CVE-2019-19077 — A memory leak in the bnxt_re_create_srq() function in drivers/infiniband/hw/bnxt

A memory leak in the bnxt_re_create_srq() function in drivers/infiniband/hw/bnxt_re/ib_verbs.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering copy to udata failures, aka CID-4a9d46a9fe14.

01What is this vulnerability?

A memory leak in the bnxt_re_create_srq() function in drivers/infiniband/hw/bnxt_re/ib_verbs.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering copy to udata failures, aka CID-4a9d46a9fe14.

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: 2019-11-18T05:24:25.000Z
• Last modified: 2024-08-05T02:09:38.721Z

09References

• github.com — https://github.com/torvalds/linux/commit/4a9d46a9fe14401f21df69cea97c62396d5fb05…
• security.netapp.com — https://security.netapp.com/advisory/ntap-20191205-0001/
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html
• usn.ubuntu.com — https://usn.ubuntu.com/4258-1/
• usn.ubuntu.com — https://usn.ubuntu.com/4284-1/