Vulnerability-Lookup

OPENSUSE-SU-2026:22135-1

Vulnerability from csaf_opensuse - Published: 2026-10-19 16:30 - Updated: 2026-10-21 11:53

Summary

Security update for coredns

Severity

Important

Notes

Title of the patch: Security update for coredns

Description of the patch: This update for coredns fixes the following issues: Changes in coredns: - Bump vendored google.golang.org/grpc from 1.83.0 to 1.83.1: * CVE-2026-84304: heap memory exhaustion via HTTP/2 DATA frame fragmentation in the gRPC transport (boo#1279216) * Done through the go_modules "require" parameter in _service - Update license tag to Apache-2.0 AND MPL-2.0 * outcome of legal review Update to version 1.14.6: * Test: populating build test failure * fix(auto): keep first matching zone file for duplicate origins * plugin/secondary: serve catalog member zones * plugin/tsig: don't echo client's TSIG.Error if verification is successful * docs(timeouts): document DoQ read timeout * plugin/dnstap: fix self-deadlock in listener broadcast on client flush error * core/dnsserver: bound DoQ stream read with the server read timeout * plugin/transfer: Fix panic in CoreDNS transfer plugin caused by empty DNS record * core/dnsserver: add Config.UDPDecorateWriterFunc for external plugins * plugin/kubernetes: fix AXFR panic when nsAddrs returns multiple records * plugin/hosts: fix data race between lookups and reload * core/dnsserver: sanitize DoH/DoH3 request parse errors * plugin/dnstap: close the previous connection before reconnecting * plugin/erratic: apply default truncate amount of 2 for bare `truncate` * Test: Fix flaky health test * plugin/pkg/response: classify nxdomain without soa as denial * plugin/file: return SOA in authority for negative CNAME target answers * plugin/forward: make per-upstream read timeout configurable * plugin/secondary: parse catalog zones after transfer * plugin/pkg/dnsutil: guard Join against an empty label slice * plugin/file: run additional processing for wildcard answers * fix(tls): use Go TLS defaults * plugin/secondary: stop update loop on reload shutdown * fix(8201): restore old behavior forward plugin continue on empty conf file * fix(forward): make dnstap FORWARDER_* describe the socket from CoreDNS to upstream * plugin/cache: add regression test for AD bit not partitioning the cache * fix(rewrite): restore the original question on empty replies * plugin/auto: warn on duplicate zone file origins * test: use dynamic ports in reload tests * plugin/transfer: configure notify source address * fix: accept scoped IPv6 addresses in transfer targets * fix(trace): correct Zipkin v2 endpoint docs * fix(log): synthesize deferred error responses * fix(dnstap): store IPv4-mapped IPv6 addresses as 4 octets with SocketFamily INET * plugin/hosts: add wildcard support * fix(local): handle names under .localhost. * plugin/hosts: fall through unsupported query types * plugin/rewrite: Fix nil-pointer panic in EDNS0 response reversion with no OPT record * feat(forward): add doh support * core/dnsserver: propagate HTTPRequestValidateFunc to all configs in a server block

Patchnames: openSUSE-Leap-16.0-packagehub-685

CVE-2026-84304

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:coredns-0:1.14.7-bp160.2.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:coredns-0:1.14.7-bp160.2.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:coredns-0:1.14.7-bp160.2.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:coredns-extras-0:1.14.7-bp160.2.1.noarch	—	Vendor Fix

Threats

Impact important

References

7 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://bugzilla.suse.com/1279216	self
https://www.suse.com/security/cve/CVE-2026-84304/	self
https://www.suse.com/security/cve/CVE-2026-84304	external
https://bugzilla.suse.com/1278271	external
https://bugzilla.suse.com/1280553	external

JSON

To clipboard

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}

CVE-2026-84304 (GCVE-0-2026-84304)

Vulnerability from cvelistv5 – Published: 2026-09-01 18:19 – Updated: 2026-09-01 19:24

Title

gRPC-Go: Heap Memory Exhaustion (OOM) via HTTP/2 DATA Frame Fragmentation

Summary

gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, internal/transport/transport.go stores each fragmented HTTP/2 DATA frame as a separate recvMsg in recvBuffer, so millions of one-byte frames can consume disproportionate heap memory even when payload bytes remain within connection and stream flow-control windows. An unauthenticated remote attacker can use concurrent multiplexed streams to exhaust process memory and cause a runtime panic or out-of-memory termination. Receive-buffer compaction is enabled by default and can be controlled temporarily with GRPC_GO_EXPERIMENTAL_ENABLE_RECEIVE_BUFFER_COMPACTION. This issue is fixed in version 1.83.1.

Severity

8.7 (High)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 19:23 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7774 records in the last 180 days details

References

6 references

URL	Tags
https://github.com/grpc/grpc-go/security/advisori…	x_refsource_CONFIRM
https://github.com/grpc/grpc-go/pull/9331	x_refsource_MISC
https://github.com/grpc/grpc-go/pull/9333	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/7354d9c8de…	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/8cfeca0e1e…	x_refsource_MISC
https://github.com/grpc/grpc-go/releases/tag/v1.83.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
grpc	grpc-go	Affected: < 1.83.1

Show details on NVD website

JSON

To clipboard

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            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
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            "x_refsource_MISC"
          ],
          "url": "https://github.com/grpc/grpc-go/pull/9331"
        },
        {
          "name": "https://github.com/grpc/grpc-go/pull/9333",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/grpc/grpc-go/pull/9333"
        },
        {
          "name": "https://github.com/grpc/grpc-go/commit/7354d9c8debb4bcf2225bf429857078de310c176",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/grpc/grpc-go/commit/7354d9c8debb4bcf2225bf429857078de310c176"
        },
        {
          "name": "https://github.com/grpc/grpc-go/commit/8cfeca0e1ee5ea0980dcc320e20240fa1079ec77",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/grpc/grpc-go/commit/8cfeca0e1ee5ea0980dcc320e20240fa1079ec77"
        },
        {
          "name": "https://github.com/grpc/grpc-go/releases/tag/v1.83.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/grpc/grpc-go/releases/tag/v1.83.1"
        }
      ],
      "source": {
        "advisory": "GHSA-vp52-pcj8-j9qc",
        "discovery": "UNKNOWN"
      },
      "title": "gRPC-Go: Heap Memory Exhaustion (OOM) via HTTP/2 DATA Frame Fragmentation"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-84304",
    "datePublished": "2026-09-01T18:19:10.100Z",
    "dateReserved": "2026-09-01T16:17:43.078Z",
    "dateUpdated": "2026-09-01T19:24:36.867Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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