CVE-2026-5265
MediumCVSS 6.5Summary
Podatność CVE-2026-5265 dotyczy błędu w obsłudze odpowiedzi ICMP 'Destination Unreachable' lub 'Packet Too Big', gdzie nieprawidłowo kopiowane są dane z oryginalnego pakietu do ciała błędu ICMP. Problem wynika z braku walidacji długości pakietu w stosunku do rzeczywistego rozmiaru bufora pakietu.
Risk Assessment
Atakujący może wysłać skrócony pakiet z zawyżonym polem długości IP, co prowadzi do odczytu pamięci sterty poza ważnymi danymi pakietu. Może to skutkować ujawnieniem wrażliwych informacji lub destabilizacją systemu.
Recommendation
Zaleca się wprowadzenie walidacji długości pakietu w obsłudze odpowiedzi ICMP, aby upewnić się, że nie są kopiowane dane poza dozwolony zakres pamięci.
Related vulnerabilities
- CVE-2026-81797Critical
The WordPress theme Buzz Stone | Magazine & Viral Blog in versions up to 1.0.2 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-78535Critical
The WordPress theme Photolia in versions up to 1.0.3 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-78533Critical
The WordPress theme Qwery in versions up to 3.6.1 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-78531Critical
The WordPress theme Jacqueline in versions up to 2.22 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-78529Critical
The WordPress theme Alliance in versions up to 3.11 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-66569Critical
The WordPress theme Kicker in versions up to 2.2.1 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-66568Critical
The WordPress theme Original in versions up to 1.9.0 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-66567Critical
The WordPress theme Anesta in versions up to 1.5.3 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-66565Critical
The WordPress theme FC United in versions up to 1.1.1 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-66564Critical
The WordPress theme ShiftCV in versions up to 3.0.14 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS