CVE catalog
CVE-2026-77220
PDFio before 1.6.5 contains a dangling pointer vulnerability in the dictionary string-formatting function that stores a pointer to a stack-local buffer in the document dictionary without copying the s
- Severity
- High · CVSS 7.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.42% · Oct 25, 2026
PDFio before 1.6.5 contains a dangling pointer vulnerability in the dictionary string-formatting function that stores a pointer to a stack-local buffer in the document dictionary without copying the string value. In multi-threaded or pooled-request environments, attackers or concurrent users can trigger stack memory reuse across requests, causing cross-tenant document content corruption by silently overwriting one caller's dictionary string values with another caller's data.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | ippsample | sid | 0.0.0~git20220215.f365352-2 | vulnerable |
| Debian | ippsample | forky | 0.0.0~git20220215.f365352-2 | vulnerable |
| Debian | ippsample | bookworm | 0.0~git20220607.72f89b3-1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | ippsample | source | sid | (unfixed) | not yet assigned | Not reported | [1145176] |
| Debian | ippsample | source | forky | (unfixed) | not yet assigned | Not reported | [1145176] |
| Debian | ippsample | source | bookworm | (unfixed) | not yet assigned | Not reported | [1145176] |
Notes
[bookworm] ippsample: Minor issue, low popcon
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [ippsample]Affected
Details (2)
0.0~git20220607.72f89b3-1· amd64 · bookwormAffected
nvd · ippsample · debian · bookworm; nvd · ippsample · debian · 12
0.0~git20220607.72f89b3-1· arm64 · bookwormAffected
nvd · ippsample · debian · bookworm; nvd · ippsample · debian · 12
- [ippsample-data]Affected
Source package: [ippsample]
Details (2)
0.0~git20220607.72f89b3-1· all · bookwormAffected
nvd · ippsample · debian · bookworm; nvd · ippsample · debian · 12
0.0~git20220607.72f89b3-1· all · bookwormAffected
nvd · ippsample · debian · bookworm; nvd · ippsample · debian · 12
Observed: