Bug 2538689 (CVE-2026-93019)

Summary: CVE-2026-93019 perl-Imager: Imager versions before 1.036 for Perl exit the process reading a TGA with a colour map length of 32768 or more in tga_palette_read
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A signed integer conversion flaw was found in the Perl Imager library's TGA file reader. The colourmaplength field in the TGA header is declared as a signed short int. A TGA file with a colour map length of 32768 or greater causes the value to become negative, which sign-extends to a value near SIZE_MAX when cast to size_t for memory allocation. The allocator calls exit(3) on the resulting allocation failure, killing the entire host process in a way that cannot be caught by Perl's eval/die exception handling.
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Description OSIDB Bzimport 2026-09-22 20:02:59 UTC 
Imager versions before 1.036 for Perl exit the process reading a TGA with a colour map length of 32768 or more in tga_palette_read.

The reader unpacks the two-byte colour map length into a signed short, so a length of 32768 or more becomes negative. tga_palette_read() casts that value to size_t and asks mymalloc() for a size near SIZE_MAX. The allocation fails and Imager's allocator calls exit(3).

Reading an attacker-supplied file through Imager->read() triggers an uncatchable exit.