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Ovn: ovn: heap over-read in icmp error response generation (Red Hat Fast Datapath for Red Hat Enterprise Linux 10)

CVE-2026-5265
MEDIUM 6.5

At a glance

Source
NVD
EPSS
EPSS 0.63 % · percentile 50 ()
State
PUBLISHED
Published
Updated
Assigner
redhat
NVD status
Awaiting Analysis

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Description

When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header's self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. A VM can send a short packet with an inflated IP length field that triggers an ICMP error (e.g., by hitting a reject ACL), causing ovn-controller to read heap memory beyond the valid packet data and include it in the ICMP response sent back to the VM.

Weaknesses (CWE)

  • CWE-130 — Improper Handling of Length Parameter Inconsistency

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 6.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:Hredhat
CVSS 3.1MEDIUM 6.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:HNVD · secalert@redhat.com (Secondary)

European references

Affected products

ProductVersions
Red Hat · Fast Datapath for Red Hat Enterprise Linux 10unaffected 0:25.03.2-100.el10fdp < *
Red Hat · Fast Datapath for Red Hat Enterprise Linux 10unaffected 0:25.09.2-103.el10fdp < *
Red Hat · Fast Datapath for Red Hat Enterprise Linux 8unaffected 0:21.12.0-145.el8fdp < *
Red Hat · Fast Datapath for Red Hat Enterprise Linux 8unaffected 0:23.06.4-30.el8fdp < *
Red Hat · Fast Datapath for Red Hat Enterprise Linux 9unaffected 0:23.06.4-30.el9fdp < *
Red Hat · Fast Datapath for Red Hat Enterprise Linux 9unaffected 0:23.09.6-16.el9fdp < *
Red Hat · Fast Datapath for Red Hat Enterprise Linux 9unaffected 0:24.03.7-82.el9fdp < *
Red Hat · Fast Datapath for Red Hat Enterprise Linux 9unaffected 0:25.03.2-100.el9fdp < *
Red Hat · Fast Datapath for Red Hat Enterprise Linux 9unaffected 0:25.09.2-103.el9fdp < *
Red Hat · Fast Datapath for RHEL 7
Red Hat · Fast Datapath for RHEL 7
Red Hat · Fast Datapath for RHEL 7
Red Hat · Fast Datapath for RHEL 8
Red Hat · Fast Datapath for RHEL 8
Red Hat · Fast Datapath for RHEL 8
Red Hat · Fast Datapath for RHEL 8
Red Hat · Fast Datapath for RHEL 8
Red Hat · Fast Datapath for RHEL 8
Red Hat · Fast Datapath for RHEL 8
Red Hat · Fast Datapath for RHEL 8

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD