CVE-2026-1678

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Source
https://cve.org/CVERecord?id=CVE-2026-1678
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1678.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-1678
Aliases
  • GHSA-536f-h63g-hj42
Published
2026-03-05T06:21:36.907Z
Modified
2026-07-15T01:48:52.693296278Z
Severity
  • 9.4 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H CVSS Calculator
Summary
dns: memory‑safety issue in the DNS name parser
Details

dnsunpackname() caches the buffer tailroom once and reuses it while appending DNS labels. As the buffer grows, the cached size becomes incorrect, and the final null terminator can be written past the buffer. With assertions disabled (default), a malicious DNS response can trigger an out-of-bounds write when CONFIGDNSRESOLVER is enabled.

Database specific 
{
    "cna_assigner": "zephyr",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1678.json",
    "cwe_ids": [
        "CWE-787"
    ]
}
References

Affected packages

Git / github.com/zephyrproject-rtos/zephyr

Affected ranges

Type
GIT
Repo
https://github.com/zephyrproject-rtos/zephyr
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
3568e1b6d5cdd51a6b964a2a1d6d29200fea2056
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "*"
        },
        {
            "last_affected": "4.3"
        }
    ]
}

Affected versions

v1.*
v1.0.0
v1.1.0
v1.1.0-rc1
v1.10.0
v1.10.0-rc1
v1.10.0-rc2
v1.10.0-rc3
v1.11.0
v1.11.0-rc1
v1.11.0-rc2
v1.11.0-rc3
v1.12.0
v1.12.0-rc1
v1.12.0-rc2
v1.12.0-rc3
v1.13.0
v1.13.0-rc1
v1.13.0-rc2
v1.13.0-rc3
v1.14.0
v1.14.0-rc1
v1.14.0-rc2
v1.14.0-rc3
v1.2.0
v1.2.0-rc1
v1.2.0-rc2
v1.3.0
v1.3.0-rc1
v1.3.0-rc2
v1.4.0
v1.4.0-rc1
v1.4.0-rc2
v1.4.0-rc3
v1.5.0
v1.5.0-rc0
v1.5.0-rc1
v1.5.0-rc2
v1.5.0-rc3
v1.5.0-rc4
v1.6.99
v1.7.99
v1.8.99
v1.9.0
v1.9.0-rc1
v1.9.0-rc2
v1.9.0-rc3
v1.9.0-rc4
v2.*
v2.0.0
v2.0.0-rc1
v2.0.0-rc2
v2.0.0-rc3
v2.1.0
v2.1.0-rc1
v2.1.0-rc2
v2.1.0-rc3
v2.2.0
v2.2.0-rc1
v2.2.0-rc2
v2.2.0-rc3
v2.3.0
v2.3.0-rc1
v2.3.0-rc2
v2.4.0
v2.4.0-rc1
v2.4.0-rc2
v2.4.0-rc3
v2.5.0
v2.5.0-rc1
v2.5.0-rc2
v2.5.0-rc3
v2.5.0-rc4
v2.6.0
v2.6.0-rc1
v2.6.0-rc2
v2.6.0-rc3
v2.7.0-rc1
v2.7.0-rc2
v2.7.0-rc3
v2.7.99
v3.*
v3.0.0
v3.0.0-rc1
v3.0.0-rc2
v3.0.0-rc3
v3.1.0
v3.1.0-rc1
v3.1.0-rc2
v3.1.0-rc3
v3.2.0
v3.2.0-rc1
v3.2.0-rc2
v3.2.0-rc3
v3.3.0
v3.3.0-rc1
v3.3.0-rc2
v3.3.0-rc3
v3.4.0
v3.4.0-rc1
v3.4.0-rc2
v3.4.0-rc3
v3.5.0
v3.5.0-rc1
v3.5.0-rc2
v3.5.0-rc3
v3.6.0
v3.6.0-rc1
v3.6.0-rc2
v3.6.0-rc3
v3.7.0
v3.7.0-rc1
v3.7.0-rc2
v3.7.0-rc3
v4.*
v4.0.0
v4.0.0-rc1
v4.0.0-rc2
v4.0.0-rc3
v4.1.0
v4.1.0-rc1
v4.1.0-rc2
v4.1.0-rc3
v4.2.0
v4.2.0-rc1
v4.2.0-rc2
v4.2.0-rc3
v4.3.0
v4.3.0-rc1
v4.3.0-rc2
v4.3.0-rc3
zephyr-v1.*
zephyr-v1.0.0
zephyr-v1.1.0
zephyr-v1.10.0
zephyr-v1.11.0
zephyr-v1.12.0
zephyr-v1.13.0
zephyr-v1.14.0
zephyr-v1.2.0
zephyr-v1.3.0
zephyr-v1.4.0
zephyr-v1.5.0
zephyr-v1.9.0
zephyr-v2.*
zephyr-v2.0.0
zephyr-v2.1.0
zephyr-v2.2.0
zephyr-v2.3.0
zephyr-v2.4.0
zephyr-v2.5.0
zephyr-v2.6.0
zephyr-v3.*
zephyr-v3.0.0
zephyr-v3.1.0
zephyr-v3.2.0
zephyr-v3.3.0
zephyr-v3.4.0
zephyr-v3.5.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1678.json"