High
Memory corruption
CVE-2022-23308 — valid.c in libxml2 before 2.9.13 has a use-after-free of ID and IDREF attributes.
valid.c in libxml2 before 2.9.13 has a use-after-free of ID and IDREF attributes.
23
Low
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
No exploitation signal in the sources consulted so far.
How the score was calculated
- EPSS 5.1% (30-day exploitation probability)+14
- Technical severity (high)+6
- Automatable exploitation (SSVC)+3
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
5.12%
ahead of 92% of scored CVEs · Oct 14, 2026
Affects
Apple
Ipados and 34 more
CVSS base
7.5
High · 4 source(s)
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.
Exploitation
None
none · proof-of-concept · active
Automatable
Yes
can an attacker script the kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
- Documented patch — github.com (NIST National Vulnerability Database)
- Documented patch — www.oracle.com (NIST National Vulnerability Database)
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.
- Identify exposed assets running the affected vendor/product/version combinations (Apple Ipados, Apple Iphone Os, Apple Mac Os X…).
- The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
- Apply the fixed version or the patch documented under Remediation.
- EPSS ahead of 92% of scored CVEs: prioritize it in the patch queue.
- 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.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Apple | Ipados | < 15.5 | Vulnerable | NIST National Vulnerability Database |
| Apple | Iphone Os | < 15.5 | Vulnerable | NIST National Vulnerability Database |
| Apple | Mac Os X |
version 10.15.7-security_update_2021-007≥ 10.15.0 and < 10.15.7version 10.15.7version 10.15.7-security_update_2020-001version 10.15.7-security_update_2021-001version 10.15.7-security_update_2021-002version 10.15.7-security_update_2021-003version 10.15.7-security_update_2021-004 and 5 moreversion 10.15.7-security_update_2021-005version 10.15.7-security_update_2021-006version 10.15.7-security_update_2021-008version 10.15.7-security_update_2022-001version 10.15.7-security_update_2022-003 |
Vulnerable | NIST National Vulnerability Database |
| Apple | Macos | ≥ 12.0 and < 12.4≥ 11.6.0 and < 11.6.6 | Vulnerable | NIST National Vulnerability Database |
| Apple | Tvos | < 15.5 | Vulnerable | NIST National Vulnerability Database |
| Apple | Watchos | < 8.6 | Vulnerable | NIST National Vulnerability Database |
| Debian | Debian Linux | version 9.0 | Vulnerable | NIST National Vulnerability Database |
| Fedoraproject | Fedora | version 34 | Vulnerable | NIST National Vulnerability Database |
| Netapp | Active Iq Unified Manager | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | Bootstrap Os | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | Clustered Data Ontap | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | Clustered Data Ontap Antivirus Connector | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | H300e Firmware | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | H300s Firmware | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | H410c Firmware | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | H410s Firmware | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | H500e Firmware | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | H500s Firmware | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | H700e Firmware | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | H700s Firmware | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | Manageability Software Development Kit | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | Ontap Select Deploy Administration Utility | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | Smi-s Provider | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | Snapdrive | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | Snapmanager | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | Solidfire & Hci Management Node | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Netapp | Solidfire, Enterprise Sds & Hci Storage Node | versions not specified by the source | Vulnerable | NIST National Vulnerability Database |
| Oracle | Communications Cloud Native Core Binding Support Function | version 22.2.0 | Vulnerable | NIST National Vulnerability Database |
| Oracle | Communications Cloud Native Core Network Function Cloud Native Environment | version 22.1.0 | Vulnerable | NIST National Vulnerability Database |
| Oracle | Communications Cloud Native Core Network Repository Function | version 22.1.2version 22.2.0 | Vulnerable | NIST National Vulnerability Database |
| Oracle | Communications Cloud Native Core Network Slice Selection Function | version 22.1.1 | Vulnerable | NIST National Vulnerability Database |
| Oracle | Communications Cloud Native Core Unified Data Repository | version 22.2.0 | Vulnerable | NIST National Vulnerability Database |
| Oracle | Mysql Workbench | ≤ 8.0.29 | Vulnerable | NIST National Vulnerability Database |
| Oracle | Zfs Storage Appliance Kit | version 8.8 | Vulnerable | NIST National Vulnerability Database |
| Xmlsoft | Libxml2 | < 2.9.13 | Vulnerable | NIST National Vulnerability Database |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 7.5 | CVSS 3.1 | High | 3.9 | 3.6 | nvd@nist.gov via NIST National Vulnerability Database |
| 7.5 | CVSS 3.1 | High | 3.9 | 3.6 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 via NIST National Vulnerability Database |
| 7.5 | CVSS 3.1 | High | — | — | GitHub, Inc. via GitHub Security Advisories |
| 7.5 | CVSS 3.1 | High | — | — | CISA-ADP via CVE Program (cve.org) e CISA ADP |
| 4.3 | CVSS 2.0 | Medium | 8.6 | 2.9 | nvd@nist.gov via NIST National Vulnerability Database |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (score shown at the top: nvd@nist.gov) Weakness MITRE
Weakness class according to MITRE’s CWE catalog.
