What is CVE-2021-33910?

CVE-2021-33910 is a medium-severity vulnerability in NetApp Hci Management Node, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.5/10. Published 2021-07-20.

How severe is CVE-2021-33910?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2021-33910 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in NetApp Hci Management Node

CVE-2021-33910

basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash.

Published 2021-07-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.088 (95.0th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.088 · newest: 0.088 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

Public proof-of-concept exploits

References

github.com/systemd/systemd/pull/20256/commits/441e0115646d54f080e5c3bb0ba477c89… (Patch, Third Party Advisory)
www.openwall.com/lists/oss-security/2021/07/20/2 (Exploit, Mailing List, Third Party Advisory)
security.gentoo.org/glsa/202107-48 (vendor-advisory, Third Party Advisory)
www.debian.org/security/2021/dsa-4942 (vendor-advisory, Third Party Advisory)
packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-L… (Exploit, VDB Entry, Third Party Advisory)
github.com/systemd/systemd/commit/b34a4f0e6729de292cb3b0c03c1d48f246ad896b (Patch, Third Party Advisory)
github.com/systemd/systemd-stable/commit/cfd14c65374027b34dbbc4f0551456c5dc2d1f… (Patch, Third Party Advisory)
github.com/systemd/systemd-stable/commit/b00674347337b7531c92fdb65590ab253bb575… (Patch, Third Party Advisory)
github.com/systemd/systemd-stable/commit/4a1c5f34bd3e1daed4490e9d97918e504d1973… (Patch, Third Party Advisory)
github.com/systemd/systemd-stable/commit/764b74113e36ac5219a4b82a05f311b5a92136… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-33910?: CVE-2021-33910 is a medium-severity vulnerability in NetApp Hci Management Node, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.5/10. Published 2021-07-20.
How severe is CVE-2021-33910?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2021-33910 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.