Red Hat Security Advisory: jq security update
jq is a lightweight and flexible command-line JSON processor. jq is like sed for JSON data. You can use it to slice, filter, map, or transform structured data with the same ease that sed, awk, grep, or similar applications allow you to manipulate text. Security Fix(es): * jq: out-of-bounds read in jv_parse_sized() on error formatting for non-NUL-terminated buffers (CVE-2026-39979) * jq: jq: Denial of Service via crafted JSON object causing hash collisions (CVE-2026-40164) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
Red Hat Product Security released an advisory (RHSA-2026:18043) for jq, fixing two vulnerabilities: CVE-2026-39979, an out-of-bounds read in jv_parse_sized() when handling non-NUL-terminated buffers, and CVE-2026-40164, a denial of service via crafted JSON objects causing hash collisions. These vulnerabilities affect jq versions included in Red Hat Enterprise Linux 9.4 Extended Update Support and related CodeReady Linux Builder and SAP Solutions variants. The advisory provides updated packages to remediate these issues.
Potential Impact
The out-of-bounds read vulnerability (CVE-2026-39979) may lead to memory safety issues when jq processes malformed JSON data without proper NUL termination. The denial of service vulnerability (CVE-2026-40164) allows an attacker to cause jq to consume excessive resources by exploiting hash collisions in crafted JSON objects, potentially disrupting services relying on jq for JSON processing.
Mitigation Recommendations
Red Hat has released updated jq packages for Red Hat Enterprise Linux 9.4 Extended Update Support and related products that address these vulnerabilities. Users should apply these official updates as described in the Red Hat advisory (https://access.redhat.com/articles/11258) to remediate the issues. Patch status is confirmed as available via these updates.
Red Hat Security Advisory: jq security update
Description
jq is a lightweight and flexible command-line JSON processor. jq is like sed for JSON data. You can use it to slice, filter, map, or transform structured data with the same ease that sed, awk, grep, or similar applications allow you to manipulate text. Security Fix(es): * jq: out-of-bounds read in jv_parse_sized() on error formatting for non-NUL-terminated buffers (CVE-2026-39979) * jq: jq: Denial of Service via crafted JSON object causing hash collisions (CVE-2026-40164) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat Product Security released an advisory (RHSA-2026:18043) for jq, fixing two vulnerabilities: CVE-2026-39979, an out-of-bounds read in jv_parse_sized() when handling non-NUL-terminated buffers, and CVE-2026-40164, a denial of service via crafted JSON objects causing hash collisions. These vulnerabilities affect jq versions included in Red Hat Enterprise Linux 9.4 Extended Update Support and related CodeReady Linux Builder and SAP Solutions variants. The advisory provides updated packages to remediate these issues.
Potential Impact
The out-of-bounds read vulnerability (CVE-2026-39979) may lead to memory safety issues when jq processes malformed JSON data without proper NUL termination. The denial of service vulnerability (CVE-2026-40164) allows an attacker to cause jq to consume excessive resources by exploiting hash collisions in crafted JSON objects, potentially disrupting services relying on jq for JSON processing.
Mitigation Recommendations
Red Hat has released updated jq packages for Red Hat Enterprise Linux 9.4 Extended Update Support and related products that address these vulnerabilities. Users should apply these official updates as described in the Red Hat advisory (https://access.redhat.com/articles/11258) to remediate the issues. Patch status is confirmed as available via these updates.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:18043
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-40164"]
- Cvss Version
- null
Threat ID: 6a1f4e85e29bf47b5007dc75
Added to database: 06/02/2026, 21:43:33 UTC
Last enriched: 07/10/2026, 12:58:54 UTC
Last updated: 07/31/2026, 19:24:46 UTC
Views: 149
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