CVE-2026-46385
- Source
- https://cve.org/CVERecord?id=CVE-2026-46385
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46385.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-46385
- Aliases
- Published
- 2026-05-29T19:58:59.667Z
- Modified
- 2026-07-08T08:13:38.611715251Z
- Severity
-
- 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- iskorotkov/avro: CPU Exhaustion in Avro Decoder
- Details
-
iskorotkov/avro is a fast Go Avro codec. Prior to 2.33.0, the Avro array and map decoders looped over an attacker-controlled block-count value without checking the underlying reader's error state inside the loop body. Reader.ReadBlockHeader returns the count as a Go int, which is 64-bit on amd64 / arm64 targets — so a producer can declare a block of up to math.MaxInt64 (~9.2 × 10¹⁸) elements followed by EOF (or any truncated payload), and the decoder will attempt that many no-op iterations before propagating the error. The realistic ceiling is "indefinite until the worker is killed externally" — a single hostile payload pins a CPU core until the process is OOM-killed, deadline-cancelled, or terminated. Remote, unauthenticated denial-of-service. This vulnerability is fixed in 2.33.0.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46385.json", "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-400" ] }- References
-
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46385.json
- https://access.redhat.com/errata/RHSA-2026:30651
- https://access.redhat.com/security/cve/CVE-2026-46385
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46385.json
- https://github.com/iskorotkov/avro/security/advisories/GHSA-w8j3-pq8g-8m7w
- https://nvd.nist.gov/vuln/detail/CVE-2026-46385
- https://bugzilla.redhat.com/show_bug.cgi?id=2483475