CVE-2024-24246: Heap Buffer Overflow vulnerability in qpdf 11.9.0 allows attackers to crash the application via the std::__sha

Routine

MEDIUM 5.5DOWNGRADEMITIGATE

CVE-2024-24246 is a medium-severity flaw (CVSS 5.5) affecting qpdf, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap Buffer Overflow vulnerability in qpdf 11.9.0 allows attackers to crash the application via the std::__shared_count() function at /bits/shared_ptr_base.h.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-787, CWE-122
Published	2024-02-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fedoraproject · qpdf project

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

Am I affected?

Timeline

2024-02-29 20:15 UTCPublished CVE record published
2026-06-17 07:14 UTCUpdated Record last modified

qpdf project qpdf DOWNGRADE

Affected: 11.9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.9.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 11.9.0 (Debian / Ubuntu)

apt-cache madison qpdf sudo apt install qpdf=<VERSION_BEFORE_11.9.0> sudo apt-mark hold qpdf

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

dnf --showduplicates list qpdf sudo dnf downgrade qpdf-<VERSION_BEFORE_11.9.0> sudo dnf versionlock add qpdf

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.

fedoraproject fedora MITIGATE

Affected: 38 · 39 · 40

Fixed in: no fixed release known

Safe to downgrade to: a release before 38

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-2024-24246?

qpdf: downgrade or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-24246 being exploited?

CVE-2024-24246 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-2024-24246 affect?

CVE-2024-24246 affects qpdf, fedora. Severity is medium (CVSS 5.5). Heap Buffer Overflow vulnerability in qpdf 11.9.0 allows attackers to crash the application via the std::__shared_count() function at /bits/shared_ptr_base.h.

How urgent is CVE-2024-24246?

Priority 34/100. Public exploit reference

References

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