CVE-2023-30086: Buffer Overflow vulnerability found in Libtiff V.4.0.7 allows a local attacker to cause a denial of service vi

Routine

MEDIUM 5.5DOWNGRADE

CVE-2023-30086 is a medium-severity flaw (CVSS 5.5) affecting libtiff. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer Overflow vulnerability found in Libtiff V.4.0.7 allows a local attacker to cause a denial of service via the tiffcp function in tiffcp.c.

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	Low
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-787
Published	2023-05-09
Last modified	2026-07-09

Publisher (CNA): MITRE · Vendor: libtiff

Last updated 2026-07-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-05-09 16:15 UTCPublished CVE record published
2026-07-09 01:18 UTCUpdated Record last modified

libtiff libtiff DOWNGRADE

Affected: 4.0.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0.7

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.0.7 (Debian / Ubuntu)

apt-cache madison libtiff sudo apt install libtiff=<VERSION_BEFORE_4.0.7> sudo apt-mark hold libtiff

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

dnf --showduplicates list libtiff sudo dnf downgrade libtiff-<VERSION_BEFORE_4.0.7> sudo dnf versionlock add libtiff

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.

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-2023-30086?

libtiff: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-30086 being exploited?

CVE-2023-30086 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-2023-30086 affect?

CVE-2023-30086 affects libtiff. Severity is medium (CVSS 5.5). Buffer Overflow vulnerability found in Libtiff V.4.0.7 allows a local attacker to cause a denial of service via the tiffcp function in tiffcp.c.

How urgent is CVE-2023-30086?

Priority 30/100. Public exploit reference

Related CVEs

CVE-2026-4775 HIGH 7.8 UPGRADE MITIGATE A flaw was found in the libtiff library
CVE-2023-52355 HIGH 7.5 UPGRADE MITIGATE An out-of-memory flaw was found in libtiff that could be triggered by passing a crafted tiff file to the TIFFR
CVE-2023-3576 MEDIUM 5.5 UPGRADE MITIGATE A memory leak flaw was found in Libtiff's tiffcrop utility
CVE-2025-9165 LOW 2.5 DOWNGRADE A flaw has been found in LibTIFF 4.7.0
CVE-2025-8961 LOW 3.3 DOWNGRADE A weakness has been identified in LibTIFF 4.7.0

References

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