DEBIAN-CVE-2026-39956

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Source
https://security-tracker.debian.org/tracker/CVE-2026-39956
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39956.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-39956
Upstream
  • CVE-2026-39956
Published
2026-04-13T23:16:27.653Z
Modified
2026-05-25T10:00:08.197841102Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H CVSS Calculator
Summary
[none]
Details

jq is a command-line JSON processor. In commits after 69785bf77f86e2ea1b4a20ca86775916889e91c9, the strindices builtin in jq's src/builtin.c passes its arguments directly to jvstringindexes() without verifying they are strings, and jvstring_indexes() in src/jv.c relies solely on assert() checks that are stripped in release builds compiled with -DNDEBUG. This allows an attacker to crash jq trivially with input like _strindices(0), and by crafting a numeric value whose IEEE-754 bit pattern maps to a chosen pointer, achieve a controlled pointer dereference and limited memory read/probe primitive. Any deployment that evaluates untrusted jq filters against a release build is vulnerable. This issue has been patched in commit fdf8ef0f0810e3d365cdd5160de43db46f57ed03.

References

Affected packages

Debian:11 / jq

Package

Name
jq
Purl
pkg:deb/debian/jq?arch=source&distro=bullseye

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.6-2.1+deb11u2

Affected versions

1.*
1.6-2.1
1.6-2.1+deb11u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39956.json"

Debian:12 / jq

Package

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

Affected ranges

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

Affected versions

1.*
1.6-2.1
1.6-2.1+deb12u1
1.6-3
1.7-1
1.7.1-1
1.7.1-2
1.7.1-3
1.7.1-4
1.7.1-5
1.7.1-6
1.8.0-1
1.8.1-1
1.8.1-2
1.8.1-3
1.8.1-4
1.8.1-5
1.8.1-6

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39956.json"

Debian:13 / jq

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.7.1-6+deb13u2

Affected versions

1.*
1.7.1-6+deb13u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39956.json"

Debian:14 / jq

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.8.1-5

Affected versions

1.*
1.8.0-1
1.8.1-1
1.8.1-2
1.8.1-3
1.8.1-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39956.json"