DEBIAN-CVE-2026-76875

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Source
https://security-tracker.debian.org/tracker/CVE-2026-76875
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-76875.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-76875
Upstream
  • CVE-2026-76875
Published
2026-09-29T13:17:52Z
Modified
2026-09-30T05:00:59Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
[none]
Details

PyPy before versions 3.11.16 and 3.12.14 contains a use-after-free vulnerability in the pyexpat module's ExternalEntityParserCreate function that allows attackers to corrupt memory by supplying a crafted XML document to applications that create external-entity sub-parsers without retaining a reference to the parent parser. The child parser retains a raw C back-pointer to the parent parser struct while PyPy's tracing garbage collector can free the parent's C struct, causing bundled libexpat to dereference the freed pointer on every parsed token, producing memory corruption.

References

Affected packages

Debian:12 / pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source&distro=bookworm

Affected ranges

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

Affected versions

7.*
7.3.11+dfsg-2
7.3.11+dfsg-2+deb12u1
7.3.11+dfsg-2+deb12u2
7.3.11+dfsg-2+deb12u3
7.3.12~rc1+dfsg-1
7.3.12~rc2+dfsg-1
7.3.12+dfsg-1
7.3.13+dfsg-1
7.3.14+dfsg-1
7.3.15+dfsg-1
7.3.16+dfsg-1
7.3.16+dfsg-2
7.3.17+dfsg-1
7.3.17+dfsg-2
7.3.17+dfsg-3
7.3.18+dfsg-1
7.3.18+dfsg-2
7.3.19+dfsg-1
7.3.19+dfsg-2
7.3.20+dfsg-1
7.3.20+dfsg-2
7.3.20+dfsg-3
7.3.20+dfsg-4
7.3.21+dfsg-1
7.3.21+dfsg-2
7.3.21+dfsg-3
7.3.21+dfsg-4
7.3.22+dfsg-1
7.3.23+dfsg-1
7.3.23+dfsg-2
8.*
8.0.0+dfsg-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-76875.json"

Debian:13 / pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source&distro=trixie

Affected ranges

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

Affected versions

7.*
7.3.19+dfsg-2
7.3.20+dfsg-1
7.3.20+dfsg-2
7.3.20+dfsg-3
7.3.20+dfsg-4
7.3.21+dfsg-1
7.3.21+dfsg-2
7.3.21+dfsg-3
7.3.21+dfsg-4
7.3.22+dfsg-1
7.3.23+dfsg-1
7.3.23+dfsg-2
8.*
8.0.0+dfsg-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-76875.json"

Debian:14 / pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source&distro=forky

Affected ranges

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

Affected versions

7.*
7.3.19+dfsg-2
7.3.20+dfsg-1
7.3.20+dfsg-2
7.3.20+dfsg-3
7.3.20+dfsg-4
7.3.21+dfsg-1
7.3.21+dfsg-2
7.3.21+dfsg-3
7.3.21+dfsg-4
7.3.22+dfsg-1
7.3.23+dfsg-1
7.3.23+dfsg-2

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-76875.json"