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CVE-2026-68291— idpf: fix max_vport related crash on allocation error during init

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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于在初始化时分配vports、netdevs和vport_config缓冲区失败后过早设置adapter->max_vports，可能导致空指针取消引用和内核崩溃。

AI Predicted 4.7 Difficulty: Trivial EPSS 0.15% · P5 Updated Aug 17, 2026

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 6

Vendor	Product	Version Range	Status
Linux	Linux	`0fe45467a1041ea3657a7fa3a791c84c104fbd34< 9fbe22b7aff0a65984d78ee6b93e2f8179abd1f5`	affected
		`0fe45467a1041ea3657a7fa3a791c84c104fbd34< 237f1f7653b8729169af11fae79f01b90d00b87e`	affected
		`6.7`	affected
		`< 6.7`	unaffected
		`7.1.6≤ 7.1.*`	unaffected
		`7.2≤ *`	unaffected

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I. Basic Information for CVE-2026-68291

Vulnerability Information

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Vulnerability Title

idpf: fix max_vport related crash on allocation error during init

Source: CVE Program / CVE List V5

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: idpf: fix max_vport related crash on allocation error during init Set adapter->max_vports only after successful allocation of vports, netdevs and vport_config buffers. This fixes possible crashes on reset or rmmod, following failed allocation on init [ 305.981402] idpf 0000:83:00.0: enabling device (0100 -> 0102) [ 305.994464] idpf 0000:83:00.0: Device HW Reset initiated [ 320.416872] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 320.416918] #PF: supervisor read access in kernel mode [ 320.416942] #PF: error_code(0x0000) - not-present page [ 320.416963] PGD 2099657067 P4D 0 [ 320.416983] Oops: Oops: 0000 [#1] SMP NOPTI ... [ 320.417093] RIP: 0010:idpf_remove+0x118/0x200 [idpf] [ 320.417130] Code: 8b bb 98 09 00 00 e8 17 0f 5b e5 48 8b bb e8 08 00 00 e8 0b 0f 5b e5 66 83 bb 28 06 00 00 00 48 8b bb 20 06 00 00 74 49 31 ed <48> 8b 04 ef 48 85 c0 74 2f 48 8b 78 20 e8 66 58 91 e5 48 8b 83 20 [ 320.417183] RSP: 0018:ff7322212903fdb8 EFLAGS: 00010246 [ 320.417205] RAX: 0000000000000000 RBX: ff4463de40300000 RCX: ff7322212903fd4c [ 320.417228] RDX: 0000000000000001 RSI: ffffffffa7f7d100 RDI: 0000000000000000 [ 320.417250] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 320.417272] R10: 0000000000000001 R11: ff4463de3a638f58 R12: ff4463be89ac7000 [ 320.417294] R13: ff4463be89ac7198 R14: ff4463be94fc7198 R15: ffffffffc0f10f20 [ 320.417317] FS: 00007f963c0e6740(0000) GS:ff4463fdd65d8000(0000) knlGS:0000000000000000 [ 320.417342] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 320.417362] CR2: 0000000000000000 CR3: 00000020ba674002 CR4: 0000000000773ef0 [ 320.417385] PKRU: 55555554 [ 320.417398] Call Trace: [ 320.417412] <TASK> [ 320.417429] pci_device_remove+0x42/0xb0 [ 320.417459] device_release_driver_internal+0x1a9/0x210 [ 320.417492] driver_detach+0x4b/0x90 [ 320.417516] bus_remove_driver+0x70/0x100 [ 320.417539] pci_unregister_driver+0x2e/0xb0 [ 320.417564] __do_sys_delete_module.constprop.0+0x190/0x2f0 [ 320.417592] ? kmem_cache_free+0x31e/0x550 [ 320.417619] ? lockdep_hardirqs_on_prepare+0xde/0x190 [ 320.417644] ? do_syscall_64+0x38/0x6b0 [ 320.417665] do_syscall_64+0xc8/0x6b0 [ 320.417683] ? clear_bhb_loop+0x30/0x80 [ 320.417706] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 320.417727] RIP: 0033:0x7f963bb30beb

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	0fe45467a1041ea3657a7fa3a791c84c104fbd34 ~ 9fbe22b7aff0a65984d78ee6b93e2f8179abd1f5	-
Linux	Linux	6.7	-

II. Public POCs for CVE-2026-68291

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-68291

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Patches & Fixes for CVE-2026-68291 (2)

https://www.cve.org/CVERecord?id=CVE-2026-68291

Same Patch Batch · Linux · 2026-08-10 · 344 CVEs total

CVE-2026-68161	9.8 CRITICAL	sctp: close UDP tunnel sockets during netns teardown
CVE-2026-68123	9.8 CRITICAL	openvswitch: fix GSO userspace truncation underflow
CVE-2026-68127	9.8 CRITICAL	ila: reload IPv6 header after pskb_may_pull in checksum adjust
CVE-2026-68117	9.8 CRITICAL	tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-68136	9.8 CRITICAL	net: gro: fix double aggregation of flush-marked skbs
CVE-2026-68137	9.8 CRITICAL	net/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-68300	9.8 CRITICAL	sctp: auth: verify auth requirement when auth_chunk is NULL
CVE-2026-68144	9.8 CRITICAL	phonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-68154	9.8 CRITICAL	libceph: reject zero bucket types in crush_decode
CVE-2026-68156	9.8 CRITICAL	libceph: refresh auth->authorizer_buf{,_len} after authorizer update
CVE-2026-68158	9.8 CRITICAL	libceph: Fix multiplication overflow in decode_new_up_state_weight()
CVE-2026-68159	9.8 CRITICAL	libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
CVE-2026-68160	9.8 CRITICAL	ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-68302	9.8 CRITICAL	amt: re-read skb header pointers after every pull
CVE-2026-68170	9.8 CRITICAL	mptcp: fix stale skb->sk reference on subflow close
CVE-2026-68426	9.8 CRITICAL	xfrm: fix stale skb->prev after async crypto steals a GSO segment
CVE-2026-68388	9.8 CRITICAL	smb/client: handle overlapping allocated ranges in fallocate
CVE-2026-68385	9.8 CRITICAL	s390/checksum: Fix csum_partial() without vector facility
CVE-2026-68381	9.8 CRITICAL	ksmbd: pin conn during async oplock break notification
CVE-2026-68124	9.6 CRITICAL	mctp: serial: handle zero-length frames to prevent rx buffer overflow

Showing top 20 of 344 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux

Same vendor: Linux

V. Comments for CVE-2026-68291

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-68291— idpf: fix max_vport related crash on allocation error during init

Quick assessment

Possible ATT&CK Techniques 1 AI

Affected Version Matrix 6

I. Basic Information for CVE-2026-68291

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-2026-68291

III. Intelligence Information for CVE-2026-68291

Patches & Fixes for CVE-2026-68291 (2)

Same Patch Batch · Linux · 2026-08-10 · 344 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-68291

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