01 Record
CVE-2026-19938
Use-after-free of an ATT PDU buffer when signing an outgoing Bluetooth ATT Signed Write Command fails
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
Use-after-free of an ATT PDU buffer when signing an outgoing Bluetooth ATT Signed Write Command fails
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.
- EPSS probability
- 0.16% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 4.9% 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 2026-10-14.
- 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
- 2026-10-12 23:19Z16 DAYS AGO
- Last updated
- 2026-10-14 19:17Z14 DAYS AGO
- Reserved
- 2026-08-15
- 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
- CWE-416Use After FreeVariant
- Data version
- 5.2
- Document digest
- ac4c183be57a1a953e2744ecca9ca9d0f9a8d6b804439f803067d278390a78a1
05 Affected products
VendorProductVersionsPlatforms
06 References
- github.comFix commithttps://github.com/zephyrproject-rtos/zephyr/commit/ba8627d91c8ce15c26224cbc7f7f92bb66f56b03
- github.comGHSA-p3r4-qw98-j59mhttps://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-p3r4-qw98-j59m