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CVE-2022-49691— erspan: do not assume transport header is always set

Quick assessment

Affected

Linux Linux

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于错误假定传输头始终已设置，当实际未设置时会引发 skbuff.h 中的警告。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.28% · P20 Updated May 13, 2026

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service

Affected Version Matrix 14

Vendor	Product	Version Range	Status
Linux	Linux	`d5db21a3e6977dcb42cee3d16cd69901fa66510a< fb401f37f6eadf24956d93687e5758c163c0d12b`	affected
		`d5db21a3e6977dcb42cee3d16cd69901fa66510a< 02da602bc2f353dccd9e489a604490034ded941e`	affected
		`d5db21a3e6977dcb42cee3d16cd69901fa66510a< cec9867ee55478ef5dcb2adf030fe0c442a4c4ee`	affected
		`d5db21a3e6977dcb42cee3d16cd69901fa66510a< a3b2470399f679587c45abe56e551caf10becca2`	affected
		`d5db21a3e6977dcb42cee3d16cd69901fa66510a< 2c8aeffc7c586d53e1d380f010bdca4f710f2480`	affected
		`d5db21a3e6977dcb42cee3d16cd69901fa66510a< 301bd140ed0b24f0da660874c7e8a47dad8c8222`	affected
		`4.18`	affected
		`< 4.18`	unaffected
… +6 more rows

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I. Basic Information for CVE-2022-49691

Vulnerability Information

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Vulnerability Title

erspan: do not assume transport header is always set

Source: CVE Program / CVE List V5

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: erspan: do not assume transport header is always set Rewrite tests in ip6erspan_tunnel_xmit() and erspan_fb_xmit() to not assume transport header is set. syzbot reported: WARNING: CPU: 0 PID: 1350 at include/linux/skbuff.h:2911 skb_transport_header include/linux/skbuff.h:2911 [inline] WARNING: CPU: 0 PID: 1350 at include/linux/skbuff.h:2911 ip6erspan_tunnel_xmit+0x15af/0x2eb0 net/ipv6/ip6_gre.c:963 Modules linked in: CPU: 0 PID: 1350 Comm: aoe_tx0 Not tainted 5.19.0-rc2-syzkaller-00160-g274295c6e53f #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:skb_transport_header include/linux/skbuff.h:2911 [inline] RIP: 0010:ip6erspan_tunnel_xmit+0x15af/0x2eb0 net/ipv6/ip6_gre.c:963 Code: 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 <0f> 0b e9 43 f0 ff ff e8 65 16 4b f9 48 8d 85 30 ff ff ff ba 60 00 RSP: 0018:ffffc90005daf910 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 000000000000ffff RCX: 0000000000000000 RDX: ffff88801f032100 RSI: ffffffff882e8d3f RDI: 0000000000000003 RBP: ffffc90005dafab8 R08: 0000000000000003 R09: 000000000000ffff R10: 000000000000ffff R11: 0000000000000000 R12: ffff888024f21d40 R13: 000000000000a288 R14: 00000000000000b0 R15: ffff888025a2e000 FS: 0000000000000000(0000) GS:ffff88802c800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e425000 CR3: 000000006d099000 CR4: 0000000000152ef0 Call Trace: <TASK> __netdev_start_xmit include/linux/netdevice.h:4805 [inline] netdev_start_xmit include/linux/netdevice.h:4819 [inline] xmit_one net/core/dev.c:3588 [inline] dev_hard_start_xmit+0x188/0x880 net/core/dev.c:3604 sch_direct_xmit+0x19f/0xbe0 net/sched/sch_generic.c:342 __dev_xmit_skb net/core/dev.c:3815 [inline] __dev_queue_xmit+0x14a1/0x3900 net/core/dev.c:4219 dev_queue_xmit include/linux/netdevice.h:2994 [inline] tx+0x6a/0xc0 drivers/block/aoe/aoenet.c:63 kthread+0x1e7/0x3b0 drivers/block/aoe/aoecmd.c:1229 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 </TASK>

Source: CVE Program / CVE List V5

CVSS Information

N/A

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Vulnerability Title

Linux kernel 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Linux	Linux	d5db21a3e6977dcb42cee3d16cd69901fa66510a ~ fb401f37f6eadf24956d93687e5758c163c0d12b	-
Linux	Linux	4.18	-

II. Public POCs for CVE-2022-49691

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2022-49691

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Patches & Fixes for CVE-2022-49691 (6)

https://www.cve.org/CVERecord?id=CVE-2022-49691

Same Patch Batch · Linux · 2025-02-26 · 706 CVEs total

CVE-2022-49149	9.8 CRITICAL	rxrpc: Fix call timer start racing with call destruction
CVE-2022-49561	9.8 CRITICAL	netfilter: conntrack: re-fetch conntrack after insertion
CVE-2022-49362	9.8 CRITICAL	NFSD: Fix potential use-after-free in nfsd_file_put()
CVE-2022-49201	9.8 CRITICAL	ibmvnic: fix race between xmit and reset
CVE-2022-49194	9.8 CRITICAL	net: bcmgenet: Use stronger register read/writes to assure ordering
CVE-2022-49093	9.8 CRITICAL	skbuff: fix coalescing for page_pool fragment recycling
CVE-2022-49260	9.8 CRITICAL	crypto: hisilicon/sec - fix the aead software fallback for engine
CVE-2022-49418	9.8 CRITICAL	NFSv4: Fix free of uninitialized nfs4_label on referral lookup.
CVE-2022-49094	9.8 CRITICAL	net/tls: fix slab-out-of-bounds bug in decrypt_internal
CVE-2022-49407	9.8 CRITICAL	dlm: fix plock invalid read
CVE-2022-49280	9.8 CRITICAL	NFSD: prevent underflow in nfssvc_decode_writeargs()
CVE-2022-49356	9.8 CRITICAL	SUNRPC: Trap RDMA segment overflows
CVE-2022-49058	9.1 CRITICAL	cifs: potential buffer overflow in handling symlinks
CVE-2022-49500	8.8 HIGH	wl1251: dynamically allocate memory used for DMA
CVE-2022-49535	8.8 HIGH	scsi: lpfc: Fix null pointer dereference after failing to issue FLOGI and PLOGI
CVE-2022-49114	8.8 HIGH	scsi: libfc: Fix use after free in fc_exch_abts_resp()
CVE-2022-49470	8.8 HIGH	Bluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event
CVE-2022-49111	8.8 HIGH	Bluetooth: Fix use after free in hci_send_acl
CVE-2022-49238	8.8 HIGH	ath11k: free peer for station when disconnect from AP for QCA6390/WCN6855
CVE-2022-49519	8.8 HIGH	ath10k: skip ath10k_halt during suspend for driver state RESTARTING

Showing top 20 of 706 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux

Same vendor: Linux

V. Comments for CVE-2022-49691

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CVE-2022-49691— erspan: do not assume transport header is always set

Quick assessment

Possible ATT&CK Techniques 1 AI

Affected Version Matrix 14

I. Basic Information for CVE-2022-49691

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2022-49691

III. Intelligence Information for CVE-2022-49691

Patches & Fixes for CVE-2022-49691 (6)

Same Patch Batch · Linux · 2025-02-26 · 706 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2022-49691

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