CVE-2023-25526: NVIDIA Cumulus Linux contains a vulnerability in neighmgrd and nlmanager where an attacker on an adjacent netw

Q: How do I fix CVE-2023-25526?

cumulus linux: upgrade to 5.5.0. Exact commands for each OS are on this page.

Q: Is CVE-2023-25526 being exploited?

CVE-2023-25526 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-2023-25526 affect?

CVE-2023-25526 affects cumulus linux. Severity is medium (CVSS 6.5). NVIDIA Cumulus Linux contains a vulnerability in neighmgrd and nlmanager where an attacker on an adjacent network may cause an uncaught exception by injecting a crafted packet. A successful exploit may lead to denial of service.

Q: How urgent is CVE-2023-25526?

Priority 34/100. On your watchlist

Routine

MEDIUM 6.5WATCHLISTUPGRADE

CVE-2023-25526 is a medium-severity flaw (CVSS 6.5) affecting cumulus linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NVIDIA Cumulus Linux contains a vulnerability in neighmgrd and nlmanager where an attacker on an adjacent network may cause an uncaught exception by injecting a crafted packet. A successful exploit may lead to denial of service.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-248
Published	2023-09-20
Last modified	2026-06-17

Publisher (CNA): NVIDIA Corporation · Vendor: nvidia

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

Am I affected?

Timeline

2023-09-20 01:15 UTCPublished CVE record published
2026-06-17 05:41 UTCUpdated Record last modified

nvidia cumulus linux UPGRADE

Affected: < 5.5.0

Fixed in: 5.5.0

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.

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-2023-25526?

cumulus linux: upgrade to 5.5.0. Exact commands for each OS are on this page.

Is CVE-2023-25526 being exploited?

CVE-2023-25526 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-2023-25526 affect?

CVE-2023-25526 affects cumulus linux. Severity is medium (CVSS 6.5). NVIDIA Cumulus Linux contains a vulnerability in neighmgrd and nlmanager where an attacker on an adjacent network may cause an uncaught exception by injecting a crafted packet. A successful exploit may lead to denial of service.

How urgent is CVE-2023-25526?

Priority 34/100. On your watchlist

Software pages

NVIDIA vulnerabilities

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References

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