CVE-2022-49728 ipv6: Fix signed integer overflow in __ip6_append_data

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Multiple CVEs Address UAF Vulnerabilities in IPv6 Stack Four new Common Vulnerabilities and Exposures (CVEs) related to IPv6 have been published, addressing potential use-after-free (UAF) vulnerabilities in various functions of the IPv6 stack. The affected CVEs include CVE-2024-44986, CVE-2024-44985, and CVE-2024-44987, all published on September 4, 2024, and CVE-2022-49728, published on February 26, 2025. These vulnerabilities could impact systems utilizing the IPv6 protocol, necessitating prompt updates to mitigate risks. 5 sources 39