DEBIAN-CVE-2026-119197
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-119197
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-119197.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-119197
- Upstream
- Published
- 2026-10-29T20:17:30Z
- Modified
- 2026-10-30T09:00:05Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.5, binary REAL decoding builds a large mantissa one octet at a time by shifting a growing integer and slicing the remaining byte string. Attacker-controlled ASN.1 includes a binary-encoded REAL with a large mantissa and reaches BER, CER, or DER decode(), with or without a schema containing REAL. RealPayloadDecoder.valueDecoder repeatedly performs a left shift, OR, and suffix copy for every mantissa octet, making decode time quadratic in mantissa length. A comparatively small REAL value can hold a decoding worker on one CPU core for seconds or longer and cause availability loss. This issue is fixed in version 0.6.5.
- References
Affected packages
Debian:12 / pyasn1
Package
- Name
- pyasn1
- Purl
- pkg:deb/debian/pyasn1?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / pyasn1
Package
- Name
- pyasn1
- Purl
- pkg:deb/debian/pyasn1?arch=source&distro=trixie
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:14 / pyasn1
Package
- Name
- pyasn1
- Purl
- pkg:deb/debian/pyasn1?arch=source&distro=forky