CVE-2022-49048 (GCVE-0-2022-49048)
Vulnerability from cvelistv5
Published
2025-02-26 01:54
Modified
2026-10-15 21:21
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix panic when forwarding a pkt with no in6 dev kongweibin reported a kernel panic in ip6_forward() when input interface has no in6 dev associated. The following tc commands were used to reproduce this panic: tc qdisc del dev vxlan100 root tc qdisc add dev vxlan100 root netem corrupt 5%
References
Impacted products
Vendor Product Version
Linux Linux Version: bff0854e2f804f68d3e93d19e4580dbd69777e1d
Version: 7f4848229e91d508102b30396b8a1b710ac23637
Version: 79ec7b5b2f4fe38e5c7459ed0bdff4ef3386ab63
Version: ccd27f05ae7b8ebc40af5b004e94517a919aa862
Version: ccd27f05ae7b8ebc40af5b004e94517a919aa862
Version: ccd27f05ae7b8ebc40af5b004e94517a919aa862
Version: 350e10d217337480158b604bbf6601c50ed161c6
Version: 4.19.199   ≤
Version: 5.4.136   ≤
Version: 5.10.54   ≤
Version: 5.13.6   ≤
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              "value": "AV:N - ip6_forward runs on the IPv6 forwarding path (ipv6_rcv \u2192 ip6_rcv_finish \u2192 dst_input \u2192 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\u2014an expected case the function already uses __in6_dev_get_safely for\u2014an 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-\u003ecnf.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 packets."
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    "dateReserved": "2025-02-26T01:49:39.242Z",
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