CVE-2013-1591: Stack-based buffer overflow in libpixman, as used in Pale Moon before 15.4 and possibly other products, has un

Q: How do I fix CVE-2013-1591?

enterprise virtualization: downgrade or apply the listed mitigation; enterprise linux: mitigate or apply the listed mitigation; pale moon: upgrade to 15.4. Exact commands for each OS are on this page.

Q: Is CVE-2013-1591 being exploited?

CVE-2013-1591 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-2013-1591 affect?

CVE-2013-1591 affects enterprise virtualization, enterprise linux, pale moon. Severity is critical (CVSS 9.8). Stack-based buffer overflow in libpixman, as used in Pale Moon before 15.4 and possibly other products, has unspecified impact and context-dependent attack vectors. NOTE: this issue might be resultant from an integer overflow in the fast_c

Q: How urgent is CVE-2013-1591?

Priority 72/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

This week

CRITICAL 9.8REMOTEWATCHLISTDOWNGRADEMITIGATEUPGRADE

CVE-2013-1591 is a critical-severity flaw (CVSS 9.8) affecting enterprise virtualization, enterprise linux, pale moon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in libpixman, as used in Pale Moon before 15.4 and possibly other products, has unspecified impact and context-dependent attack vectors. NOTE: this issue might be resultant from an integer overflow in the fast_composite_scaled_bilinear function in pixman-inlines.h, which triggers an infinite loop.

Why this priority

Critical 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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.6% (top 10%)
CISA exploited list	No
Weakness	CWE-190
Published	2013-01-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: palemoon · redhat

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

Am I affected?

Timeline

2013-01-31 23:55 UTCPublished CVE record published
2026-06-16 23:51 UTCUpdated Record last modified

redhat enterprise virtualization DOWNGRADE

Affected: 3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0

1. Check installed version

apt-cache policy enterprise-virtualization || rpm -q enterprise-virtualization || enterprise-virtualization --version

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

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

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

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

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.

redhat enterprise linux MITIGATE

Affected: 6.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

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.

palemoon pale moon UPGRADE

Affected: < 15.4

Fixed in: 15.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pale-moon || rpm -q pale-moon || pale-moon --version

2. UPGRADE to 15.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pale-moon

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pale-moon

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-2013-1591?

enterprise virtualization: downgrade or apply the listed mitigation; enterprise linux: mitigate or apply the listed mitigation; pale moon: upgrade to 15.4. Exact commands for each OS are on this page.

Is CVE-2013-1591 being exploited?

CVE-2013-1591 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-2013-1591 affect?

CVE-2013-1591 affects enterprise virtualization, enterprise linux, pale moon. Severity is critical (CVSS 9.8). Stack-based buffer overflow in libpixman, as used in Pale Moon before 15.4 and possibly other products, has unspecified impact and context-dependent attack vectors. NOTE: this issue might be resultant from an integer overflow in the fast_c

How urgent is CVE-2013-1591?

Priority 72/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

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References

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