CVE-2022-44315: PicoC Version 3.2.2 was discovered to contain a heap buffer overflow in the ExpressionAssign function in expre

Routine

MEDIUM 5.5DOWNGRADE

CVE-2022-44315 is a medium-severity flaw (CVSS 5.5) affecting picoc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PicoC Version 3.2.2 was discovered to contain a heap buffer overflow in the ExpressionAssign function in expression.c when called from ExpressionParseFunctionCall.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-787
Published	2022-11-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: picoc project

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

Am I affected?

Timeline

2022-11-08 15:15 UTCPublished CVE record published
2026-06-17 05:08 UTCUpdated Record last modified

picoc project picoc DOWNGRADE

Affected: 3.2.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.2.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.2.2 (Debian / Ubuntu)

apt-cache madison picoc sudo apt install picoc=<VERSION_BEFORE_3.2.2> sudo apt-mark hold picoc

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

dnf --showduplicates list picoc sudo dnf downgrade picoc-<VERSION_BEFORE_3.2.2> sudo dnf versionlock add picoc

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-2022-44315?

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

Is CVE-2022-44315 being exploited?

CVE-2022-44315 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-2022-44315 affect?

CVE-2022-44315 affects picoc. Severity is medium (CVSS 5.5). PicoC Version 3.2.2 was discovered to contain a heap buffer overflow in the ExpressionAssign function in expression.c when called from ExpressionParseFunctionCall.

How urgent is CVE-2022-44315?

Priority 31/100. Public exploit reference

Related CVEs

CVE-2022-44321 MEDIUM 5.5 DOWNGRADE PicoC Version 3.2.2 was discovered to contain a heap buffer overflow in the LexSkipComment function in lex.c w
CVE-2022-44320 MEDIUM 5.5 DOWNGRADE PicoC Version 3.2.2 was discovered to contain a heap buffer overflow in the ExpressionCoerceFP function in exp
CVE-2022-44319 MEDIUM 5.5 DOWNGRADE PicoC Version 3.2.2 was discovered to contain a heap buffer overflow in the StdioBasePrintf function in cstdli
CVE-2022-44318 MEDIUM 5.5 DOWNGRADE PicoC Version 3.2.2 was discovered to contain a heap buffer overflow in the StringStrcat function in cstdlib/s
CVE-2022-44317 MEDIUM 5.5 DOWNGRADE PicoC Version 3.2.2 was discovered to contain a heap buffer overflow in the StdioOutPutc function in cstdlib/s

References

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