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.
Timeline
What happened to this CVE, newest first.
- 2026
- SSVC assessment updated
- Record published
- Fix documented
- Affected products added · xmlsoft/libxml2, fedoraproject/fedora, debian/debian linux, apple/ipados, apple/iphone os, apple/mac os x, apple/macos,
- CVSS changed · 7.5
- Source status changed · → Modified
- Record created in this database
- 2022
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 2× References added · Oct 14, 2026 – Oct 14, 2026
- 1× Official description updated · Oct 14, 2026 – Oct 14, 2026
References
27 on the record
- www.oracle.com/security-alerts/cpujul2022.html
- github.com/GNOME/libxml2/commit/652dd12a858989b14eed4e84e453059cd3ba340e
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LA3MWW
- gitlab.gnome.org/GNOME/libxml2/-/blob/v2.9.13/NEWS
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LA3M
- seclists.org/fulldisclosure/2022/May/38
- support.apple.com/kb/HT213257
- support.apple.com/kb/HT213256
- support.apple.com/kb/HT213258
- seclists.org/fulldisclosure/2022/May/35
- lists.debian.org/debian-lts-announce/2022/04/msg00004.html
- support.apple.com/kb/HT213255
- support.apple.com/kb/HT213254
- security.netapp.com/advisory/ntap-20220331-0008
- support.apple.com/kb/HT213253
- cert-portal.siemens.com/productcert/html/ssa-419740.html
- github.com/advisories/GHSA-8v47-xfh7-92fh
- cert-portal.siemens.com/productcert/html/ssa-942865.html
- security.netapp.com/advisory/ntap-20220331-0008/
- nvd.nist.gov/vuln/detail/CVE-2022-23308
- security.gentoo.org/glsa/202210-03
- cert-portal.siemens.com/productcert/html/ssa-398330.html
- seclists.org/fulldisclosure/2022/May/36
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LA3M
- seclists.org/fulldisclosure/2022/May/33
- seclists.org/fulldisclosure/2022/May/34
- seclists.org/fulldisclosure/2022/May/37
Elsewhere on this site
Related CVEs (same products)
- High CVE-2026-86950 Apple Multiple Products Out-of-Bounds Write Vulnerability KEV 17d
- Medium CVE-2026-86911 Clickjacking in Apple Macos Sep 14, 2026
- Medium CVE-2026-86903 Out-of-bounds Read in Apple Ipados Sep 14, 2026
- Medium CVE-2026-86910 Path Traversal in Apple Macos Sep 14, 2026
- Medium CVE-2026-86909 A logic issue was addressed with improved state management. This issue is fixed in macOS… Sep 14, 2026
- Medium CVE-2026-86902 Path Traversal in Apple Macos Sep 14, 2026
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 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-2022-23308 is "valid.c in libxml2 before 2.9.13 has a use-after-free of ID and IDREF attributes.", rated High. It affects Ipados (Apple); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.5 describes technical severity. EPSS 5.12% 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.
Comments
Moderated technical discussion. Read the community guidelines.
No comments yet.
Sign in or create an account to comment and suggest corrections.