Netpbm up to 10.86.50/11.02.29/11.15.7 PICT File paintPoly stack-based overflow

Summaryinfo

A vulnerability labeled as problematic has been found in Netpbm up to 10.86.50/11.02.29/11.15.7. This affects the function paintPoly of the component PICT File Handler. Executing a manipulation can lead to stack-based overflow. This vulnerability appears as CVE-2026-120433. The attack requires local access. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Netpbm up to 10.86.50/11.02.29/11.15.7. It has been declared as problematic. This vulnerability affects the function paintPoly of the component PICT File Handler. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Netpbm before 10.86.51, 11.x before 11.02.30, and 11.03 before 11.15.08 contains a stack-based buffer overflow in the picttoppm paintPoly() function due to an unbounded polygon point count. Attackers can supply a crafted PICT file with a polygon exceeding 100 points to overwrite the fixed pts array, causing crashes or potentially code execution.

The advisory is available at sourceforge.net. This vulnerability was named CVE-2026-120433 since 11/02/2026. The exploitation appears to be easy. Local access is required to approach this attack. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 10.86.51, 11.02.30 or 11.15.08 eliminates this vulnerability.

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Productinfo

Name

• Netpbm

Version

• 10.86.0
• 10.86.1
• 10.86.2
• 10.86.3
• 10.86.4
• 10.86.5
• 10.86.6
• 10.86.7
• 10.86.8
• 10.86.9
• 10.86.10
• 10.86.11
• 10.86.12
• 10.86.13
• 10.86.14
• 10.86.15
• 10.86.16
• 10.86.17
• 10.86.18
• 10.86.19
• 10.86.20
• 10.86.21
• 10.86.22
• 10.86.23
• 10.86.24
• 10.86.25
• 10.86.26
• 10.86.27
• 10.86.28
• 10.86.29
• 10.86.30
• 10.86.31
• 10.86.32
• 10.86.33
• 10.86.34
• 10.86.35
• 10.86.36
• 10.86.37
• 10.86.38
• 10.86.39
• 10.86.40
• 10.86.41
• 10.86.42
• 10.86.43
• 10.86.44
• 10.86.45
• 10.86.46
• 10.86.47
• 10.86.48
• 10.86.49
• 10.86.50
• 11.02.0
• 11.02.1
• 11.02.2
• 11.02.3
• 11.02.4
• 11.02.5
• 11.02.6
• 11.02.7
• 11.02.8
• 11.02.9
• 11.02.10
• 11.02.11
• 11.02.12
• 11.02.13
• 11.02.14
• 11.02.15
• 11.02.16
• 11.02.17
• 11.02.18
• 11.02.19
• 11.02.20
• 11.02.21
• 11.02.22
• 11.02.23
• 11.02.24
• 11.02.25
• 11.02.26
• 11.02.27
• 11.02.28
• 11.02.29
• 11.15.0
• 11.15.1
• 11.15.2
• 11.15.3
• 11.15.4
• 11.15.5
• 11.15.6
• 11.15.7

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