CVE-2023-32373 — Apple Multiple Products WebKit Use-After-Free Vulnerability

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

CISA required action CISA

Apply updates per vendor instructions.

US federal deadline: Jun 12, 2023 — passed 1221 day(s) ago

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

1. Identify exposed assets running the affected vendor/product/version combinations (Apple iOS and iPadOS, Apple Ipados, Apple Iphone Os…).
2. Treat as emergency remediation: the CVE is in CISA KEV (confirmed exploitation).
3. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
4. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
5. Exploitation requires user interaction: tighten email/web filtering and warn affected users.
6. EPSS ahead of 96% of scored CVEs: prioritize it in the patch queue.
7. Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-416 · Use After Free

Other CVEs with this weakness →

CISA KEV details CISA

CISA lists a CVE once it has evidence of exploitation against real targets.

CISA records ransomware use only for campaigns it has confirmed, so “Unknown” means unrecorded, not ruled out. The deadline binds US federal agencies; for everyone else it is a reference date.

EPSS over time FIRST

Oct 12, 2026 → Oct 14, 2026 · 3 reading(s) · max 12.17%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

• Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
• Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.
• Hunt retroactively in logs from before May 22, 2023 (KEV listing): exploitation may have started earlier.

Timeline

What happened to this CVE, newest first.

• 2026
• Affected products added · apple/macos, apple/safari, apple/watchos, apple/ios and ipados, apple/tvos
  Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
• SSVC assessment updated
  Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
• Record published
  Oct 13, 2026
• Affected products added · apple/safari, apple/ipados, apple/iphone os, apple/macos, apple/tvos, apple/watchos, redhat/enterprise linux, webkitgtk/
  Oct 13, 2026 · NIST National Vulnerability Database
• CVSS changed · 8.8
  Oct 13, 2026 · NIST National Vulnerability Database
• Source status changed · → Analyzed
  Oct 13, 2026 · NIST National Vulnerability Database
• Added to CISA KEV (detected)
  Oct 13, 2026 · CISA Known Exploited Vulnerabilities
• Record created in this database
  Oct 13, 2026 · CISA Known Exploited Vulnerabilities
• 2023
• CVE published
  Jun 23, 2023 · apple
• Added to CISA KEV catalog
  May 21, 2023 · CISA

Source activity

Repeated readings are counted rather than listed.

• 2× References added · Oct 13, 2026 – Oct 13, 2026
• 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

10 on the record

• support.apple.com/en-us/HT213761
  Release Notes, Vendor Advisory, NIST National Vulnerability Database
• support.apple.com/en-us/HT213762
  Release Notes, Vendor Advisory, NIST National Vulnerability Database
• support.apple.com/en-us/HT213764
  Release Notes, Vendor Advisory, NIST National Vulnerability Database
• support.apple.com/en-us/HT213758
  Release Notes, Vendor Advisory, NIST National Vulnerability Database
• support.apple.com/en-us/HT213757
  Release Notes, Vendor Advisory, NIST National Vulnerability Database
• support.apple.com/en-us/HT213765
  Release Notes, Vendor Advisory, NIST National Vulnerability Database
• www.cisa.gov/known-exploited-vulnerabilities-catalog
  US Government Resource, NIST National Vulnerability Database
• security.gentoo.org/glsa/202401-04
  Third Party Advisory, NIST National Vulnerability Database
• github.com/advisories/GHSA-3x5r-c923-f923
  GitHub Security Advisories
• nvd.nist.gov/vuln/detail/CVE-2023-32373
  GitHub Security Advisories

Elsewhere on this site

Related CVEs (same products)

• Medium CVE-2026-104046 Sssd: sssd: denial of service via incomplete identity provider authentication requests 8d
• Medium CVE-2026-104045 Sssd: sssd: denial of service via race condition in autofs responder 8d
• High CVE-2026-104048 Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation 8d
• Medium CVE-2026-104047 Sssd: sssd: information disclosure via query injection in entra id lookups 8d
• High CVE-2026-102558 Libsoup: libsoup: heap buffer overflow during websocket receive-buffer growth 16d
• High CVE-2026-102555 Libsoup: libsoup: heap buffer overflow via uninitialized length in data-uri base64 decoding 16d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

• No fixed version, patch or mitigation documented.
• No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
• No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
• No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2023-32373 is "Apple Multiple Products WebKit Use-After-Free Vulnerability", rated High. It affects iOS and iPadOS (Apple); versions are in the scope table. It is in CISA KEV: there is evidence of real-world exploitation. CVSS 8.8 describes technical severity. EPSS 12.17% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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