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NVD / CVE Program· CNA Linux

CVE-2026-64000: net: hsr: fix potential OOB access in supervision frame handling

Noroxi assessment

Priority: Monitor (action score 39/100)

  • 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: 0.49% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Linux Linux 09a37dca090c55ffb1a33f52d8667f1c2367ef48, 71c986c0ba45b7dc574fae27c83e7b6671556f37, 78607a6854a22a2502f68092202e75a39af4865d.

Low priority for now. Upgrade to Linux Linux 09a37dca090c55ffb1a33f52d8667f1c2367ef48, 71c986c0ba45b7dc574fae27c83e7b6671556f37, 78607a6854a22a2502f68092202e75a39af4865d 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: hsr: fix potential OOB access in supervision frame handling Ensure the entire TLV header is linearized before access by adding sizeof(struct hsr_sup_tlv) to the pskb_may_pull() calls. Without this, a truncated frame could cause an out-of-bounds access.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Jul 19, 2026
Updated
Oct 19, 2026
EPSS
0.4% · 42th percentile

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
9.8
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.

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 kernel5.16 and later · before 6.1.176
  • linux linux kernel6.2 and later · before 6.6.143
  • linux linux kernel6.7 and later · before 6.12.93
  • linux linux kernel6.13 and later · before 6.18.35
  • linux linux kernel6.19 and later · before 7.0.12
  • 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

    • 5.16affected
    • eafaa88b3eb7f28aecb222281655473431d3ef2e and later · before 09a37dca090c55ffb1a33f52d8667f1c2367ef48affected · git
    • eafaa88b3eb7f28aecb222281655473431d3ef2e and later · before a4b64f3e9c7b8259f7dd251a0313420ba7c01852affected · git
    • eafaa88b3eb7f28aecb222281655473431d3ef2e and later · before 71c986c0ba45b7dc574fae27c83e7b6671556f37affected · git
    • eafaa88b3eb7f28aecb222281655473431d3ef2e and later · before fbd0662f9c9a66e8cc3df3099cca8ed6d3837cc7affected · git
    • eafaa88b3eb7f28aecb222281655473431d3ef2e and later · before 78607a6854a22a2502f68092202e75a39af4865daffected · git
    • eafaa88b3eb7f28aecb222281655473431d3ef2e and later · before f229426072fc865654a60978bb7fda790a051ff3affected · git
    • before 5.16not affected · semver
    • 6.1.176 and later · up to and including 6.1.*not affected · semver
    • 6.6.143 and later · up to and including 6.6.*not 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
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_16before 15-150600.2.115-150600.2.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_21before 10-150600.2.110-150600.2.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_29before 4-150600.2.14-150600.2.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_30before 3-150600.2.13-150600.2.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7_Update_18before 5-150700.2.15-150700.2.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7_Update_19before 4-150700.2.14-150700.2.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7_Update_20before 3-150700.2.13-150700.2.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7_Update_4before 18-150700.2.118-150700.2.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7_Update_7before 13-150700.2.113-150700.2.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7-RT_Update_13before 8-150700.2.18-150700.2.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7-RT_Update_19before 3-150700.2.13-150700.2.1
SUSE:Linux Micro 6.1kernel-livepatch-MICRO-6-0_Update_11before 17-1.117-1.1
SUSE:Linux Micro 6.1kernel-livepatch-MICRO-6-0_Update_12before 17-1.117-1.1
SUSE:Linux Micro 6.1kernel-livepatch-MICRO-6-0_Update_13before 15-1.115-1.1
SUSE:Linux Micro 6.1kernel-livepatch-MICRO-6-0_Update_14before 13-1.213-1.2
SUSE:Linux Micro 6.1kernel-livepatch-MICRO-6-0_Update_16before 12-1.112-1.1
SUSE:Linux Micro 6.1kernel-livepatch-MICRO-6-0_Update_17before 11-1.111-1.1
SUSE:Linux Micro 6.1kernel-livepatch-MICRO-6-0_Update_18before 10-1.110-1.1
SUSE:Linux Micro 6.1kernel-livepatch-MICRO-6-0_Update_19before 8-1.18-1.1
SUSE:Linux Micro 6.1kernel-livepatch-MICRO-6-0_Update_20before 7-1.17-1.1
SUSE:Linux Micro 6.1kernel-livepatch-MICRO-6-0_Update_21before 7-1.17-1.1

+56

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-2026-63998Jul 19, 2026 · ethtool: module: call ethnl_ops_complete() on module flash errors
    22Monitor
  • ← EarlierCVE-2026-63999Jul 19, 2026 · ethtool: rss: fix indir_table and hkey leak on get_rxfh failure
    22Monitor
  • Later →CVE-2026-64001Jul 19, 2026 · ALSA: pcm: oss: Fix setup list UAF on proc write error
    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 Linux09a37dca090c55ffb1a33f52d8667f1c2367ef48Vendor (CNA)
Linux Linux71c986c0ba45b7dc574fae27c83e7b6671556f37Vendor (CNA)
Linux Linux78607a6854a22a2502f68092202e75a39af4865dVendor (CNA)
Linux Linuxa4b64f3e9c7b8259f7dd251a0313420ba7c01852Vendor (CNA)
Linux Linuxf229426072fc865654a60978bb7fda790a051ff3Vendor (CNA)
Linux Linuxfbd0662f9c9a66e8cc3df3099cca8ed6d3837cc7Vendor (CNA)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6_Update_1615-150600.2.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6_Update_2110-150600.2.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6_Update_294-150600.2.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6_Update_303-150600.2.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7_Update_185-150700.2.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7_Update_194-150700.2.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7_Update_203-150700.2.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7_Update_418-150700.2.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7_Update_713-150700.2.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7-RT_Update_138-150700.2.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7-RT_Update_193-150700.2.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE16-RT_Update_108-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-livepatch-SLE16-RT_Update_118-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-livepatch-SLE16-RT_Update_126-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-livepatch-SLE16-RT_Update_136-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-livepatch-SLE16-RT_Update_146-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-livepatch-SLE16-RT_Update_154-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-livepatch-SLE16-RT_Update_163-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-livepatch-SLE16-RT_Update_512-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-livepatch-SLE16-RT_Update_611-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-livepatch-SLE16-RT_Update_710-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-livepatch-SLE16-RT_Update_89-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-livepatch-SLE16-RT_Update_98-160000.1.1 · SUSE:Linux Micro 6.2Package 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

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • 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
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/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.

ATT&CK techniques

—

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

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

References

Show all references (5 more)

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

All records