NULL pointer dereference in libtiff
Priority MEDIUM 58CWE-476Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-476.
Summary
A NULL pointer dereference flaw was found in Libtiff's LZWDecode() function in the libtiff/tif_lzw.c file. This flaw allows a local attacker to craft specific input data that can cause the program to dereference a NULL pointer when decompressing a TIFF format file, resulting in a program crash or denial of service.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00427 37th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 1 advisory
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | libtiff | Fixed in libtiff v4.5.0 | — | No fix listed | CNA |
- libtiff Vendor— Affected Fixed in libtiff v4.5.0 Fixed in — No fix listed CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libtiff:libtiff:*:*:*:*:*:*:*:* | before 4.5.0 | Vulnerable | libtiff |
| cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* | 38 | Vulnerable | Fedoraproject |
| cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Red Hat |
- cpe:2.3:a:libtiff:libtiff:*:*:*:*:*:*:*:* Versions before 4.5.0 Vulnerable ·libtiff
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
Remediation
Red Hat 1 advisory
- RHSA-2023:6575 Released 2023-11-07 · Red Hat rating Moderatelibtiff security update
- Red Hat CodeReady Linux Builder (v. 9) libtiff-tools-4.4.0-10.el9
- Red Hat Enterprise Linux AppStream (v. 9) libtiff-4.4.0-10.el9, libtiff-devel-4.4.0-10.el9
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat CodeReady Linux Builder (v. 9) | Fixed | RHSA-2023:6575 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:6575 |
Not affected: 3 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2023-2731
- 2026-10-03 Alias added: GHSA-g995-h8wx-7qw6
References
Patch 2
Sources
- CVE-2023-2731 · CVE Program
- CVE-2023-2731 · NVD
- FIRST EPSS
- GHSA-g995-h8wx-7qw6 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-2731 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences