PatchTheCVECVE-2024-43498: .NET and Visual Studio Remote Code Execution Vulnerability
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CRITICAL 9.8REMOTEWATCHLISTDOWNGRADEUPGRADE
CVE-2024-43498 is a critical-severity flaw (CVSS 9.8) affecting .net, visual studio 2022. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
.NET and Visual Studio Remote Code Execution Vulnerability
Why this priority
- Critical severity
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
- On your watchlist
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 | 3.6% (top 11%) |
| CISA exploited list | No |
| Weakness | CWE-843 |
| Published | 2024-11-12 |
| Last modified | 2026-06-17 |
Publisher (CNA): Microsoft Corporation · Vendor: microsoft
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
microsoft .net DOWNGRADE
Affected: 9.0.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 9.0.0
1. Check installed version
apt-cache policy .net || rpm -q .net || .net --version
2. No fixed release: DOWNGRADE to a release before 9.0.0 (Debian / Ubuntu)
apt-cache madison .net
sudo apt install .net=<VERSION_BEFORE_9.0.0>
sudo apt-mark hold .net
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list .net
sudo dnf downgrade .net-<VERSION_BEFORE_9.0.0>
sudo dnf versionlock add .net
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.
microsoft visual studio 2022 UPGRADE
Affected: >= 17.6 and < 17.6.21 · >= 17.8 and < 17.8.16 · >= 17.10.0 and < 17.10.9 · >= 17.11.0 and < 17.11.6
Fixed in: 17.6.21, 17.8.16, 17.10.9, 17.11.6
Safe to downgrade to: a release before 17.6
1. Check installed version
apt-cache policy visual-studio-2022 || rpm -q visual-studio-2022 || visual-studio-2022 --version
2. UPGRADE to 17.6.21 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade visual-studio-2022
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade visual-studio-2022
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 17.6 (Debian / Ubuntu)
apt-cache madison visual-studio-2022
sudo apt install visual-studio-2022=<VERSION_BEFORE_17.6>
sudo apt-mark hold visual-studio-2022
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list visual-studio-2022
sudo dnf downgrade visual-studio-2022-<VERSION_BEFORE_17.6>
sudo dnf versionlock add visual-studio-2022
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
A distro patch exists: prefer upgrading over downgrading.
NuGet (.NET) · System.Formats.Nrbf · FIXED · 9.0.0 · vulnerable: < 9.0.0 · source
dotnet add package System.Formats.Nrbf --version 9.0.0
Fedora 46 · byobu · FIXED · 7.23-1.fc46 · FEDORA-2026-08f2b53446 · source
sudo dnf upgrade --advisory=FEDORA-2026-08f2b53446
Ubuntu 22.04 · dotnet6 · NOT AFFECTED
Ubuntu 22.04 · dotnet8 · NOT AFFECTED
Ubuntu 24.04 · dotnet8 · NOT AFFECTED
Ubuntu 24.10 · dotnet8 · NOT AFFECTED
Ubuntu 24.10 · dotnet9 · FIXED · 9.0.100-9.0.0-0ubuntu1~24.10.1
sudo apt update && sudo apt install --only-upgrade dotnet9
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' dotnet9)" ge "9.0.100-9.0.0-0ubuntu1~24.10.1" && echo PATCHED || echo STILL-VULNERABLE
RHEL 9 · dotnet9.0 · FIXED · dotnet9.0-9.0.100-1.el9_5
sudo dnf upgrade --advisory=RHSA-2024:9543
rpm -q dotnet9.0
RHEL 10 · dotnet8.0 · NOT AFFECTED
RHEL 10 · dotnet9.0 · NOT AFFECTED
RHEL 8 · dotnet6.0 · NOT AFFECTED
RHEL 8 · dotnet8.0 · NOT AFFECTED
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.
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-2024-43498?
.net: downgrade or apply the listed mitigation; visual studio 2022: upgrade to 17.6.21, 17.8.16, 17.10.9, 17.11.6. Exact commands for each OS are on this page.
Is CVE-2024-43498 being exploited?
CVE-2024-43498 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-2024-43498 affect?
CVE-2024-43498 affects .net, visual studio 2022. Severity is critical (CVSS 9.8). .NET and Visual Studio Remote Code Execution Vulnerability
How urgent is CVE-2024-43498?
Priority 70/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action; On your watchlist
Software pages
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