CVE-2023-0881: Running DDoS on tcp port 22 will trigger a kernel crash

Q: How do I fix CVE-2023-0881?

linux-bluefield: upgrade to 5.4.0-1058.64. Exact commands for each OS are on this page.

Q: Is CVE-2023-0881 being exploited?

CVE-2023-0881 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-2023-0881 affect?

CVE-2023-0881 affects linux-bluefield. Severity is high (CVSS 7.5). Running DDoS on tcp port 22 will trigger a kernel crash. This issue is introduced by the backport of a commit regarding nft_lookup without the subsequent fixes that were introduced after this commit. The resolution of this CVE introduces th

Q: How urgent is CVE-2023-0881?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

This week

HIGH 7.5REMOTEWATCHLISTUPGRADE

CVE-2023-0881 is a high-severity flaw (CVSS 7.5) affecting linux-bluefield. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Running DDoS on tcp port 22 will trigger a kernel crash. This issue is introduced by the backport of a commit regarding nft_lookup without the subsequent fixes that were introduced after this commit. The resolution of this CVE introduces those commits to the linux-bluefield package.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-20, CWE-1333
Published	2025-03-31
Last modified	2026-06-17

Publisher (CNA): Canonical Ltd. · Vendor: canonical

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

Am I affected?

Timeline

2025-03-31 14:15 UTCPublished CVE record published
2026-06-17 05:26 UTCUpdated Record last modified

canonical linux-bluefield UPGRADE

Affected: < 5.4.0-1058.64

Fixed in: 5.4.0-1058.64

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy linux-bluefield || rpm -q linux-bluefield || linux-bluefield --version

2. UPGRADE to 5.4.0-1058.64 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade linux-bluefield

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade linux-bluefield

Note

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

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-2023-0881?

linux-bluefield: upgrade to 5.4.0-1058.64. Exact commands for each OS are on this page.

Is CVE-2023-0881 being exploited?

CVE-2023-0881 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-2023-0881 affect?

CVE-2023-0881 affects linux-bluefield. Severity is high (CVSS 7.5). Running DDoS on tcp port 22 will trigger a kernel crash. This issue is introduced by the backport of a commit regarding nft_lookup without the subsequent fixes that were introduced after this commit. The resolution of this CVE introduces th

How urgent is CVE-2023-0881?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

References

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