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CVE-2022-48937— io_uring: add a schedule point in io_add_buffers()

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，该漏洞源于在io_add_buffers函数中缺少调度点。

AI Predicted 5.5 Difficulty: Easy EPSS 0.16% · P5 Updated May 13, 2026

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 10

Vendor	Product	Version Range	Status
Linux	Linux	`ddf0322db79c5984dc1a1db890f946dd19b7d6d9< 4a93c6594613c3429b6f30136fff115c7f803af4`	affected
		`ddf0322db79c5984dc1a1db890f946dd19b7d6d9< c718ea4e7382e18957ed0e88a5f855e2122d9c00`	affected
		`ddf0322db79c5984dc1a1db890f946dd19b7d6d9< 8f3cc3c5bc43d03b5748ac4fb8d180084952c36a`	affected
		`ddf0322db79c5984dc1a1db890f946dd19b7d6d9< f240762f88b4b1b58561939ffd44837759756477`	affected
		`5.7`	affected
		`< 5.7`	unaffected
		`5.10.103≤ 5.10.*`	unaffected
		`5.15.26≤ 5.15.*`	unaffected
… +2 more rows

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I. Basic Information for CVE-2022-48937

Vulnerability Information

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Vulnerability Title

io_uring: add a schedule point in io_add_buffers()

Source: CVE Program / CVE List V5

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: io_uring: add a schedule point in io_add_buffers() Looping ~65535 times doing kmalloc() calls can trigger soft lockups, especially with DEBUG features (like KASAN). [ 253.536212] watchdog: BUG: soft lockup - CPU#64 stuck for 26s! [b219417889:12575] [ 253.544433] Modules linked in: vfat fat i2c_mux_pca954x i2c_mux spidev cdc_acm xhci_pci xhci_hcd sha3_generic gq(O) [ 253.544451] CPU: 64 PID: 12575 Comm: b219417889 Tainted: G S O 5.17.0-smp-DEV #801 [ 253.544457] RIP: 0010:kernel_text_address (./include/asm-generic/sections.h:192 ./include/linux/kallsyms.h:29 kernel/extable.c:67 kernel/extable.c:98) [ 253.544464] Code: 0f 93 c0 48 c7 c1 e0 63 d7 a4 48 39 cb 0f 92 c1 20 c1 0f b6 c1 5b 5d c3 90 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 53 48 89 fb <48> c7 c0 00 00 80 a0 41 be 01 00 00 00 48 39 c7 72 0c 48 c7 c0 40 [ 253.544468] RSP: 0018:ffff8882d8baf4c0 EFLAGS: 00000246 [ 253.544471] RAX: 1ffff1105b175e00 RBX: ffffffffa13ef09a RCX: 00000000a13ef001 [ 253.544474] RDX: ffffffffa13ef09a RSI: ffff8882d8baf558 RDI: ffffffffa13ef09a [ 253.544476] RBP: ffff8882d8baf4d8 R08: ffff8882d8baf5e0 R09: 0000000000000004 [ 253.544479] R10: ffff8882d8baf5e8 R11: ffffffffa0d59a50 R12: ffff8882eab20380 [ 253.544481] R13: ffffffffa0d59a50 R14: dffffc0000000000 R15: 1ffff1105b175eb0 [ 253.544483] FS: 00000000016d3380(0000) GS:ffff88af48c00000(0000) knlGS:0000000000000000 [ 253.544486] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 253.544488] CR2: 00000000004af0f0 CR3: 00000002eabfa004 CR4: 00000000003706e0 [ 253.544491] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 253.544492] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 253.544494] Call Trace: [ 253.544496] <TASK> [ 253.544498] ? io_queue_sqe (fs/io_uring.c:7143) [ 253.544505] __kernel_text_address (kernel/extable.c:78) [ 253.544508] unwind_get_return_address (arch/x86/kernel/unwind_frame.c:19) [ 253.544514] arch_stack_walk (arch/x86/kernel/stacktrace.c:27) [ 253.544517] ? io_queue_sqe (fs/io_uring.c:7143) [ 253.544521] stack_trace_save (kernel/stacktrace.c:123) [ 253.544527] ____kasan_kmalloc (mm/kasan/common.c:39 mm/kasan/common.c:45 mm/kasan/common.c:436 mm/kasan/common.c:515) [ 253.544531] ? ____kasan_kmalloc (mm/kasan/common.c:39 mm/kasan/common.c:45 mm/kasan/common.c:436 mm/kasan/common.c:515) [ 253.544533] ? __kasan_kmalloc (mm/kasan/common.c:524) [ 253.544535] ? kmem_cache_alloc_trace (./include/linux/kasan.h:270 mm/slab.c:3567) [ 253.544541] ? io_issue_sqe (fs/io_uring.c:4556 fs/io_uring.c:4589 fs/io_uring.c:6828) [ 253.544544] ? __io_queue_sqe (fs/io_uring.c:?) [ 253.544551] __kasan_kmalloc (mm/kasan/common.c:524) [ 253.544553] kmem_cache_alloc_trace (./include/linux/kasan.h:270 mm/slab.c:3567) [ 253.544556] ? io_issue_sqe (fs/io_uring.c:4556 fs/io_uring.c:4589 fs/io_uring.c:6828) [ 253.544560] io_issue_sqe (fs/io_uring.c:4556 fs/io_uring.c:4589 fs/io_uring.c:6828) [ 253.544564] ? __kasan_slab_alloc (mm/kasan/common.c:45 mm/kasan/common.c:436 mm/kasan/common.c:469) [ 253.544567] ? __kasan_slab_alloc (mm/kasan/common.c:39 mm/kasan/common.c:45 mm/kasan/common.c:436 mm/kasan/common.c:469) [ 253.544569] ? kmem_cache_alloc_bulk (mm/slab.h:732 mm/slab.c:3546) [ 253.544573] ? __io_alloc_req_refill (fs/io_uring.c:2078) [ 253.544578] ? io_submit_sqes (fs/io_uring.c:7441) [ 253.544581] ? __se_sys_io_uring_enter (fs/io_uring.c:10154 fs/io_uring.c:10096) [ 253.544584] ? __x64_sys_io_uring_enter (fs/io_uring.c:10096) [ 253.544587] ? do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80) [ 253.544590] ? entry_SYSCALL_64_after_hwframe (??:?) [ 253.544596] __io_queue_sqe (fs/io_uring.c:?) [ 253.544600] io_queue_sqe (fs/io_uring.c:7143) [ 253.544603] io_submit_sqe (fs/io_uring.c:?) [ 253.544608] io_submit_sqes (fs/io_uring.c:?) [ 253.544612] __se_sys_io_uring_enter (fs/io_uring.c:10154 fs/io_uri ---truncated---

