CVE-2019-19054 — A memory leak in the cx23888_ir_probe() function in drivers/media/pci/cx23885/cx

A memory leak in the cx23888_ir_probe() function in drivers/media/pci/cx23885/cx23888-ir.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering kfifo_alloc() failures, aka CID-a7b2df76b42b.

01What is this vulnerability?

A memory leak in the cx23888_ir_probe() function in drivers/media/pci/cx23885/cx23888-ir.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering kfifo_alloc() failures, aka CID-a7b2df76b42b.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

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: 2019-11-18T06:15:11.967
• Last modified: 2026-10-08T21:17:17.700

09References

• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
• github.com — https://github.com/torvalds/linux/commit/a7b2df76b42bdd026e3106cf2ba97db41345a17…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• security.netapp.com — https://security.netapp.com/advisory/ntap-20191205-0001/
• usn.ubuntu.com — https://usn.ubuntu.com/4525-1/
• usn.ubuntu.com — https://usn.ubuntu.com/4526-1/
• usn.ubuntu.com — https://usn.ubuntu.com/4527-1/
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
• github.com — https://github.com/torvalds/linux/commit/a7b2df76b42bdd026e3106cf2ba97db41345a17…