CVE-2023-26464
Apache Log4j 1.x (EOL) allows DoS in Chainsaw and SocketAppender
- Published
- Updated
- Reserved
- Assigned by
- apache
Description
** UNSUPPORTED WHEN ASSIGNED ** When using the Chainsaw or SocketAppender components with Log4j 1.x on JRE less than 1.7, an attacker that manages to cause a logging entry involving a specially-crafted (ie, deeply nested) hashmap or hashtable (depending on which logging component is in use) to be processed could exhaust the available memory in the virtual machine and achieve Denial of Service when the object is deserialized. This issue affects Apache Log4j before 2. Affected users are recommended to update to Log4j 2.x. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.9% · top 20% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
Apache Software Foundation · Apache Log4j
- affected 1.0.4 – < 2
- unaffected 2 – ≤ *
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenlog4j:log4jGHSA-vp98-w2p3-mv35 (opens in a new tab)
- Mavenorg.apache.logging.log4j:log4j-coreGHSA-vp98-w2p3-mv35 (opens in a new tab)
References (2)
- https://lists.apache.org/thread/wkx6grrcjkh86crr49p4blc1v1nflj3t (opens in a new tab)vendor-advisoryx_transferred
- https://security.netapp.com/advisory/ntap-20230505-0008/ (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-vp98-w2p3-mv35 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-26464)Record last updated .