What’s Vulnerable › Vulnerabilities

CVE-2019-19065

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-11-18 · updated 2026-06-17
• Weakness: CWE-401

Description

A memory leak in the sdma_init() function in drivers/infiniband/hw/hfi1/sdma.c in the Linux kernel before 5.3.9 allows attackers to cause a denial of service (memory consumption) by triggering rhashtable_init() failures, aka CID-34b3be18a04e. NOTE: This has been disputed as not a vulnerability because "rhashtable_init() can only fail if it is passed invalid values in the second parameter's struct, but when invoked from sdma_init() that is a pointer to a static const struct, so an attacker could only trigger failure if they could corrupt kernel memory (in which case a small memory leak is not a significant problem).

Affected products

• Canonical Ubuntu Linux: 16.04, 18.04, 19.04, 19.10
• Linux kernel: before 5.3.9 — fixed in 5.3.9
• openSUSE Leap: 15.1

How to fix

Upgrade to a fixed version: Linux kernel 5.3.9. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.9
• https://github.com/torvalds/linux/commit/34b3be18a04ecdc610aae4c48e5d1b799d8689f6
• https://security.netapp.com/advisory/ntap-20191205-0001/
• https://usn.ubuntu.com/4208-1/
• https://usn.ubuntu.com/4210-1/
• https://usn.ubuntu.com/4226-1/
• http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.9
• https://github.com/torvalds/linux/commit/34b3be18a04ecdc610aae4c48e5d1b799d8689f6
• https://security.netapp.com/advisory/ntap-20191205-0001/
• https://usn.ubuntu.com/4208-1/

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