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NVD / CVE Program· CNA Linux

CVE-2026-46098: net: caif: clear client service pointer on teardown

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: 0.12% (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 3ac6db584d9d420267bb8413115707eeec76d9cf, 63d21a3aa0108b9dde4e99b0d3d5d679ac68c0f9, 7ef97d4675b05a103648bd9244d91dff7d8c08b0; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1.

Low priority for now. Upgrade to Linux Linux 3ac6db584d9d420267bb8413115707eeec76d9cf, 63d21a3aa0108b9dde4e99b0d3d5d679ac68c0f9, 7ef97d4675b05a103648bd9244d91dff7d8c08b0; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1 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: net: caif: clear client service pointer on teardown `caif_connect()` can tear down an existing client after remote shutdown by calling `caif_disconnect_client()` followed by `caif_free_client()`. `caif_free_client()` releases the service layer referenced by `adap_layer->dn`, but leaves that pointer stale. When the socket is later destroyed, `caif_sock_destructor()` calls `caif_free_client()` again and dereferences the freed service pointer. Clear the client/service links before releasing the service object so repeated teardown becomes harmless.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 27, 2026
Updated
Jun 25, 2026
EPSS
0.1% · 2th percentile

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 kernel3.0 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 6.6.140
  • linux linux kernel6.7 and later · before 6.12.86
  • linux linux kernel6.13 and later · before 6.18.27
  • linux linux kernel6.19 and later · before 7.0.4

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

    • 3.0affected
    • 43e3692101086add8719c3b8b50b05c9ac5b14e1 and later · before cffca7a18b8f9de7c3d3013a1f5740c412b2a501affected · git
    • 43e3692101086add8719c3b8b50b05c9ac5b14e1 and later · before 7ef97d4675b05a103648bd9244d91dff7d8c08b0affected · git
    • 43e3692101086add8719c3b8b50b05c9ac5b14e1 and later · before e16859f3f4426fa349bc5519d582a93d28f5a15daffected · git
    • 43e3692101086add8719c3b8b50b05c9ac5b14e1 and later · before 914c6456fcfc21a3d553945dff62fd1621d6155daffected · git
    • 43e3692101086add8719c3b8b50b05c9ac5b14e1 and later · before 3ac6db584d9d420267bb8413115707eeec76d9cfaffected · git
    • 43e3692101086add8719c3b8b50b05c9ac5b14e1 and later · before 63d21a3aa0108b9dde4e99b0d3d5d679ac68c0f9affected · git
    • 43e3692101086add8719c3b8b50b05c9ac5b14e1 and later · before a4b191ddc12c55ddb62feb096536f819f384d6f1affected · git
    • 43e3692101086add8719c3b8b50b05c9ac5b14e1 and later · before f7cf8ece8cee3c1ee361991470cdb1eb65ab02e8affected · git
    • before 3.0not 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 6.12.86-16.12.86-1
Debian:14linuxbefore 7.0.4-17.0.4-1

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-2026-46096May 27, 2026 · tpm2-sessions: Fix missing tpm_buf_destroy() in tpm2_read_public()
    22Monitor
  • ← EarlierCVE-2026-46097May 27, 2026 · Input: edt-ft5x06 - fix use-after-free in debugfs teardown
    31Monitor
  • Later →CVE-2026-46100May 27, 2026 · fs: afs: revert mmap_prepare() change
    31Monitor

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 Linux3ac6db584d9d420267bb8413115707eeec76d9cfVendor (CNA)
Linux Linux63d21a3aa0108b9dde4e99b0d3d5d679ac68c0f9Vendor (CNA)
Linux Linux7ef97d4675b05a103648bd9244d91dff7d8c08b0Vendor (CNA)
Linux Linux914c6456fcfc21a3d553945dff62fd1621d6155dVendor (CNA)
Linux Linuxa4b191ddc12c55ddb62feb096536f819f384d6f1Vendor (CNA)
Linux Linuxcffca7a18b8f9de7c3d3013a1f5740c412b2a501Vendor (CNA)
Linux Linuxe16859f3f4426fa349bc5519d582a93d28f5a15dVendor (CNA)
Linux Linuxf7cf8ece8cee3c1ee361991470cdb1eb65ab02e8Vendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.06.6.141.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
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.

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
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)

CWE-476 · NULL Pointer Dereference

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