The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - OpenEXR provides the specification and reference implementation of the EXR file format, an image storage     format for the motion picture industry. Versions 3.4.0 through 3.4.9 have a signed integer overflow     vulnerability in OpenEXR's HTJ2K (High-Throughput JPEG 2000) decompression path. The `ht_undo_impl()`     function in `src/lib/OpenEXRCore/internal_ht.cpp` accumulates a bytes-per-line value (`bpl`) using a     32-bit signed integer with no overflow guard. A crafted EXR file with 16,385 FLOAT channels at the HTJ2K     maximum width of 32,767 causes `bpl` to overflow `INT_MAX`, producing undefined behavior confirmed by     UBSan. On an allocator-permissive host where the required ~64 GB allocation succeeds, the wrapped negative     `bpl` value would subsequently be used as a per-scanline pointer advance, which would produce a heap out-     of-bounds write. On a memory-constrained host, the allocation fails before `ht_undo_impl()` is entered.
    This is the second distinct integer overflow in `ht_undo_impl()`. CVE-2026-34545 addressed a different     overflow in the same function  the `int16_t p` pixel-loop counter at line ~302 that overflows when     iterating over channels whose `width` exceeds 32,767. The CVE-2026-34545 fix did not touch the `int bpl`     accumulator at line 211, which is the subject of this advisory. The `bpl` accumulator was also not     addressed by any of the 8 advisories in the 2026-04-05 v3.4.9 release batch. This finding is structurally     identical to CVE-2026-34588 (PIZ `wcount*nx` overflow in `internal_piz.c`) and should be remediated with     the same pattern. The CVE-2026-34588 fix did not touch `internal_ht.cpp`. Version 3.4.10 contains a     remediation that addresses the vulnerability in `internal_ht.cpp`. (CVE-2026-39886)

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Linux Distros Unpatched Vulnerability : CVE-2026-39886

medium Nessus Plugin ID 309639

Version 1.3