CVE-2023-1670 — A flaw use after free in the Linux kernel Xircom 16-bit PCMCIA (PC-card) Etherne

A flaw use after free in the Linux kernel Xircom 16-bit PCMCIA (PC-card) Ethernet driver was found.A local user could use this flaw to crash the system or potentially escalate their privileges on the system.

01What is this vulnerability?

A flaw use after free in the Linux kernel Xircom 16-bit PCMCIA (PC-card) Ethernet driver was found.A local user could use this flaw to crash the system or potentially escalate their privileges on the system.

02Affected products

Vendor	Product	Versions
n	a / Kernel	Linux kernel 6.3-rc4

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-03-30T00:00:00.000Z
• Last modified: 2025-02-14T15:41:37.370Z

09References

• lore.kernel.org — https://lore.kernel.org/all/20230316161526.1568982-1-zyytlz.wz%40163.com/
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
• security.netapp.com — https://security.netapp.com/advisory/ntap-20230526-0010/