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CVE

CVE-2026-51807

Heap-based out-of-bounds write in j2k_precinct_subband::parse_packet_header() in OpenHTJ2K versions 0.18.3 and earlier (fixed in v0.18.4) caused by missing bounds validation before coding-pass lengths...
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CVE

CVE-2026-51807

Heap-based out-of-bounds write in j2k_precinct_subband::parse_packet_header() in OpenHTJ2K versions 0.18.3 and earlier (fixed in v0.18.4) caused by missing bounds validation before coding-pass lengths...

Heap-based out-of-bounds write in j2kprecinctsubband::parsepacketheader() in OpenHTJ2K versions 0.18.3 and earlier (fixed in v0.18.4) caused by missing bounds validation before coding-pass lengths are written to j2kcodeblock::passlength[128]. A crafted JPEG 2000 codestream containing malformed PPM packet headers can trigger a heap-based out-of-bounds write in j2kprecinctsubband::parsepacketheader() in source/core/coding/codingunits.cpp due to missing bounds validation for the j2kcodeblock::pass_length[128] array which can lead to heap corruption and process termination.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/osamu620/OpenHTJ2K/blob/main/CHANGELOG, https://github.com/osamu620/OpenHTJ2K/compare/0778b93...v0.18.4, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/51xxx/CVE-2026-51807.json, https://nvd.nist.gov/vuln/detail/CVE-2026-51807, https://github.com/osamu620/OpenHTJ2K/commit/0778b93, https://github.com/osamu620/OpenHTJ2K/releases

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00671%
EPSS Percentile
0.49149%
Introduced Version
0
Fix Available
0778b93

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