CVE-2026-33630

highpriority · track · 0EPSS 0.008 · 58 %ileDE
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.84% (58th) EPSS
CVSS 7.5 · high
Is it mine?
11 products
Check your exposure
Who says so?
1 sources
cert_bund

EPSS · scored 2026-10-27

c-ares is an asynchronous resolver library. From ver 1.32.3 until 1.34.7, a use-after-free / double-free in c-ares' query-completion handling. The same flaw — a query's callback being invoked while the query is still linked in the channel's internal lookup structures — is present at multiple points in the resend/finish path (timeout handling, response handling, and query dispatch). If the query, or for ares_getaddrinfo() the owning host_query, is freed as a side effect of that callback, it is then accessed and/or freed a second time. This vulnerability is fixed in ver 1.34.7.

01

cvss

Technical severity, 0–10. One row per scoring source.

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · security-advisories@github.comexploitability 3.9 · impact 3.6
v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-415USCWE-416US
04

affected products (11)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-2419Red Hat Enterprise Linux (sssd, glib, c-ares): Mehrere SchwachstellenDeutsch2026-07-20csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um Administratorrechte zu erlangen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren und einen Denial-of-Service-Zustand auszulösen.

06

sources

Which sources assert this record, and when.

cert_bundNVDCVE.orgMITRE
published 2026-09-03modified 2026-09-03
07

references (5) nvd

External citations — patches, advisories, analysis.

scry

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