CVE-2026-12912

Summary

A flaw was found in libtiff. A remote attacker could exploit this vulnerability by providing a specially crafted PixarLog-compressed TIFF image. This issue occurs when decoding Pixarlog codec images with the PIXARLOGDATAFMT_8BITABGR output format and a specific stride value, leading to a heap-based buffer overflow. This could potentially result in arbitrary code execution or a denial of service (DoS).

Affected Software

VendorProductVersion RangeStatus
Red HatRed Hat Hardened Images4.7.1-2.4.hum1 < *unaffected

Weaknesses

  • CWE-122: Heap-based Buffer Overflow

Workarounds

To mitigate this issue, applications processing untrusted TIFF images should avoid explicitly configuring PIXARLOGDATAFMT_8BITABGR when decoding PixarLog-compressed TIFF images with three samples per pixel. This specific combination of output format and samples per pixel is required to trigger the heap-based buffer overflow.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

libtiff: libtiff: Heap-based buffer overflow via crafted PixarLog-compressed TIFF image

Additional References

References