CVE-2026-5265 (GCVE-0-2026-5265)

Vulnerability from cvelistv5 – Published: 2026-04-24 12:25 – Updated: 2026-06-17 22:00
VLAI
Title
Ovn: ovn: heap over-read in icmp error response generation
Summary
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.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-130 - Improper Handling of Length Parameter Inconsistency
Assigner
References
Impacted products
Vendor Product Version
Red Hat Fast Datapath for Red Hat Enterprise Linux 10 Unaffected: 0:25.03.2-100.el10fdp , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10::fastdatapath
 Create a notification for this product.
Red Hat Fast Datapath for Red Hat Enterprise Linux 10 Unaffected: 0:25.09.2-103.el10fdp , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10::fastdatapath
 Create a notification for this product.
Red Hat Fast Datapath for Red Hat Enterprise Linux 8 Unaffected: 0:21.12.0-145.el8fdp , < * (rpm)
    cpe:/o:redhat:enterprise_linux:8::fastdatapath
 Create a notification for this product.
Red Hat Fast Datapath for Red Hat Enterprise Linux 8 Unaffected: 0:23.06.4-30.el8fdp , < * (rpm)
    cpe:/o:redhat:enterprise_linux:8::fastdatapath
 Create a notification for this product.
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 Unaffected: 0:23.06.4-30.el9fdp , < * (rpm)
    cpe:/o:redhat:enterprise_linux:9::fastdatapath
 Create a notification for this product.
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 Unaffected: 0:23.09.6-16.el9fdp , < * (rpm)
    cpe:/o:redhat:enterprise_linux:9::fastdatapath
 Create a notification for this product.
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 Unaffected: 0:24.03.7-82.el9fdp , < * (rpm)
    cpe:/o:redhat:enterprise_linux:9::fastdatapath
 Create a notification for this product.
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 Unaffected: 0:25.03.2-100.el9fdp , < * (rpm)
    cpe:/o:redhat:enterprise_linux:9::fastdatapath
 Create a notification for this product.
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 Unaffected: 0:25.09.2-103.el9fdp , < * (rpm)
    cpe:/o:redhat:enterprise_linux:9::fastdatapath
 Create a notification for this product.
Red Hat Fast Datapath for RHEL 7     cpe:/o:redhat:enterprise_linux:7::fastdatapath
 Create a notification for this product.
Red Hat Fast Datapath for RHEL 8     cpe:/o:redhat:enterprise_linux:8::fastdatapath
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Red Hat Fast Datapath for RHEL 9     cpe:/o:redhat:enterprise_linux:9::fastdatapath
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Date Public
2026-04-06 00:00
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}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.