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CVE-2026-39979

MEDIUM · CVSS 6.9 · Analyzed

Published: 2026-04-13 · Updated: 2026-10-26 · Source: NVD

Stored catalog record

Source record retrieved 2026-10-28T10:18:56.384947+00:00. Scheduled imports handle updates; this page does not assert that the provider was queried just now.

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Vulnerability overview

jq is a command-line JSON processor. In commits before 2f09060afab23fe9390cce7cb860b10416e1bf5f, the jv_parse_sized() API in libjq accepts a counted buffer with an explicit length parameter, but its error-handling path formats the input buffer using %s in jv_string_fmt(), which reads until a NUL terminator is found rather than respecting the caller-supplied length. This means that when malformed JSON is passed in a non-NUL-terminated buffer, the error construction logic performs an out-of-bounds read past the end of the buffer. The vulnerability is reachable by any libjq consumer calling jv_parse_sized() with untrusted input, and depending on memory layout, can result in memory disclosure or process termination. The issue has been patched in commit 2f09060afab23fe9390cce7cb860b10416e1bf5f.

Patch review priority

Assess exposure and vendor guidance

  • No higher-priority signal is available in the current stored evidence.

FIRST EPSS: 0.56% · percentile 46.4 · score date 2026-10-27.

EPSS estimates probability of exploitation in the next 30 days. It does not measure your exposure or prove exploitation. The elevated threshold is 10%; CISA KEV takes precedence. About FIRST EPSS ↗

Severity and scoring

CVSS score
6.9 · MEDIUM
CVSS version
4.0
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weaknesses
CWE-125

CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.

Known exploitation and remediation

Not listed in the CISA catalog retrieved for this record. This does not establish that exploitation has not occurred.

Verify affected versions and patch availability in the vendor advisory before making changes.

Affected products and versions

  • cpe:2.3:a:jqlang:jq:*:*:*:*:*:*:*:*

    Before (exclusive): 1.8.2

  • cpe:2.3:a:redhat:ai_inference_server:*:*:*:*:*:*:*:*

    From (inclusive): 3.2.0

    Before (exclusive): 3.2.2

  • cpe:2.3:a:redhat:ai_inference_server:*:*:*:*:*:*:*:*

    From (inclusive): 3.3.0

    Before (exclusive): 3.3.5

  • cpe:2.3:a:redhat:ansible_automation_platform:2.0:*:*:*:*:*:*:*

  • cpe:2.3:a:redhat:ceph_storage:4.0:*:*:*:*:*:*:*

  • cpe:2.3:a:redhat:codeready_linux_builder:8.0:*:*:*:*:*:*:*

  • cpe:2.3:a:redhat:codeready_linux_builder:9.0:*:*:*:*:*:*:*

  • cpe:2.3:a:redhat:codeready_linux_builder:10.0:*:*:*:*:*:*:*

  • cpe:2.3:a:redhat:codeready_linux_builder_eus:9.4:*:*:*:*:*:*:*

  • cpe:2.3:a:redhat:codeready_linux_builder_eus:9.6:*:*:*:*:*:*:*

  • cpe:2.3:a:redhat:codeready_linux_builder_eus:10.0:*:*:*:*:*:*:*

  • cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*

  • cpe:2.3:a:redhat:openshift_ai:*:*:*:*:*:*:*:*

    From (inclusive): 3.4

    Before (exclusive): 3.4.3

  • cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*

    From (inclusive): 4.12

    Before (exclusive): 4.12.92

  • cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*

    From (inclusive): 4.13

    Before (exclusive): 4.13.68

  • cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*

    From (inclusive): 4.14

    Before (exclusive): 4.14.68

  • cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*

    From (inclusive): 4.15

    Before (exclusive): 4.15.65

  • cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*

    From (inclusive): 4.16

    Before (exclusive): 4.16.64

  • cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*

    From (inclusive): 4.17

    Before (exclusive): 4.17.55

  • cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*

    From (inclusive): 4.18

    Before (exclusive): 4.18.44

  • cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*

    From (inclusive): 4.19

    Before (exclusive): 4.19.33

  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux_aus:8.4:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux_aus:8.6:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux_eus:9.4:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux_eus:9.6:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux_eus:10.0:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux_tus:8.6:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux_tus:8.8:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:8.6:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:8.8:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:9.0:*:*:*:*:*:*:*

  • cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:9.2:*:*:*:*:*:*:*

These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.

Advisories and references

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Read the official NVD record ↗

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