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2.1
CVE-2026-112036: Artifex MuPDF can free memory twice, causing crash
CVE-2026-112036 · published today
Summary
The MuPDF PDF viewer (versions up to 1.28.5) has a flaw in its signature‑locking code that can free the same piece of memory twice. An attacker who can send a crafted PDF could make the program stop working or potentially take control of it. Apply the supplied patch or upgrade to a newer version as soon as possible.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| artifex | mupdf | 1.28.0 |
Original advisory text
Artifex MuPDF Signature Locking pdf-xref.c free_char_list double free
A vulnerability was detected in Artifex MuPDF up to 1.28.5. This impacts the function free_char_list of the file source/pdf/pdf-xref.c of the component Signature Locking. Performing a manipulation results in double free. The attack may be initiated remotely. The exploit is now public and may be used. The patch is named 3984925b660afb8a781ddf504021e91be1bc671e. To fix this issue, it is recommended to deploy a patch.
References
- https://vuldb.com/vuln/421684
- https://vuldb.com/vuln/421684/cti
- https://vuldb.com/cve/CVE-2026-112036
- https://vuldb.com/submit/1008495
- https://bugs.ghostscript.com/show_bug.cgi?id=709768
- https://bugs.ghostscript.com/attachment.cgi?id=28609
- http://www.ghostscript.com/cgi-bin/findgit.cgi?3984925b660afb8a781ddf504021e91be...
- https://artifex.com/
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker partial control (estimated)
Severity
2.1
Low
Type
CWE-415Double Free
CWE-119Buffer Overflow
Timeline
Published19 Oct 2026
Updated19 Oct 2026
First seen19 Oct 2026
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