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NVD / CVE Program· CNA Linux

CVE-2026-80760: Bluetooth: MGMT: reject HCI_CMD_SYNC params_len above 255

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.20% (FIRST EPSS).
  • Fixed version: Linux Linux 0bd0195ce25737cbdd0eabc54319ee0ddf3a0ad2, 5d95286b6d6e8f1d304da7522bfa6860fc017e48, 6e1c44878aa3ee7336efeaf01414b030b0a5c273.

Low priority for now. Upgrade to Linux Linux 0bd0195ce25737cbdd0eabc54319ee0ddf3a0ad2, 5d95286b6d6e8f1d304da7522bfa6860fc017e48, 6e1c44878aa3ee7336efeaf01414b030b0a5c273 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: Bluetooth: MGMT: reject HCI_CMD_SYNC params_len above 255 mgmt_hci_cmd_sync() checks that the message length agrees with params_len but puts no upper bound on it. params_len is __le16 while the parameter length in the HCI command header is a u8: struct hci_command_hdr { __le16 opcode; __u8 plen; } __packed; hci_cmd_sync_alloc() assigns one to the other: hdr->plen = plen; if (plen) skb_put_data(skb, param, plen); so a params_len of 256 leaves plen at 0 while all 256 bytes are still appended. The frame handed to the driver then declares no parameters and carries 256 of them. On a length framed transport such as H:4 the controller takes the trailing bytes as the start of the next packet. The mgmt socket MTU is HCI_MAX_FRAME_SIZE, so params_len can reach about 1KB this way. Commit 03f1700b9b4d ("Bluetooth: MGMT: reject malformed HCI_CMD_SYNC commands") only made params_len agree with the message length, a value that fits the message but not the header field is still accepted. Reject params_len that does not fit the header field.

—No exploit Fix available
Published
Sep 4, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

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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

    • 6.13affected
    • 827af4787e74e8df9e8e0677a69fbb15e0856d2f and later · before b7d9edcf9fe6e9ec3a2e80ef9e8d44ef9b4f2894affected · git
    • 827af4787e74e8df9e8e0677a69fbb15e0856d2f and later · before 0bd0195ce25737cbdd0eabc54319ee0ddf3a0ad2affected · git
    • 827af4787e74e8df9e8e0677a69fbb15e0856d2f and later · before 6e1c44878aa3ee7336efeaf01414b030b0a5c273affected · git
    • 827af4787e74e8df9e8e0677a69fbb15e0856d2f and later · before 5d95286b6d6e8f1d304da7522bfa6860fc017e48affected · git
    • before 6.13not affected · semver
    • 6.18.47 and later · up to and including 6.18.*not affected · semver
    • 7.1.11 and later · up to and including 7.1.*not affected · semver
    • 7.2.1 and later · up to and including 7.2.*not affected · semver
    • 7.3 and laternot affected · original_commit_for_fix

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:14linuxbefore 7.1.12-17.1.12-1
openSUSE:Tumbleweedkernel-sourcebefore 7.2.5-1.17.2.5-1.1

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

Published before and after this one in the same product

  • ← EarlierCVE-2026-80758Sep 4, 2026 · futex: Avoid private hash use-after-free on final put
    0Monitor
  • ← EarlierCVE-2026-80759Sep 4, 2026 · Bluetooth: hci_aml: validate firmware segment lengths
    0Monitor
  • Later →CVE-2026-80761Sep 4, 2026 · Bluetooth: ISO: zero the sockaddr before returning it in getname
    0Monitor

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 Linux0bd0195ce25737cbdd0eabc54319ee0ddf3a0ad2Vendor (CNA)
Linux Linux5d95286b6d6e8f1d304da7522bfa6860fc017e48Vendor (CNA)
Linux Linux6e1c44878aa3ee7336efeaf01414b030b0a5c273Vendor (CNA)
Linux Linuxb7d9edcf9fe6e9ec3a2e80ef9e8d44ef9b4f2894Vendor (CNA)
debian:linux7.1.12-1 · Debian:14Package registry (OSV)
opensuse:kernel-source7.2.5-1.1 · openSUSE:TumbleweedPackage 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

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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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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✗ → ✓

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References

Show all references (3 more)

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

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