CVE-2022-49066

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Source
https://cve.org/CVERecord?id=CVE-2022-49066
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49066.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49066
Downstream
Related
Published
2025-02-26T01:54:34.395Z
Modified
2026-03-20T12:22:08.084974Z
Summary
veth: Ensure eth header is in skb's linear part
Details

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 actmirred, skbheadlen() may be 0. But veth_xmit() calls __devforwardskb(), which expects at least ETH_HLEN byte of linear data (as _devforwardskb2() calls ethtypetrans(), which pulls ETHHLEN bytes unconditionally).

Use pskbmaypull() to ensure veth_xmit() respects this constraint.

kernel BUG at include/linux/skbuff.h:2328! RIP: 0010:ethtypetrans+0xcf/0x140 Call Trace: <IRQ> __devforwardskb2+0xe3/0x160 vethxmit+0x6e/0x250 [veth] devhardstartxmit+0xc7/0x200 __devqueuexmit+0x47f/0x520 ? skbensurewritable+0x85/0xa0 ? skbmplspop+0x98/0x1c0 tcfmirredact+0x442/0x47e [actmirred] tcfactionexec+0x86/0x140 flclassify+0x1d8/0x1e0 [clsflower] ? dmapteclearlevel+0x129/0x1a0 ? dmapteclearlevel+0x129/0x1a0 ? prbfillcurrblock+0x2f/0xc0 ? skbcopybits+0x11a/0x220 __tcfclassify+0x58/0x110 tcfclassify_ingress+0x6b/0x140 __netifreceiveskb_core.constprop.0+0x47d/0xfd0 ? __iommudmaunmap_swiotlb+0x44/0x90 __netifreceiveskb_onecore+0x3d/0xa0 netifreceiveskb+0x116/0x170 beprocessrx+0x22f/0x330 [be2net] bepoll+0x13c/0x370 [be2net] __napipoll+0x2a/0x170 netrx_action+0x22f/0x2f0 __do_softirq+0xca/0x2a8 _irqexitrcu+0xc1/0xe0 commoninterrupt+0x83/0xa0

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49066.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / 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
e314dbdc1c0dc6a548ecf0afce28ecfd538ff568
Fixed
3de2a02b60a4ef0ab76263216f08c7d095fc7c42
Fixed
d417a859221f127e8edf09c14b76ab50f825e171
Fixed
1ef0088e43af1de4e3b365218c4d3179d9a37eec
Fixed
2fd90b86dff413fbf8128780c04ea9c6849c16e2
Fixed
d67c900f1947d64ba8a64f693504bcaab8d9000c
Fixed
93940fc4cb81840dc0fa202de48cccb949a0261d
Fixed
46bc359fec0c6d87b70d7a008bcd9a5e30dd6f27
Fixed
726e2c5929de841fdcef4e2bf995680688ae1b87

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49066.json"