{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2022-49663 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2022-49663 is a medium-severity vulnerability in Linux kernel, published on 26 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2022-49663 and fix it if it is affected.\n\nWhat it is: CVE-2022-49663 is a medium-severity vulnerability in Linux kernel, published on 26 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2022-49663 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2022-49663/ (Markdown: https://insights.sbomify.com/CVE-2022-49663/index.md)","id":"CVE-2022-49663","markdown":"https://insights.sbomify.com/CVE-2022-49663/index.md","name":"CVE-2022-49663","record":{"aliases":["DEBIAN-CVE-2022-49663","GHSA-vrmp-g995-qwm3","UBUNTU-CVE-2022-49663"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A null pointer dereference in the Linux kernel tunneling code can cause a system crash when processing specific network packets.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntunnels: do not assume mac header is set in skb_tunnel_check_pmtu()\n\nRecently added debug in commit f9aefd6b2aa3 (\"net: warn if mac header\nwas not set\") caught a bug in skb_tunnel_check_pmtu(), as shown\nin this syzbot report [1].\n\nIn ndo_start_xmit() paths, there is really no need to use skb-\u003emac_header,\nbecause skb-\u003edata is supposed to point at it.\n\n[1] WARNING: CPU: 1 PID: 8604 at include/linux/skbuff.h:2784 skb_mac_header_len include/linux/skbuff.h:2784 [inline]\nWARNING: CPU: 1 PID: 8604 at include/linux/skbuff.h:2784 skb_tunnel_check_pmtu+0x5de/0x2f90 net/ipv4/ip_tunnel_core.c:413\nModules linked in:\nCPU: 1 PID: 8604 Comm: syz-executor.3 Not tainted 5.19.0-rc2-syzkaller-00443-g8720bd951b8e #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nRIP: 0010:skb_mac_header_len include/linux/skbuff.h:2784 [inline]\nRIP: 0010:skb_tunnel_check_pmtu+0x5de/0x2f90 net/ipv4/ip_tunnel_core.c:413\nCode: 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 80 3c 02 00 0f 84 b9 fe ff ff 4c 89 ff e8 7c 0f d7 f9 e9 ac fe ff ff e8 c2 13 8a f9 \u003c0f\u003e 0b e9 28 fc ff ff e8 b6 13 8a f9 48 8b 54 24 70 48 b8 00 00 00\nRSP: 0018:ffffc90002e4f520 EFLAGS: 00010212\nRAX: 0000000000000324 RBX: ffff88804d5fd500 RCX: ffffc90005b52000\nRDX: 0000000000040000 RSI: ffffffff87f05e3e RDI: 0000000000000003\nRBP: ffffc90002e4f650 R08: 0000000000000003 R09: 000000000000ffff\nR10: 000000000000ffff R11: 0000000000000000 R12: 000000000000ffff\nR13: 0000000000000000 R14: 000000000000ffcd R15: 000000000000001f\nFS: 00007f3babba9700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000020000080 CR3: 0000000075319000 CR4: 00000000003506e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\u003cTASK\u003e\ngeneve_xmit_skb drivers/net/geneve.c:927 [inline]\ngeneve_xmit+0xcf8/0x35d0 drivers/net/geneve.c:1107\n__netdev_start_xmit include/linux/netdevice.h:4805 [inline]\nnetdev_start_xmit include/linux/netdevice.h:4819 [inline]\n__dev_direct_xmit+0x500/0x730 net/core/dev.c:4309\ndev_direct_xmit include/linux/netdevice.h:3007 [inline]\npacket_direct_xmit+0x1b8/0x2c0 net/packet/af_packet.c:282\npacket_snd net/packet/af_packet.c:3073 [inline]\npacket_sendmsg+0x21f4/0x55d0 net/packet/af_packet.c:3104\nsock_sendmsg_nosec net/socket.c:714 [inline]\nsock_sendmsg+0xcf/0x120 net/socket.c:734\n____sys_sendmsg+0x6eb/0x810 net/socket.c:2489\n___sys_sendmsg+0xf3/0x170 net/socket.c:2543\n__sys_sendmsg net/socket.c:2572 [inline]\n__do_sys_sendmsg net/socket.c:2581 [inline]\n__se_sys_sendmsg net/socket.c:2579 [inline]\n__x64_sys_sendmsg+0x132/0x220 net/socket.c:2579\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f3baaa89109\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f3babba9168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e\nRAX: ffffffffffffffda RBX: 00007f3baab9bf60 RCX: 00007f3baaa89109\nRDX: 0000000000000000 RSI: 0000000020000a00 RDI: 0000000000000003\nRBP: 00007f3baaae305d R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007ffe74f2543f R14: 00007f3babba9300 R15: 0000000000022000\n\u003c/TASK\u003e","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"tunnels: do not assume mac header is set in skb_tunnel_check_pmtu()","id":"CVE-2022-49663","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"null_dereference","year":"2022"},"n_packages":0,"n_references":4,"next":{"headline":"tipc: move bc link creation back to tipc_node_create","id":"CVE-2022-49664"},"packages":[],"prev":{"headline":"ipv6: fix lockdep splat in in6_dump_addrs()","id":"CVE-2022-49662"},"products":["Linux"],"published":"2025-02-26","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"A null pointer dereference in the Linux kernel tunneling code can cause a system crash when processing specific network packets.","url":"https://insights.sbomify.com/CVE-2022-49663/"}