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CVE-2026-64005· NVD / CVE Program· CNA Linux

net/smc: Do not re-initialize smc hashtables

In the Linux kernel, the following vulnerability has been resolved: net/smc: Do not re-initialize smc hashtables INIT_HLIST_HEAD(&smc_v*_hashinfo.ht) are called after smc_nl_init(), proto_register() and sock_register(). This can lead to smc_v*_hashinfo.ht being reset even though hash entries already exist and are being used, possibly resulting in a corrupted list. Remove unnecessary and dangerous re-initialisation of smc_v*_hashinfo.ht in smc_init(); it is implicitly initialised to zero anyhow. Add HLIST_HEAD_INIT to the definitions for clarity.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Jul 19, 2026
Updated
Aug 5, 2026
EPSS
0.1% · 2th percentile
CWE
—
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Report tools

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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.

Affected systems

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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

    • 4.11affected
    • f16a7dd5cf27eeda187425c9c7d96802a549f9c4 and later · before cdc79c05cc375f68ae87b0c74fdaac1a5c93155aaffected · git
    • f16a7dd5cf27eeda187425c9c7d96802a549f9c4 and later · before 2006605006e5a4a11d93e1ebdbbe95764d24276faffected · git
    • f16a7dd5cf27eeda187425c9c7d96802a549f9c4 and later · before 64c96e497d5ada0b90e99bf58f893aa2b73dcfbcaffected · git
    • f16a7dd5cf27eeda187425c9c7d96802a549f9c4 and later · before ed7a758313011885347b854e97cb95903ef3c3f7affected · git
    • f16a7dd5cf27eeda187425c9c7d96802a549f9c4 and later · before 0cc9d0ac22d02f1ba1884de5d6de9eaf8b45d82daffected · git
    • f16a7dd5cf27eeda187425c9c7d96802a549f9c4 and later · before 55cba6b883b41e5922c00ba9d4e3262131f46f1baffected · git
    • f16a7dd5cf27eeda187425c9c7d96802a549f9c4 and later · before 5ec939367e700722ffbb1b7cacccbb1a3cf0ebd1affected · git
    • f16a7dd5cf27eeda187425c9c7d96802a549f9c4 and later · before 9e4389b0038781f19f97895186ed941ff8ac1678affected · git
    • before 4.11not 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-2026-74705udp: 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
  • CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
    40Plan
  • CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan

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 Linux0cc9d0ac22d02f1ba1884de5d6de9eaf8b45d82dVendor (CNA)
Linux Linux2006605006e5a4a11d93e1ebdbbe95764d24276fVendor (CNA)
Linux Linux55cba6b883b41e5922c00ba9d4e3262131f46f1bVendor (CNA)
Linux Linux5ec939367e700722ffbb1b7cacccbb1a3cf0ebd1Vendor (CNA)
Linux Linux64c96e497d5ada0b90e99bf58f893aa2b73dcfbcVendor (CNA)
Linux Linux9e4389b0038781f19f97895186ed941ff8ac1678Vendor (CNA)
Linux Linuxcdc79c05cc375f68ae87b0c74fdaac1a5c93155aVendor (CNA)
Linux Linuxed7a758313011885347b854e97cb95903ef3c3f7Vendor (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.

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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)

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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.

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

  1. Fix✗ → ✓

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

References

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

All records