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Highest advisory severityHigh 2 vendors · 2 advisories

CVE-2026-33630

CVE-2026-33630: 2 tracked advisory records across NetApp, Red Hat. Compare vendor sources and published fix guidance.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Vendor advisory comparison

NetApp

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-33630] c-ares Vulnerability in NetApp Products

    NTAP-20260731-0015Source published Source updated

    C-ares versions higher than 1.32.3 are susceptible to a vulnerability which when successfully exploited could lead to Denial of Service (DoS). Successful exploitation of this vulnerability could lead to Denial of Service (DoS). NetApp reports that one or more additional products remain under investigation; review the canonical advisory for current status. NetApp states there is no workaround available at this time.

    Affected products in this advisory
    No product details extracted. Check the source bulletin.
    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    No fixed-version detail extracted. This does not mean no fix exists.
    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Full advisory and evidenceOpen source bulletin

Red Hat

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-33630] Use-after-free / double-free in query-completion handling

    CVE-2026-33630Source published Source updated

    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. A flaw was found in c-ares. A remote attacker can exploit this via ares_getaddrinfo() over TCP by sending crafted DNS responses that force an EDNS-downgrade retry followed by a connection reset, causing the internal…

    Affected products in this advisory
    • Red Hat Enterprise Linux 10
    • Red Hat Hardened Images
    • Red Hat Enterprise Linux 6
    • Red Hat package: c-ares
    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • 1.34.7
    • c-ares-0:1.34.6-2.el10_2
    • c-ares-main-1.34.7-1.hum1
    • RHSA-2026:42096

    1 more entries in the full advisory.

    Mitigation guidance
    • There is no complete mitigation for the remotely-triggered path. As a partial mitigation, use trusted DNS resolvers reached over a trusted transport (e.g., DNS-over-TLS). Avoid calling ares_cancel() from within a query callback to prevent the application-triggered path. Upgrade to c-ares 1.34.7 or later.
    Full advisory and evidenceOpen source bulletin

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