How to Fix CVE-2026-42485: n/a (Bundle Sibling)
By Sai Kiran Pandrala
Last verified: 2026-05-25
CVE-2026-42485 is a sibling vulnerability in the same vendor advisory as CVE-2026-37530. Applying the patched build named in the primary write-up closes this CVE as well.
| Severity | CVSS 7.5 - High |
|---|---|
| Actively exploited? | Not currently in CISA KEV |
| Affected | Same as the bundle - see CVE-2026-37530 |
| Fixed in | Same patched build as CVE-2026-37530 (See vendor advisory) |
| Type (CWE) | n/a |
What's different about CVE-2026-42485?
AGL agl-service-can-low-level contains a stack buffer overflow in the uds-c library. The send_diagnostic_request function in uds.c allocates a 6-byte stack buffer (MAX_DIAGNOSTIC_PAYLOAD_SIZE=6) but copies up to 7 bytes (MAX_UDS_REQUEST_PAYLOAD_LENGTH=7) via memcpy at an offset of 1+pid_length (2-3 bytes), resulting in 1-4 bytes of controlled stack overflow. The payload_length field (uint8_t) has no bounds check against the destination buffer. On 32-bit ARM automotive ECUs without stack canaries, this can lead to return address overwrite and RCE.
The technical impact and remediation are identical to the primary CVE in the bundle. The same vendor patch closes both.
How to fix CVE-2026-42485
Apply the patched build per the primary write-up: How to Fix CVE-2026-37530.
The patch installation procedure, verification commands, and interim mitigations are documented there. Reusing one runbook keeps the rollout consistent across the bundle.
Frequently asked questions
Is CVE-2026-42485 fixed by the same patch as CVE-2026-37530?
Yes. CVE-2026-42485 ships in the same vendor advisory as CVE-2026-37530. Applying the patched build named in the primary write-up closes both.
What is the CVSS score for CVE-2026-42485?
The CVSS base score is 7.5 (High).
Is it being exploited?
It is not currently listed in CISA KEV.
References
- Official vendor advisory: https://gerrit.automotivelinux.org/gerrit/apps/agl-service-can-low-level
- NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2026-42485
- CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- Primary write-up: How to Fix CVE-2026-37530
*Part of the n/a bundle. Full procedure at CVE-2026-37530.*