Nixpkgs security tracker
NIXPKGS-2026-0348
GitHub issue
published on
Permalink
CVE-2026-26981
6.5 MEDIUM
- CVSS version: 3.1
- Attack vector (AV): NETWORK
- Attack complexity (AC): LOW
- Privileges required (PR): NONE
- User interaction (UI): REQUIRED
- Scope (S): UNCHANGED
- Confidentiality impact (C): NONE
- Integrity impact (I): NONE
- Availability impact (A): HIGH
by @LeSuisse Activity log
- Created automatic suggestion
-
@LeSuisse
ignored
3 packages
- openexrid-unstable
- haskellPackages.openexr-write
- openexr_2
- @LeSuisse accepted
- @LeSuisse published on GitHub
OpenEXR has heap-buffer-overflow via signed integer underflow in ImfContextInit.cpp
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.3.0 through 3.3.6 and 3.4.0 through 3.4.4, a heap-buffer-overflow (OOB read) occurs in the `istream_nonparallel_read` function in `ImfContextInit.cpp` when parsing a malformed EXR file through a memory-mapped `IStream`. A signed integer subtraction produces a negative value that is implicitly converted to `size_t`, resulting in a massive length being passed to `memcpy`. Versions 3.3.7 and 3.4.5 contain a patch.
References
Affected products
openexr
- ==>= 3.3.0, < 3.3.7
- ==>= 3.4.0, < 3.4.5
Matching in nixpkgs
Ignored packages (3)
pkgs.openexr_2
High dynamic-range (HDR) image file format
pkgs.openexrid-unstable
OpenEXR files able to isolate any object of a CG image with a perfect antialiazing
-
nixos-unstable 2017-09-17
- nixpkgs-unstable 2017-09-17
- nixos-unstable-small 2017-09-17
-
nixos-25.11 2017-09-17
- nixos-25.11-small 2017-09-17
- nixpkgs-25.11-darwin 2017-09-17
Package maintainers
-
@paperdigits Mica Semrick <mica@silentumbrella.com>