PatchTheCVECVE-2022-2586: Linux Kernel Use-After-Free Vulnerability
77
Patch now
MEDIUM 5.3EXPLOITEDWATCHLISTUPGRADEUPGRADEUPGRADE
CVE-2022-2586 is a medium-severity flaw (CVSS 5.3) affecting simatic s7-1500 tm mfp firmware, sinec os, linux kernel, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
It was discovered that a nft object or expression could reference a nft set on a different nft table, leading to a use-after-free once that table was deleted.
Why this priority
- EPSS top 4%: very likely to be exploited
- Exploited in the wild (CISA KEV)
- Public exploit reference
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Local |
| Attack complexity | High |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 10.2% (top 4%) |
| CISA exploited list | Yes, fix due 2024-07-17 |
| Weakness | CWE-416 |
| Published | 2024-01-08 |
| Last modified | 2026-10-14 |
Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Exploited Added to the CISA Known Exploited Vulnerabilities list
- Deadline CISA due date for US federal agencies to patch
- Updated Record last modified
siemens simatic s7-1500 tm mfp firmware UPGRADE
Affected: < 1.1
Fixed in: 1.1
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
siemens sinec os UPGRADE
Affected: < 2.4
Fixed in: 2.4
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
linux linux kernel UPGRADE
Affected: >= 3.16 and < 4.14.316 · >= 4.15 and < 4.19.256 · >= 4.20 and < 5.4.211 · >= 5.5 and < 5.10.137 · >= 5.11 and < 5.15.61 · >= 5.16 and < 5.18.18 · >= 5.19 and < 5.19.2
Fixed in: 4.14.316, 4.19.256, 5.4.211, 5.10.137, 5.15.61, 5.18.18, 5.19.2
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
canonical ubuntu linux MITIGATE
Affected: 14.04 · 16.04 · 18.04 · 20.04 · 22.04
Fixed in: no fixed release known
Safe to downgrade to: a release before 14.04
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Exact fixes by distribution
A distro patch exists: prefer upgrading over downgrading.
Fedora 46 · sbcl · FIXED · 2.6.10-1.fc46 · FEDORA-2026-feab1a81c6 · source
sudo dnf upgrade --advisory=FEDORA-2026-feab1a81c6
Fedora ELN · python-archspec · FIXED · 0.2.7-1.eln159 · FEDORA-2026-e2a8272db6 · source
sudo dnf upgrade --advisory=FEDORA-2026-e2a8272db6
Ubuntu 20.04 · linux · FIXED · 5.4.0-124.140
sudo apt update && sudo apt install --only-upgrade linux
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "5.4.0-124.140" && echo PATCHED || echo STILL-VULNERABLE
Ubuntu 22.04 · linux · FIXED · 5.15.0-46.49
sudo apt update && sudo apt install --only-upgrade linux
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "5.15.0-46.49" && echo PATCHED || echo STILL-VULNERABLE
Ubuntu 24.04 · linux · NOT AFFECTED
Ubuntu 24.10 · linux · NOT AFFECTED
Ubuntu 25.04 · linux · NOT AFFECTED
Debian 12 · linux · FIXED · 5.18.16-1
sudo apt update && sudo apt install --only-upgrade linux
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "5.18.16-1" && echo PATCHED || echo STILL-VULNERABLE
Debian 13 · linux · FIXED · 5.18.16-1
sudo apt update && sudo apt install --only-upgrade linux
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "5.18.16-1" && echo PATCHED || echo STILL-VULNERABLE
RHEL 8 · kernel-rt · FIXED · kernel-rt-4.18.0-425.3.1.rt7.213.el8
sudo dnf upgrade --advisory=RHSA-2022:7444
rpm -q kernel-rt
RHEL 8 · kernel · FIXED · kernel-4.18.0-425.3.1.el8
sudo dnf upgrade --advisory=RHSA-2022:7683
rpm -q kernel
RHEL 8.6 Extended Update Support · kernel · FIXED · kernel-4.18.0-372.91.1.el8_6
sudo dnf upgrade --advisory=RHSA-2024:0724
rpm -q kernel
RHEL 9 · kernel · FIXED · kernel-5.14.0-162.6.1.el9_1
sudo dnf upgrade --advisory=RHSA-2022:8267
rpm -q kernel
RHEL 9 · kernel-rt · FIXED · kernel-rt-5.14.0-162.6.1.rt21.168.el9_1
sudo dnf upgrade --advisory=RHSA-2022:7933
rpm -q kernel-rt
sudo dnf update --advisory=ALAS2023-2023-070
sudo yum update --advisory=ALAS2-2023-2100
sudo yum update --advisory=ALAS-2023-1773
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: aels/CVE-2022-2586-LPE (22 stars)
- GitHub PoC: sniper404ghostxploit/CVE-2022-2586 (2 stars)
- GitHub PoC: lanleft/CVE-2022-2586 (0 stars)
- Write-up: ubuntu.com/security/notices/USN-5560-1
- Write-up: ubuntu.com/security/notices/USN-5560-2
- Write-up: ubuntu.com/security/notices/USN-5562-1
Verify at the official source NVD · CVE Program · CISA KEV catalog · 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-2022-2586?
simatic s7-1500 tm mfp firmware: upgrade to 1.1; sinec os: upgrade to 2.4; linux kernel: upgrade to 4.14.316, 4.19.256, 5.4.211, 5.10.137, 5.15.61, 5.18.18, 5.19.2. Exact commands for each OS are on this page.
Is CVE-2022-2586 being exploited?
Yes. CVE-2022-2586 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.
What does CVE-2022-2586 affect?
CVE-2022-2586 affects simatic s7-1500 tm mfp firmware, sinec os, linux kernel. Severity is medium (CVSS 5.3). It was discovered that a nft object or expression could reference a nft set on a different nft table, leading to a use-after-free once that table was deleted.
How urgent is CVE-2022-2586?
Priority 77/100. EPSS top 4%: very likely to be exploited; Exploited in the wild (CISA KEV); Public exploit reference; On your watchlist
Software pages
Linux kernel vulnerabilities · Ubuntu vulnerabilities · Siemens vulnerabilities
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