# CASCA evidence receipt — CVE-2023-42917

- Generation: `gen-409cbd0c74ff4feb70e4944e6b98ce40`
- As known: 2026-07-21T08:13:17.697275+00:00
- Comparison: gen-56ccdaf914f7b4be95b689ccae7dc20d
- Score policy: public-priority-v1.0.1
- Conflict: not observed in this generation

## Source assertions

- **apple** (original_assertion): container — A memory corruption vulnerability was addressed with improved locking. This issue is fixed in iOS 17.1.2 and iPadOS 17.1.2, macOS Sonoma 14.1.2, Safari 17.1.2. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2023-42917
- **CISA-ADP** (independent_enrichment): container — CISA ADP Vulnrichment
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2023-42917
- **CVE** (derivative_copy): container — CVE Program Container
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2023-42917
- **CISA KEV** (original_assertion): observed_exploitation — Apple Multiple Products WebKit Memory Corruption Vulnerability
  - Observed: 2026-07-19T04:54:04.25158+00:00
  - Citation: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- **FIRST EPSS** (original_assertion): model_probability — Probability 0.093700000000; percentile 0.948470000000
  - Observed: 2026-07-19T04:54:35.756809+00:00
  - Citation: https://www.first.org/epss/data_stats.html

## CVSS assessments

- **nvd@nist.gov** (Primary, CVSS 3.1): 8.8 — score eligible
  - Evidence class: nvd_enrichment_exact; source rank: 0
  - Validation: valid_match
  - Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
- **134c704f-9b21-4f2e-91b3-4a467353bcc0** (Secondary, CVSS 3.1): 8.8 — score eligible
  - Evidence class: registered_adp_or_other; source rank: 2
  - Validation: valid_match
  - Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
- **CISA-ADP** (unknown, CVSS 3.1): 8.8 — display only
  - Evidence class: direct_cve_record_display_only; source rank: not applicable
  - Validation: display-only direct record assessment
  - Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`

## Applicability scope

- **Apple · iOS and iPadOS** (direct_source; unknown)
  - Versions: [{"status": "affected", "version": "unspecified", "lessThan": "17.1", "versionType": "custom"}]
- **Apple · macOS** (direct_source; unknown)
  - Versions: [{"status": "affected", "version": "unspecified", "lessThan": "14.1", "versionType": "custom"}]
- **Apple · Safari** (direct_source; unknown)
  - Versions: [{"status": "affected", "version": "unspecified", "lessThan": "17.1", "versionType": "custom"}]
- **apple · ipados** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (< 15.8.1); Any version (unconstrained) (>= 16.0, < 16.7.3); Any version (unconstrained) (>= 17.0, < 17.1.2)
  - Canonical identity: `product-8e7094ac066248cd4828b6ec8e3a96d010ed1c68f6083af46638775d737da0ad`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*`
- **apple · iphone_os** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (< 15.8.1); Any version (unconstrained) (>= 16.0, < 16.7.3); Any version (unconstrained) (>= 17.0, < 17.1.2)
  - Canonical identity: `product-665d7155d02581979844685e7fca6c2680af997f9200af455887b1c71c483272`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*`
- **apple · macos** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (>= 14.0, < 14.1.2)
  - Canonical identity: `product-d6f53ba981bb58ea2b0d24855b8ff4a18555e3a17a9dce0d38460a69537bbc63`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*`
- **apple · safari** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (< 17.1.2)
  - Canonical identity: `product-3c7772db507b09c802755f0f7a9c9fce988300ebb3425947843e4ccbcfe8ffed`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*`
- **debian · debian_linux** (vulnerable_target; supported)
  - Versions: Version 11.0; Version 12.0
  - Canonical identity: `product-3ccb4bc87dfae98fa2f2a06435fe5b3d9be78572fb958a89f2d7a96b4066447e`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*`
- **fedoraproject · fedora** (vulnerable_target; supported)
  - Versions: Version 38; Version 39
  - Canonical identity: `product-c96c7662a6606ed7594747da3d7ba9ee3a9758ab11658f6a3f42616361472e47`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*`
- **webkitgtk · webkitgtk+** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (< 2.42.3)
  - Canonical identity: `product-512d40816d7f70ea0f0496be1beb732b0d8ceefdb9d8578251216bc90825615f`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:webkitgtk:webkitgtk\+:*:*:*:*:*:*:*:*`

## Identity source boundaries

- **cpe_dictionary**: 1775266 records through 2026-07-21T06:45:29.809553+00:00
  - Run: `27d65b0f-b718-4b4f-bb79-c47c68d09dfa`
- **cpe_match**: 643502 records through 2026-07-21T08:13:17.697275+00:00
  - Run: `955dae73-7302-438b-aee1-058d7cc5d48e`

## Limitations and unknowns

- KEV membership is authoritative for the catalog, not proof of exposure in any environment.
- EPSS is a dated model probability and not an individual-environment prediction.
- Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
- NVD-carried upstream facts remain derivative and are not independent corroboration.
- Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
- NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
- Factor D remains unknown because WC-03 has not converted canonical CPE mappings into generation-bound mapping obligations; canonical identity alone does not score applicability.
- Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.

Generated from CASCA normalized evidence. This receipt is not proof that an asset is affected, unaffected, safe, or fixed.