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NVD / CVE Program· CNA Linux

CVE-2026-64174: wifi: cfg80211: advance loop vars in cfg80211_merge_profile()

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 1343a480f84b80c1249133a90ef87f8751d65cbb, 1ced0f5a851f9cae274545a42a06c459b7fd8881, 5817e1e5205498a5df66eba2b34e817f4210fd0f.

Low priority for now. Upgrade to Linux Linux 1343a480f84b80c1249133a90ef87f8751d65cbb, 1ced0f5a851f9cae274545a42a06c459b7fd8881, 5817e1e5205498a5df66eba2b34e817f4210fd0f 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: wifi: cfg80211: advance loop vars in cfg80211_merge_profile() cfg80211_merge_profile() reassembles a Multi-BSSID non-transmitted BSS profile that has been split across multiple consecutive MBSSID elements. Its while-loop calls cfg80211_get_profile_continuation(ie, ielen, mbssid_elem, sub_elem) but never advances mbssid_elem or sub_elem inside the body. Each iteration therefore searches for a continuation that follows the same fixed pair; the helper returns the same next_mbssid; and the same next_sub bytes are memcpy()'d into merged_ie at a growing offset until the buffer fills. Advance both mbssid_elem and sub_elem to the just-consumed continuation so the next call to cfg80211_get_profile_continuation() searches for a further continuation beyond it (or returns NULL when none exists). A specially-crafted malicious beacon can take advantage of this bug to cause the kernel to spend an excessive amount of time in cfg80211_merge_profile (up to as much as 2ms per beacon received), which could theoretically be abused in some way.

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%

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  • 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?

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 kernel5.2 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

    • 5.2affected
    • fe806e4992c9047affd263bcc13b2c047029a726 and later · before 5817e1e5205498a5df66eba2b34e817f4210fd0faffected · git
    • fe806e4992c9047affd263bcc13b2c047029a726 and later · before cedbb608494ba1e7a5c6c56b7f1d3fd470094f28affected · git
    • fe806e4992c9047affd263bcc13b2c047029a726 and later · before c0bc4c8bd556cbe036a5b9ed333c0aab9aadfcb8affected · git
    • fe806e4992c9047affd263bcc13b2c047029a726 and later · before 1ced0f5a851f9cae274545a42a06c459b7fd8881affected · git
    • fe806e4992c9047affd263bcc13b2c047029a726 and later · before 67915715fd3874057457363c87c63e18829527dfaffected · git
    • fe806e4992c9047affd263bcc13b2c047029a726 and later · before 6cfae4914439878b8acb35c7e3b40096eeb2ad9caffected · git
    • fe806e4992c9047affd263bcc13b2c047029a726 and later · before 1343a480f84b80c1249133a90ef87f8751d65cbbaffected · git
    • fe806e4992c9047affd263bcc13b2c047029a726 and later · before 7666dbb1bacc4ba522b96740cba7283d243d16e1affected · git
    • before 5.2not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:9kernelbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64kbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64k-corebefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64k-debugbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64k-debug-corebefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64k-debug-develbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64k-debug-devel-matchedbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64k-debug-modulesbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64k-debug-modules-corebefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64k-debug-modules-extrabefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64k-develbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64k-devel-matchedbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64k-modulesbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64k-modules-corebefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-64k-modules-extrabefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-abi-stablelistsbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-corebefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-cross-headersbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-debugbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-debug-corebefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-debug-develbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-debug-devel-matchedbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-debug-modulesbefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8
AlmaLinux:9kernel-debug-modules-corebefore 5.14.0-687.49.1.el9_85.14.0-687.49.1.el9_8

+96

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-2026-64172Jul 19, 2026 · KVM: SVM: Disable AVIC IPI virtualization on Hygon Family 18h (erratum #1235)
    28Monitor
  • ← EarlierCVE-2026-64173Jul 19, 2026 · tracing: Do not call map->ops->elt_free() if elt_alloc() fails
    22Monitor
  • Later →CVE-2026-64177Jul 19, 2026 · phonet/pep: disable BH around forwarded sk_receive_skb()
    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 Linux1343a480f84b80c1249133a90ef87f8751d65cbbVendor (CNA)
Linux Linux1ced0f5a851f9cae274545a42a06c459b7fd8881Vendor (CNA)
Linux Linux5817e1e5205498a5df66eba2b34e817f4210fd0fVendor (CNA)
Linux Linux67915715fd3874057457363c87c63e18829527dfVendor (CNA)
Linux Linux6cfae4914439878b8acb35c7e3b40096eeb2ad9cVendor (CNA)
Linux Linux7666dbb1bacc4ba522b96740cba7283d243d16e1Vendor (CNA)
Linux Linuxc0bc4c8bd556cbe036a5b9ed333c0aab9aadfcb8Vendor (CNA)
Linux Linuxcedbb608494ba1e7a5c6c56b7f1d3fd470094f28Vendor (CNA)
almalinux:kernel5.14.0-687.49.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-687.49.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-687.49.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-687.49.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-687.49.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-687.49.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-687.49.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-687.49.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-687.49.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-687.49.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-687.49.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel-matched5.14.0-687.49.1.el9_8 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-687.49.1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+4

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