CVE-2019-12067 — The ahci_commit_buf function in ide/ahci

The ahci_commit_buf function in ide/ahci.c in QEMU allows attackers to cause a denial of service (NULL dereference) when the command header 'ad->cur_cmd' is null.

01What is this vulnerability?

The ahci_commit_buf function in ide/ahci.c in QEMU allows attackers to cause a denial of service (NULL dereference) when the command header 'ad->cur_cmd' is null.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

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: 2021-06-02T14:18:09.000Z
• Last modified: 2024-08-04T23:10:30.106Z

09References

• lists.gnu.org — https://lists.gnu.org/archive/html/qemu-devel/2019-08/msg01358.html
• lists.gnu.org — https://lists.gnu.org/archive/html/qemu-devel/2019-08/msg01487.html
• bugzilla.suse.com — https://bugzilla.suse.com/show_bug.cgi?id=1145642
• security-tracker.debian.org — https://security-tracker.debian.org/tracker/CVE-2019-12067
• security.netapp.com — https://security.netapp.com/advisory/ntap-20210727-0001/