CVE-2023-32571: Dynamic Linq 1.0.7.10 through 1.2.25 before 1.3.0 allows attackers to execute arbitrary code and commands when

Q: How do I fix CVE-2023-32571?

linq: upgrade to newer than 1.2.25. Exact commands for each OS are on this page.

Q: Is CVE-2023-32571 being exploited?

CVE-2023-32571 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-32571 affect?

CVE-2023-32571 affects linq. Severity is critical (CVSS 9.8). Dynamic Linq 1.0.7.10 through 1.2.25 before 1.3.0 allows attackers to execute arbitrary code and commands when untrusted input to methods including Where, Select, OrderBy is parsed.

Q: How urgent is CVE-2023-32571?

Priority 72/100. Critical severity; EPSS top 2%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2023-32571 is a critical-severity flaw (CVSS 9.8) affecting linq. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Dynamic Linq 1.0.7.10 through 1.2.25 before 1.3.0 allows attackers to execute arbitrary code and commands when untrusted input to methods including Where, Select, OrderBy is parsed.

Why this priority

Critical severity
EPSS top 2%: very likely to be exploited
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	34.9% (top 2%)
CISA exploited list	No
Weakness	CWE-697
Published	2023-06-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dynamic-linq

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

Am I affected?

Timeline

2023-06-22 20:15 UTCPublished CVE record published
2026-06-17 05:59 UTCUpdated Record last modified

dynamic-linq linq UPGRADE

Affected: >= 1.0.7.10 and <= 1.2.25

Fixed in: newer than 1.2.25

Safe to downgrade to: a release before 1.0.7.10

1. Check installed version

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

2. UPGRADE to newer than 1.2.25 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade linq

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade linq

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.0.7.10 (Debian / Ubuntu)

apt-cache madison linq sudo apt install linq=<VERSION_BEFORE_1.0.7.10> sudo apt-mark hold linq

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list linq sudo dnf downgrade linq-<VERSION_BEFORE_1.0.7.10> sudo dnf versionlock add linq

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.

Exact fixes by distribution

NuGet (.NET) · System.Linq.Dynamic.Core · FIXED · 1.3.0 · vulnerable: >= 1.0.7.10, < 1.3.0 · source

dotnet add package System.Linq.Dynamic.Core --version 1.3.0

Fedora 46 · borgmatic · FIXED · 2.2.0-1.fc46 · FEDORA-2026-041229e71b · source

sudo dnf upgrade --advisory=FEDORA-2026-041229e71b

Fedora ELN · pie · FIXED · 1.5.4-1.eln159 · FEDORA-2026-a2c0261d3a · source

sudo dnf upgrade --advisory=FEDORA-2026-a2c0261d3a

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: Tris0n/CVE-2023-32571-POC (7 stars)
GitHub PoC: vert16x/CVE-2023-32571-POC (0 stars)
GitHub PoC: SecTex/CVE-2023-32571 (0 stars)
Write-up: research.nccgroup.com/2023/06/13/dynamic-linq-injection-remote-code-execution-vulnerabilit

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-2023-32571?

linq: upgrade to newer than 1.2.25. Exact commands for each OS are on this page.

Is CVE-2023-32571 being exploited?

CVE-2023-32571 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-2023-32571 affect?

CVE-2023-32571 affects linq. Severity is critical (CVSS 9.8). Dynamic Linq 1.0.7.10 through 1.2.25 before 1.3.0 allows attackers to execute arbitrary code and commands when untrusted input to methods including Where, Select, OrderBy is parsed.

How urgent is CVE-2023-32571?

Priority 72/100. Critical severity; EPSS top 2%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

References

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