the LRU and LRU_PERCPU hash maps

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: 0.18% (FIRST EPSS).
  • Fixed version: Linux Linux 1a9e80f757bbb1562d82e350afce2bb2f712cc3d, 79ea1a12fb9a8275b6e19d4ca625dd872dedcbb9, 965e9cccbe6b9c7b379908cebcb5e3a47f20dd5e.

Low priority for now. Upgrade to Linux Linux 1a9e80f757bbb1562d82e350afce2bb2f712cc3d, 79ea1a12fb9a8275b6e19d4ca625dd872dedcbb9, 965e9cccbe6b9c7b379908cebcb5e3a47f20dd5e 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: bpf: fix a memory leak in the LRU and LRU_PERCPU hash maps The LRU and LRU_PERCPU maps allocate a new element on update before locking the target hash table bucket. Right after that the maps try to lock the bucket. If this fails, then maps return -EBUSY to the caller without releasing the allocated element. This makes the element untracked: it doesn't belong to either of free lists, and it doesn't belong to the hash table, so can't be re-used; this eventually leads to the permanent -ENOMEM on LRU map updates, which is unexpected. Fix this by returning the element to the local free list if bucket locking fails.

—No exploit Fix available
Published
Dec 24, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 7th 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 · 0.1%

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

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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

    • 5.11affected
    • 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 and later · before 79ea1a12fb9a8275b6e19d4ca625dd872dedcbb9affected · git
    • 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 and later · before 1a9e80f757bbb1562d82e350afce2bb2f712cc3daffected · git
    • 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 and later · before 965e9cccbe6b9c7b379908cebcb5e3a47f20dd5eaffected · git
    • 20b6cc34ea74b6a84599c1f8a70f3315b56a1883 and later · before b34ffb0c6d23583830f9327864b9c1f486003305affected · git
    • before 5.11not affected · semver
    • 5.15.115 and later · up to and including 5.15.*not affected · semver
    • 6.1.31 and later · up to and including 6.1.*not affected · semver
    • 6.3.5 and later · up to and including 6.3.*not affected · semver
    • 6.4 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 6.1.37-16.1.37-1
Debian:13linuxbefore 6.3.7-16.3.7-1

Same product

linux: all records

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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 Linux1a9e80f757bbb1562d82e350afce2bb2f712cc3dVendor (CNA)
Linux Linux79ea1a12fb9a8275b6e19d4ca625dd872dedcbb9Vendor (CNA)
Linux Linux965e9cccbe6b9c7b379908cebcb5e3a47f20dd5eVendor (CNA)
Linux Linuxb34ffb0c6d23583830f9327864b9c1f486003305Vendor (CNA)
debian:linux6.1.37-1 · 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

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.

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

Change log

  1. Fix✗ → ✓

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References

Show all references (3 more)

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

All records