vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2021-33910

MEDIUM
5.5
CVSS Score
Published: July 20, 2021 at 06:13 PM UTC
Updated: October 14, 2026 at 12:17 PM UTC
6 products affected across 5 vendorsDebian LinuxFedoraSolidfire

Using N/A by N/A?

Get instant alerts when new vulnerabilities affect N/A - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.5
Exploit prediction
EPSS 9%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.0
Fedora· Fedora Projectrpm
95%
3334
Hci Management Node· NetApp
95%
All versions
Solidfire· NetApp
95%
All versions
Systemd· Systemd Project
95%
v < 246.15247 ≤ v < 247.8248 ≤ v < 248.5249 ≤ v < 249.1
Affected range stops below 246.15, so it looks safe — our inference, not a vendor statement
Affected range stops below 247.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 248.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 249.1, so it looks safe — our inference, not a vendor statement
Systemd· Systemd
54%
All versions

References (19)

x_refsource_MISCExploitThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html
Mailing Listx_refsource_MLISTPatchThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/08/04/2
Mailing Listx_refsource_MLISTPatchThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/08/17/3
Mailing Listx_refsource_MLISTPatchThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/09/07/3
x_refsource_CONFIRM
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/systemd/systemd-stable/commit/4a1c5f34bd3e1daed4490e9d97918e504d19733b
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/systemd/systemd-stable/commit/764b74113e36ac5219a4b82a05f311b5a92136ce
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/systemd/systemd-stable/commit/b00674347337b7531c92fdb65590ab253bb57538

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-770

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card