{"id":"CVE-2022-49048","state":"PUBLISHED","title":"ipv6: fix panic when forwarding a pkt with no in6 dev","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix panic when forwarding a pkt with no in6 dev\n\nkongweibin reported a kernel panic in ip6_forward() when input interface\nhas no in6 dev associated.\n\nThe following tc commands were used to reproduce this panic:\ntc qdisc del dev vxlan100 root\ntc qdisc add dev vxlan100 root netem corrupt 5%","publishedAt":"2025-02-26T01:54:24.115Z","updatedAt":"2026-10-15T21:21:06.401Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bff0854e2f804f68d3e93d19e4580dbd69777e1d","status":"affected","lessThan":"74b68f5249f16c5f7f675d0f604fa6ae20e3a151","versionType":"git"},{"version":"7f4848229e91d508102b30396b8a1b710ac23637","status":"affected","lessThan":"ab2f5afb7af5c68389e8c7dd29e0a98fbeaaa435","versionType":"git"},{"version":"79ec7b5b2f4fe38e5c7459ed0bdff4ef3386ab63","status":"affected","lessThan":"a263712ba8c9ded25dd9d2d5ced11bcea5b33a3e","versionType":"git"},{"version":"ccd27f05ae7b8ebc40af5b004e94517a919aa862","status":"affected","lessThan":"adee01bbf6cb5b3e4ed08be8ff866aac90f13836","versionType":"git"},{"version":"ccd27f05ae7b8ebc40af5b004e94517a919aa862","status":"affected","lessThan":"e69fb3de87a8923e5931a272a38fa3cceb01da44","versionType":"git"},{"version":"ccd27f05ae7b8ebc40af5b004e94517a919aa862","status":"affected","lessThan":"e3fa461d8b0e185b7da8a101fe94dfe6dd500ac0","versionType":"git"},{"version":"350e10d217337480158b604bbf6601c50ed161c6","status":"affected","versionType":"git"},{"version":"4.19.199","status":"affected","lessThan":"4.19.239","versionType":"semver"},{"version":"5.4.136","status":"affected","lessThan":"5.4.190","versionType":"semver"},{"version":"5.10.54","status":"affected","lessThan":"5.10.112","versionType":"semver"},{"version":"5.13.6","status":"affected","lessThan":"5.14","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/ip6_output.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.14","versionType":"semver"},{"version":"4.19.239","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.190","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.112","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.35","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.4","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/ip6_output.c"]}],"references":["https://git.kernel.org/stable/c/74b68f5249f16c5f7f675d0f604fa6ae20e3a151","https://git.kernel.org/stable/c/ab2f5afb7af5c68389e8c7dd29e0a98fbeaaa435","https://git.kernel.org/stable/c/a263712ba8c9ded25dd9d2d5ced11bcea5b33a3e","https://git.kernel.org/stable/c/adee01bbf6cb5b3e4ed08be8ff866aac90f13836","https://git.kernel.org/stable/c/e69fb3de87a8923e5931a272a38fa3cceb01da44","https://git.kernel.org/stable/c/e3fa461d8b0e185b7da8a101fe94dfe6dd500ac0"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49048.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49048","state":"PUBLISHED","datePublished":"2025-02-26T01:54:24.115Z","dateUpdated":"2026-10-15T21:21:06.401Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T01:49:39.242Z"},"containers":{"cna":{"title":"ipv6: fix panic when forwarding a pkt with no in6 dev","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix panic when forwarding a pkt with no in6 dev\n\nkongweibin reported a kernel panic in ip6_forward() when input interface\nhas no in6 dev associated.\n\nThe following tc commands were used to reproduce this panic:\ntc qdisc del dev vxlan100 root\ntc qdisc add dev vxlan100 root netem corrupt 5%"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bff0854e2f804f68d3e93d19e4580dbd69777e1d","status":"affected","lessThan":"74b68f5249f16c5f7f675d0f604fa6ae20e3a151","versionType":"git"},{"version":"7f4848229e91d508102b30396b8a1b710ac23637","status":"affected","lessThan":"ab2f5afb7af5c68389e8c7dd29e0a98fbeaaa435","versionType":"git"},{"version":"79ec7b5b2f4fe38e5c7459ed0bdff4ef3386ab63","status":"affected","lessThan":"a263712ba8c9ded25dd9d2d5ced11bcea5b33a3e","versionType":"git"},{"version":"ccd27f05ae7b8ebc40af5b004e94517a919aa862","status":"affected","lessThan":"adee01bbf6cb5b3e4ed08be8ff866aac90f13836","versionType":"git"},{"version":"ccd27f05ae7b8ebc40af5b004e94517a919aa862","status":"affected","lessThan":"e69fb3de87a8923e5931a272a38fa3cceb01da44","versionType":"git"},{"version":"ccd27f05ae7b8ebc40af5b004e94517a919aa862","status":"affected","lessThan":"e3fa461d8b0e185b7da8a101fe94dfe6dd500ac0","versionType":"git"},{"version":"350e10d217337480158b604bbf6601c50ed161c6","status":"affected","versionType":"git"},{"version":"4.19.199","status":"affected","lessThan":"4.19.239","versionType":"semver"},{"version":"5.4.136","status":"affected","lessThan":"5.4.190","versionType":"semver"},{"version":"5.10.54","status":"affected","lessThan":"5.10.112","versionType":"semver"},{"version":"5.13.6","status":"affected","lessThan":"5.14","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/ip6_output.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.14","versionType":"semver"},{"version":"4.19.239","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.190","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.112","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.35","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.4","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/ip6_output.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/74b68f5249f16c5f7f675d0f604fa6ae20e3a151"},{"url":"https://git.kernel.org/stable/c/ab2f5afb7af5c68389e8c7dd29e0a98fbeaaa435"},{"url":"https://git.kernel.org/stable/c/a263712ba8c9ded25dd9d2d5ced11bcea5b33a3e"},{"url":"https://git.kernel.org/stable/c/adee01bbf6cb5b3e4ed08be8ff866aac90f13836"},{"url":"https://git.kernel.org/stable/c/e69fb3de87a8923e5931a272a38fa3cceb01da44"},{"url":"https://git.kernel.org/stable/c/e3fa461d8b0e185b7da8a101fe94dfe6dd500ac0"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - ip6_forward runs on the IPv6 forwarding path (ipv6_rcv → ip6_rcv_finish → dst_input → ip6_forward) for packets received from the network; on an IPv6 router/gateway this is reachable by a remote peer sending packets through the host.\nAC:L - With IPv6 forwarding enabled (the realistic worst-case deployment for this code) and an ingress interface lacking in6_dev—an expected case the function already uses __in6_dev_get_safely for—an attacker can deterministically hit the disable_policy dereference by sending forwardable IPv6 packets, with no race outside their control.\nPR:N - IP forwarding processes unauthenticated packet data with no capability check or session; a remote peer on a path through the router needs no local credentials.\nUI:N - Crafted packets are handled automatically in softirq receive/forward context; no victim user or admin action is required beyond the host already acting as an IPv6 forwarder.\nS:U - The NULL dereference and resulting oops stay within the same host kernel authority; there is no VM escape, IOMMU bypass, or other cross-boundary impact.\nC:N - This is a pure NULL pointer dereference of idev->cnf.disable_policy with no out-of-bounds read, UAF, or other disclosure primitive.\nI:N - The fault is a NULL pointer read with no write, memory corruption, or control-flow hijack primitive beyond the ensuing oops.\nA:H - Dereferencing NULL idev causes a kernel oops/panic in the forwarding path, which is high availability impact and can be retriggered by further 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