{"id":"CVE-2022-49691","summary":"erspan: do not assume transport header is always set","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nerspan: do not assume transport header is always set\n\nRewrite tests in ip6erspan_tunnel_xmit() and\nerspan_fb_xmit() to not assume transport header is set.\n\nsyzbot reported:\n\nWARNING: CPU: 0 PID: 1350 at include/linux/skbuff.h:2911 skb_transport_header include/linux/skbuff.h:2911 [inline]\nWARNING: CPU: 0 PID: 1350 at include/linux/skbuff.h:2911 ip6erspan_tunnel_xmit+0x15af/0x2eb0 net/ipv6/ip6_gre.c:963\nModules linked in:\nCPU: 0 PID: 1350 Comm: aoe_tx0 Not tainted 5.19.0-rc2-syzkaller-00160-g274295c6e53f #0\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014\nRIP: 0010:skb_transport_header include/linux/skbuff.h:2911 [inline]\nRIP: 0010:ip6erspan_tunnel_xmit+0x15af/0x2eb0 net/ipv6/ip6_gre.c:963\nCode: 0f 47 f0 40 88 b5 7f fe ff ff e8 8c 16 4b f9 89 de bf ff ff ff ff e8 a0 12 4b f9 66 83 fb ff 0f 85 1d f1 ff ff e8 71 16 4b f9 \u003c0f\u003e 0b e9 43 f0 ff ff e8 65 16 4b f9 48 8d 85 30 ff ff ff ba 60 00\nRSP: 0018:ffffc90005daf910 EFLAGS: 00010293\nRAX: 0000000000000000 RBX: 000000000000ffff RCX: 0000000000000000\nRDX: ffff88801f032100 RSI: ffffffff882e8d3f RDI: 0000000000000003\nRBP: ffffc90005dafab8 R08: 0000000000000003 R09: 000000000000ffff\nR10: 000000000000ffff R11: 0000000000000000 R12: ffff888024f21d40\nR13: 000000000000a288 R14: 00000000000000b0 R15: ffff888025a2e000\nFS: 0000000000000000(0000) GS:ffff88802c800000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000001b2e425000 CR3: 000000006d099000 CR4: 0000000000152ef0\nCall Trace:\n\u003cTASK\u003e\n__netdev_start_xmit include/linux/netdevice.h:4805 [inline]\nnetdev_start_xmit include/linux/netdevice.h:4819 [inline]\nxmit_one net/core/dev.c:3588 [inline]\ndev_hard_start_xmit+0x188/0x880 net/core/dev.c:3604\nsch_direct_xmit+0x19f/0xbe0 net/sched/sch_generic.c:342\n__dev_xmit_skb net/core/dev.c:3815 [inline]\n__dev_queue_xmit+0x14a1/0x3900 net/core/dev.c:4219\ndev_queue_xmit include/linux/netdevice.h:2994 [inline]\ntx+0x6a/0xc0 drivers/block/aoe/aoenet.c:63\nkthread+0x1e7/0x3b0 drivers/block/aoe/aoecmd.c:1229\nkthread+0x2e9/0x3a0 kernel/kthread.c:376\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302\n\u003c/TASK\u003e","modified":"2026-03-20T12:24:44.704760Z","published":"2025-02-26T02:24:15.146Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49691.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/02da602bc2f353dccd9e489a604490034ded941e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2c8aeffc7c586d53e1d380f010bdca4f710f2480"},{"type":"WEB","url":"https://git.kernel.org/stable/c/301bd140ed0b24f0da660874c7e8a47dad8c8222"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a3b2470399f679587c45abe56e551caf10becca2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cec9867ee55478ef5dcb2adf030fe0c442a4c4ee"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb401f37f6eadf24956d93687e5758c163c0d12b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49691.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49691"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d5db21a3e6977dcb42cee3d16cd69901fa66510a"},{"fixed":"fb401f37f6eadf24956d93687e5758c163c0d12b"},{"fixed":"02da602bc2f353dccd9e489a604490034ded941e"},{"fixed":"cec9867ee55478ef5dcb2adf030fe0c442a4c4ee"},{"fixed":"a3b2470399f679587c45abe56e551caf10becca2"},{"fixed":"2c8aeffc7c586d53e1d380f010bdca4f710f2480"},{"fixed":"301bd140ed0b24f0da660874c7e8a47dad8c8222"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49691.json"}}],"schema_version":"1.7.5"}