Vulnerability · Published Oct 19, 2026 · Assigned by GitHub_M
CVE-2026-112392Pillow: NULL dereference in ImagingExpand via rank filters on zero-size images
High 8.2
In plain English
A high-severity null pointer dereference in Pillow from python-pillow. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Pillow is a Python imaging library. Prior to 13.0.0, Pillow's rank-based filters can dereference invalid image storage for a zero-size image. ImagingExpand() allocates a non-empty output and then faults while replicating edges by reading the first pixel from empty input storage; ImagingRankFilter is never reached. An attacker can supply or cause creation of a zero-size image to an application that applies a rank, median, minimum, or maximum filter. This causes a native process crash. This issue is fixed in version 13.0.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | python3-pillow | 5.1.1-33.el8_10 | ALSA-2026:92639 |
| AlmaLinux:8 | python3-pillow-devel | 5.1.1-33.el8_10 | ALSA-2026:92639 |
| AlmaLinux:8 | python3-pillow-doc | 5.1.1-33.el8_10 | ALSA-2026:92639 |
| AlmaLinux:8 | python3-pillow-tk | 5.1.1-33.el8_10 | ALSA-2026:92639 |
| Debian:12 | pillow | no fix listed | DEBIAN-CVE-2026-112392 |
| Debian:13 | pillow | no fix listed | DEBIAN-CVE-2026-112392 |
| Debian:14 | pillow | no fix listed | DEBIAN-CVE-2026-112392 |
| PyPI | pillow | 13.0.0 | GHSA-27h8-gf7j-v5hc |
| PyPI | pillow | 13.0.0 | PYSEC-2026-4326 |
| Rocky Linux:8 | python-pillow | 0:5.1.1-33.el8_10 | RLSA-2026:92639 |
| Ubuntu:22.04:LTS | pillow | no fix listed | UBUNTU-CVE-2026-112392 |
| Ubuntu:24.04:LTS | pillow | no fix listed | UBUNTU-CVE-2026-112392 |
| Ubuntu:26.04:LTS | pillow | no fix listed | UBUNTU-CVE-2026-112392 |
| Ubuntu:26.10 | pillow | no fix listed | UBUNTU-CVE-2026-112392 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| python-pillow | Pillow | < 13.0.0 |
Weakness: CWE-476 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N