CVE-2022-49066

veth: Ensure eth header is in skb's linear part

MEDIUM

5.5

CVSS Score

Published: February 26, 2025 at 01:54 AM UTC

Updated: June 17, 2026 at 05:16 AM UTC

1 product affected across 1 vendorLinux Kernel

Using Linux by Linux?

Get instant alerts when new vulnerabilities affect Linux - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM5.5

Exploit prediction

EPSS 0.3%

Description

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. But veth_xmit() calls __dev_forward_skb(), which expects at least ETH_HLEN byte of linear data (as __dev_forward_skb2() calls eth_type_trans(), which pulls ETH_HLEN bytes unconditionally). Use pskb_may_pull() to ensure veth_xmit() respects this constraint. kernel BUG at include/linux/skbuff.h:2328! RIP: 0010:eth_type_trans+0xcf/0x140 Call Trace: <IRQ> __dev_forward_skb2+0xe3/0x160 veth_xmit+0x6e/0x250 [veth] dev_hard_start_xmit+0xc7/0x200 __dev_queue_xmit+0x47f/0x520 ? skb_ensure_writable+0x85/0xa0 ? skb_mpls_pop+0x98/0x1c0 tcf_mirred_act+0x442/0x47e [act_mirred] tcf_action_exec+0x86/0x140 fl_classify+0x1d8/0x1e0 [cls_flower] ? dma_pte_clear_level+0x129/0x1a0 ? dma_pte_clear_level+0x129/0x1a0 ? prb_fill_curr_block+0x2f/0xc0 ? skb_copy_bits+0x11a/0x220 __tcf_classify+0x58/0x110 tcf_classify_ingress+0x6b/0x140 __netif_receive_skb_core.constprop.0+0x47d/0xfd0 ? __iommu_dma_unmap_swiotlb+0x44/0x90 __netif_receive_skb_one_core+0x3d/0xa0 netif_receive_skb+0x116/0x170 be_process_rx+0x22f/0x330 [be2net] be_poll+0x13c/0x370 [be2net] __napi_poll+0x2a/0x170 net_rx_action+0x22f/0x2f0 __do_softirq+0xca/0x2a8 __irq_exit_rcu+0xc1/0xe0 common_interrupt+0x83/0xa0

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

2.6.24 ≤ v < 4.14.2762.6.24 ≤ v < 4.19.2392.6.24 ≤ v < 4.9.3112.6.24 ≤ v < 5.10.1122.6.24 ≤ v < 5.15.352.6.24 ≤ v < 5.17.42.6.24 ≤ v < 5.182.6.24 ≤ v < 5.4.1904.10 ≤ v < 4.14.2764.15 ≤ v < 4.19.2394.20 ≤ v < 5.4.1905.11 ≤ v < 5.15.355.16 ≤ v < 5.17.45.5 ≤ v < 5.10.1122.6.24 5.18 rc1 5.18 rc2e314dbdc1c0dc6a548ecf0afce28ecfd538ff568

Vendor states this is fixed in 1ef0088e43af1de4e3b365218c4d3179d9a37eec (fixed)

Vendor states this is fixed in 2fd90b86dff413fbf8128780c04ea9c6849c16e2 (fixed)

Vendor states this is fixed in 3de2a02b60a4ef0ab76263216f08c7d095fc7c42 (fixed)

Vendor states this is fixed in 46bc359fec0c6d87b70d7a008bcd9a5e30dd6f27 (fixed)

Vendor states this is fixed in 726e2c5929de841fdcef4e2bf995680688ae1b87 (fixed)

Vendor states this is fixed in 93940fc4cb81840dc0fa202de48cccb949a0261d (fixed)

Vendor states this is fixed in d417a859221f127e8edf09c14b76ab50f825e171 (fixed)

Vendor states this is fixed in d67c900f1947d64ba8a64f693504bcaab8d9000c (fixed)

Vendor states this is fixed in 2.6.24 (unaffected)

Vendor states this is fixed in 4.14.276 (unaffected)

Vendor states this is fixed in 4.19.239 (unaffected)

Vendor states this is fixed in 4.9.311 (unaffected)