CVE-2007-0907: Buffer underflow in PHP before 5.2.1 allows attackers to cause a denial of service via unspecified vectors inv

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MEDIUM 5.0WATCHLISTDOWNGRADEMITIGATE

CVE-2007-0907 is a medium-severity flaw (CVSS 5.0) affecting php, secure linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer underflow in PHP before 5.2.1 allows attackers to cause a denial of service via unspecified vectors involving the sapi_header_op function.

Why this priority

On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Published	2007-02-13
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: php · trustix

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2007-02-13 23:28 UTCPublished CVE record published
2026-06-16 22:36 UTCUpdated Record last modified

php php DOWNGRADE

Affected: 3.0 · 3.0.1 · 3.0.2 · 3.0.3 · 3.0.4 · 3.0.5 · 3.0.6 · 3.0.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0

1. Check installed version

apt-cache policy php || rpm -q php || php --version

2. No fixed release: DOWNGRADE to a release before 3.0 (Debian / Ubuntu)

apt-cache madison php sudo apt install php=<VERSION_BEFORE_3.0> sudo apt-mark hold php

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list php sudo dnf downgrade php-<VERSION_BEFORE_3.0> sudo dnf versionlock add php

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.

trustix secure linux MITIGATE

Affected: 2.2 · 3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2

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-2007-0907?

php: downgrade or apply the listed mitigation; secure linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2007-0907 being exploited?

CVE-2007-0907 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-2007-0907 affect?

CVE-2007-0907 affects php, secure linux. Severity is medium (CVSS 5.0). Buffer underflow in PHP before 5.2.1 allows attackers to cause a denial of service via unspecified vectors involving the sapi_header_op function.

How urgent is CVE-2007-0907?

Priority 43/100. On your watchlist

Software pages

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References

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