{"id":"CVE-2022-49066","url":"https://www.cyber-defence.io/tools/cve/CVE-2022-49066","generatedAt":"2026-10-27T19:39:54.380Z","title":"In the Linux kernel, the following vulnerability has been resolved: veth: Ensure eth header is in skb's linear part After feeding a decapsulated packet to a veth device with act_mirred, skb_headlen() may be 0.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nveth: Ensure eth header is in skb's linear part\n\nAfter feeding a decapsulated packet to a veth device with act_mirred,\nskb_headlen() may be 0. But veth_xmit() calls __dev_forward_skb(),\nwhich expects at least ETH_HLEN byte of linear data (as\n__dev_forward_skb2() calls eth_type_trans(), which pulls ETH_HLEN bytes\nunconditionally).\n\nUse pskb_may_pull() to ensure veth_xmit() respects this constraint.\n\nkernel BUG at include/linux/skbuff.h:2328!\nRIP: 0010:eth_type_trans+0xcf/0x140\nCall Trace:\n <IRQ>\n __dev_forward_skb2+0xe3/0x160\n veth_xmit+0x6e/0x250 [veth]\n dev_hard_start_xmit+0xc7/0x200\n __dev_queue_xmit+0x47f/0x520\n ? skb_ensure_writable+0x85/0xa0\n ? skb_mpls_pop+0x98/0x1c0\n tcf_mirred_act+0x442/0x47e [act_mirred]\n tcf_action_exec+0x86/0x140\n fl_classify+0x1d8/0x1e0 [cls_flower]\n ? dma_pte_clear_level+0x129/0x1a0\n ? dma_pte_clear_level+0x129/0x1a0\n ? prb_fill_curr_block+0x2f/0xc0\n ? skb_copy_bits+0x11a/0x220\n __tcf_classify+0x58/0x110\n tcf_classify_ingress+0x6b/0x140\n __netif_receive_skb_core.constprop.0+0x47d/0xfd0\n ? __iommu_dma_unmap_swiotlb+0x44/0x90\n __netif_receive_skb_one_core+0x3d/0xa0\n netif_receive_skb+0x116/0x170\n be_process_rx+0x22f/0x330 [be2net]\n be_poll+0x13c/0x370 [be2net]\n __napi_poll+0x2a/0x170\n net_rx_action+0x22f/0x2f0\n __do_softirq+0xca/0x2a8\n __irq_exit_rcu+0xc1/0xe0\n common_interrupt+0x83/0xa0","published":"2025-02-26T07:00:44.000Z","lastModified":"2026-06-17T05:16:59.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":[],"affected":["linux/linux kernel"],"epss":{"score":0.00269,"percentile":0.18962,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/1ef0088e43af1de4e3b365218c4d3179d9a37eec","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2fd90b86dff413fbf8128780c04ea9c6849c16e2","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3de2a02b60a4ef0ab76263216f08c7d095fc7c42","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/46bc359fec0c6d87b70d7a008bcd9a5e30dd6f27","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/726e2c5929de841fdcef4e2bf995680688ae1b87","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/93940fc4cb81840dc0fa202de48cccb949a0261d","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d417a859221f127e8edf09c14b76ab50f825e171","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d67c900f1947d64ba8a64f693504bcaab8d9000c","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-49066","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}