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01 Record

CVE-2026-11893

Double free / use-after-free in Bouffalo Lab HCI driver send() error paths (hci_bflb)

MediumPUBLISHEDCNA: zephyr
CNA base score5.9 CVSS v3.xCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

02 Description

Double free / use-after-free in Bouffalo Lab HCI driver send() error paths (hci_bflb)

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.24% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 15.7% of scored records. A rank, not a probability.
NVD base score
5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-10-23.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-08-11 04:42Z2 MO AGO
Last updated
2026-08-11 17:06Z2 MO AGO
Reserved
2026-06-10
Assigning CNA
zephyr
Record state
PUBLISHED
Severity
Medium (CVSS 5.9)
CNA CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Weaknesses
Data version
5.2
Document digest
0c1443e2a2d32ed793d0fed0af79d6cc91a1b3a4a1b960a84f0fbe31c1a0c3b6

05 Affected products

VendorProductVersionsPlatforms
zephyrprojectzephyr4.4.0 to < 4.4.2—

06 References