DEBIAN-CVE-2026-30922

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Source
https://security-tracker.debian.org/tracker/CVE-2026-30922
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-30922.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-30922
Upstream
Published
2026-03-18T04:17:18.397Z
Modified
2026-04-03T15:00:37.180680Z
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 0.6.3, the pyasn1 library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested SEQUENCE (0x30) or SET (0x31) tags with "Indefinite Length" (0x80) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a RecursionError or consumes all available memory (OOM), crashing the host application. This is a distinct vulnerability from CVE-2026-23490 (which addressed integer overflows in OID decoding). The fix for CVE-2026-23490 (MAX_OID_ARC_CONTINUATION_OCTETS) does not mitigate this recursion issue. Version 0.6.3 fixes this specific issue.

References

Affected packages

Debian:11 / pyasn1

Package

Name
pyasn1
Purl
pkg:deb/debian/pyasn1?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.4.8-1
0.4.8-1+deb11u1
0.4.8-2
0.4.8-2.1
0.4.8-3
0.4.8-4
0.5.1-1
0.6.0-1
0.6.1-1
0.6.2-1~bpo13+1
0.6.2-1
0.6.3-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-30922.json"

Debian:12 / pyasn1

Package

Name
pyasn1
Purl
pkg:deb/debian/pyasn1?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.4.8-3+deb12u2

Affected versions

0.*
0.4.8-3
0.4.8-3+deb12u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-30922.json"

Debian:13 / pyasn1

Package

Name
pyasn1
Purl
pkg:deb/debian/pyasn1?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.6.1-1+deb13u2

Affected versions

0.*
0.6.1-1
0.6.1-1+deb13u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-30922.json"

Debian:14 / pyasn1

Package

Name
pyasn1
Purl
pkg:deb/debian/pyasn1?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.6.3-1

Affected versions

0.*
0.6.1-1
0.6.2-1~bpo13+1
0.6.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-30922.json"