CVE-2019-18814 — An issue was discovered in the Linux kernel through 5

An issue was discovered in the Linux kernel through 5.3.9. There is a use-after-free when aa_label_parse() fails in aa_audit_rule_init() in security/apparmor/audit.c.

01What is this vulnerability?

An issue was discovered in the Linux kernel through 5.3.9. There is a use-after-free when aa_label_parse() fails in aa_audit_rule_init() in security/apparmor/audit.c.

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: 2019-11-07T15:28:46.000Z
• Last modified: 2024-08-05T02:02:39.654Z

09References

• lore.kernel.org — https://lore.kernel.org/patchwork/patch/1142523/
• support.f5.com — https://support.f5.com/csp/article/K21561554?utm_source=f5support&amp%3Butm_medi…
• security.netapp.com — https://security.netapp.com/advisory/ntap-20191205-0001/
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/08/msg00019.html