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CVE-2022-4087: A vulnerability was found in iPXE

20
Routine
LOW 2.6UPGRADE

CVE-2022-4087 is a low-severity flaw (CVSS 2.6) affecting ipxe. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in iPXE. It has been declared as problematic. This vulnerability affects the function tls_new_ciphertext of the file src/net/tls.c of the component TLS. The manipulation of the argument pad_len leads to information exposure through discrepancy. The name of the patch is 186306d6199096b7a7c4b4574d4be8cdb8426729. It is recommended to apply a patch to fix this issue. VDB-214054 is the identifier assigned to this vulnerabilit

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score2.6 (Low)
Attack vectorAdjacent network
Attack complexityHigh
Privileges neededLow
User interactionNone
EPSS exploit chance0.5% (top 55%)
CISA exploited listNo
WeaknessCWE-284, CWE-203
Published2022-11-21
Last modified2026-06-17
Publisher (CNA): VulDB · Vendor: ipxe

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

Am I affected?

Timeline

ipxe ipxe UPGRADE
Affected: < 2022-11-08
Fixed in: 2022-11-08
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-2022-4087?

ipxe: upgrade to 2022-11-08. Exact commands for each OS are on this page.

Is CVE-2022-4087 being exploited?

CVE-2022-4087 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-2022-4087 affect?

CVE-2022-4087 affects ipxe. Severity is low (CVSS 2.6). A vulnerability was found in iPXE. It has been declared as problematic. This vulnerability affects the function tls_new_ciphertext of the file src/net/tls.c of the component TLS. The manipulation of the argument pad_len leads to information

How urgent is CVE-2022-4087?

Priority 20/100. No elevated risk signals yet.

References

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