CVE-2021-32421: dpic 2021.01.01 has a Heap Use-After-Free in thedeletestringbox() function in dpic.y.

This month

HIGH 7.5REMOTEDOWNGRADE

CVE-2021-32421 is a high-severity flaw (CVSS 7.5) affecting dpic. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

dpic 2021.01.01 has a Heap Use-After-Free in thedeletestringbox() function in dpic.y.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-416
Published	2023-08-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dpic project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-08-22 19:16 UTCPublished CVE record published
2026-06-17 03:52 UTCUpdated Record last modified

dpic project dpic DOWNGRADE

Affected: 2021-01-01

Fixed in: no fixed release known

Safe to downgrade to: a release before 2021-01-01

1. Check installed version

apt-cache policy dpic || rpm -q dpic || dpic --version

2. No fixed release: DOWNGRADE to a release before 2021-01-01 (Debian / Ubuntu)

apt-cache madison dpic sudo apt install dpic=<VERSION_BEFORE_2021-01-01> sudo apt-mark hold dpic

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list dpic sudo dnf downgrade dpic-<VERSION_BEFORE_2021-01-01> sudo dnf versionlock add dpic

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-32421?

dpic: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-32421 being exploited?

CVE-2021-32421 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-32421 affect?

CVE-2021-32421 affects dpic. Severity is high (CVSS 7.5). dpic 2021.01.01 has a Heap Use-After-Free in thedeletestringbox() function in dpic.y.

How urgent is CVE-2021-32421?

Priority 45/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-33390 CRITICAL 9.8 DOWNGRADE dpic 2021.04.10 has a use-after-free in thedeletestringbox() function in dpic.y
CVE-2021-33388 CRITICAL 9.8 DOWNGRADE dpic 2021.04.10 has a Heap Buffer Overflow in themakevar() function in dpic.y
CVE-2021-32422 HIGH 7.5 DOWNGRADE dpic 2021.01.01 has a Global buffer overflow in theyylex() function in main.c and reads out of the bound array
CVE-2021-32420 HIGH 7.5 DOWNGRADE dpic 2021.01.01 has a Heap-based Buffer Overflow in thestorestring function in dpic.y.

References

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