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NVD / CVE Program· CNA Linux

CVE-2026-64173: tracing: Do not call map->ops->elt_free() if elt_alloc() fails

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.11% (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 1a150947f8480262a46c860f1acb9c6597ca7097, 49332e49ad5b20262cc719b03d4123b9362de701, 798183376d9d3e278a270ea0e75a5769c8f145d9.

Low priority for now. Upgrade to Linux Linux 1a150947f8480262a46c860f1acb9c6597ca7097, 49332e49ad5b20262cc719b03d4123b9362de701, 798183376d9d3e278a270ea0e75a5769c8f145d9 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: tracing: Do not call map->ops->elt_free() if elt_alloc() fails In paths where tracing_map_elt_alloc() failed to allocate objects, the map->ops->elt_alloc() call was never successful. In this case, map->ops->elt_free() should not be called.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jul 19, 2026
Updated
Aug 13, 2026
EPSS
0.1% · 1th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
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

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

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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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel4.17 and later · before 5.10.258
  • linux linux kernel5.11 and later · before 5.15.209
  • linux linux kernel5.16 and later · before 6.1.175
  • linux linux kernel6.2 and later · before 6.6.142
  • linux linux kernel6.7 and later · before 6.12.92
  • linux linux kernel6.13 and later · before 6.18.34
  • linux linux kernel6.19 and later · before 7.0.11
  • linux linux kernel7.1

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

    • 4.17affected
    • 2734b629525a9dae5bf217cbf0a9651da93d2108 and later · before 49332e49ad5b20262cc719b03d4123b9362de701affected · git
    • 2734b629525a9dae5bf217cbf0a9651da93d2108 and later · before b559a218eece132de0c58d444877b5627cbee524affected · git
    • 2734b629525a9dae5bf217cbf0a9651da93d2108 and later · before b427e9f6d81c9341cba23ef92f860f99f830d91daffected · git
    • 2734b629525a9dae5bf217cbf0a9651da93d2108 and later · before f383cff9fb382139980bac1bcd3f3f5d59f68435affected · git
    • 2734b629525a9dae5bf217cbf0a9651da93d2108 and later · before 1a150947f8480262a46c860f1acb9c6597ca7097affected · git
    • 2734b629525a9dae5bf217cbf0a9651da93d2108 and later · before 798183376d9d3e278a270ea0e75a5769c8f145d9affected · git
    • 2734b629525a9dae5bf217cbf0a9651da93d2108 and later · before b6723339736320b2e1784258ad4490cec7aac11aaffected · git
    • 2734b629525a9dae5bf217cbf0a9651da93d2108 and later · before 8f0f5c4fb9df0e19a341e0c6ed8dc4fda9124f03affected · git
    • before 4.17not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.94-16.12.94-1
Debian:14linuxbefore 7.0.12-17.0.12-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-64171Jul 19, 2026 · i2c: tegra: fix pm_runtime leak on mutex_lock failure
    22Monitor
  • ← EarlierCVE-2026-64172Jul 19, 2026 · KVM: SVM: Disable AVIC IPI virtualization on Hygon Family 18h (erratum #1235)
    28Monitor
  • Later →CVE-2026-64174Jul 19, 2026 · wifi: cfg80211: advance loop vars in cfg80211_merge_profile()
    22Monitor

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 Linux1a150947f8480262a46c860f1acb9c6597ca7097Vendor (CNA)
Linux Linux49332e49ad5b20262cc719b03d4123b9362de701Vendor (CNA)
Linux Linux798183376d9d3e278a270ea0e75a5769c8f145d9Vendor (CNA)
Linux Linux8f0f5c4fb9df0e19a341e0c6ed8dc4fda9124f03Vendor (CNA)
Linux Linuxb427e9f6d81c9341cba23ef92f860f99f830d91dVendor (CNA)
Linux Linuxb559a218eece132de0c58d444877b5627cbee524Vendor (CNA)
Linux Linuxb6723339736320b2e1784258ad4490cec7aac11aVendor (CNA)
Linux Linuxf383cff9fb382139980bac1bcd3f3f5d59f68435Vendor (CNA)
debian:linux6.1.176-1 · 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.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

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