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-2026:18044) for jq, addressing two vulnerabilities: CVE-2026-39979 involves an out-of-bounds read in the jv_parse_sized() function when handling error formatting for non-NUL-terminated buffers, and CVE-2026-40164 involves a denial of service attack via crafted JSON objects causing hash collisions. These vulnerabilities affect jq packages in Red Hat Enterprise Linux 9.2 across various architectures including x86_64, ppc64le, aarch64, and s390x. The advisory provides updated jq packages to remediate these issues. No CVSS scores are provided in the advisory, but the severity is rated as Important by Red Hat.
Potential Impact
The out-of-bounds read vulnerability (CVE-2026-39979) could lead to potential memory safety issues when jq processes malformed JSON data. The denial of service vulnerability (CVE-2026-40164) allows an attacker to cause jq to consume excessive resources or crash by submitting specially crafted JSON objects that cause hash collisions. These issues could disrupt applications or systems relying on jq for JSON processing.
Mitigation Recommendations
Red Hat has released updated jq packages for Red Hat Enterprise Linux 9.2 that address these vulnerabilities. Users should apply the security update as described in the Red Hat advisory RHSA-2026:18044 and the referenced article https://access.redhat.com/articles/11258 to remediate these issues. No additional mitigations are indicated by the vendor advisory.
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-2026:18044) for jq, addressing two vulnerabilities: CVE-2026-39979 involves an out-of-bounds read in the jv_parse_sized() function when handling error formatting for non-NUL-terminated buffers, and CVE-2026-40164 involves a denial of service attack via crafted JSON objects causing hash collisions. These vulnerabilities affect jq packages in Red Hat Enterprise Linux 9.2 across various architectures including x86_64, ppc64le, aarch64, and s390x. The advisory provides updated jq packages to remediate these issues. No CVSS scores are provided in the advisory, but the severity is rated as Important by Red Hat.
Potential Impact
The out-of-bounds read vulnerability (CVE-2026-39979) could lead to potential memory safety issues when jq processes malformed JSON data. The denial of service vulnerability (CVE-2026-40164) allows an attacker to cause jq to consume excessive resources or crash by submitting specially crafted JSON objects that cause hash collisions. These issues could disrupt applications or systems relying on jq for JSON processing.
Mitigation Recommendations
Red Hat has released updated jq packages for Red Hat Enterprise Linux 9.2 that address these vulnerabilities. Users should apply the security update as described in the Red Hat advisory RHSA-2026:18044 and the referenced article https://access.redhat.com/articles/11258 to remediate these issues. No additional mitigations are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:18044
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-40164"]
- Cvss Version
- null
Threat ID: 6a1f4e85e29bf47b5007dc52
Added to database: 06/02/2026, 21:43:33 UTC
Last enriched: 07/10/2026, 12:58:42 UTC
Last updated: 07/31/2026, 19:24:46 UTC
Views: 45
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