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

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，该漏洞源于在io_add_buffers函数中缺少调度点。

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	ddf0322db79c5984dc1a1db890f946dd19b7d6d9 ~ 4a93c6594613c3429b6f30136fff115c7f803af4	-
Linux	Linux	5.7	-

II. Public POCs for CVE-2022-48937

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2022-48937

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Other References for CVE-2022-48937 (4)

https://www.cve.org/CVERecord?id=CVE-2022-48937

Same Patch Batch · Linux · 2024-08-22 · 42 CVEs total

CVE-2022-48941	8.8 HIGH	ice: fix concurrent reset and removal of VFs
CVE-2022-48919	8.8 HIGH	cifs: fix double free race when mount fails in cifs_get_root()
CVE-2022-48923	7.8 HIGH	btrfs: prevent copying too big compressed lzo segment
CVE-2022-48925	7.8 HIGH	RDMA/cma: Do not change route.addr.src_addr outside state checks
CVE-2022-48927	7.8 HIGH	iio: adc: tsc2046: fix memory corruption by preventing array overflow
CVE-2022-48913	7.8 HIGH	blktrace: fix use after free for struct blk_trace
CVE-2022-48912	7.8 HIGH	netfilter: fix use-after-free in __nf_register_net_hook()
CVE-2022-48911	7.8 HIGH	netfilter: nf_queue: fix possible use-after-free
CVE-2022-48932	7.8 HIGH	net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte
CVE-2022-48935	7.8 HIGH	netfilter: nf_tables: unregister flowtable hooks on netns exit
CVE-2022-48940	7.8 HIGH	bpf: Fix crash due to incorrect copy_map_value
CVE-2022-48943	7.1 HIGH	KVM: x86/mmu: make apf token non-zero to fix bug
CVE-2022-48931		configfs: fix a race in configfs_{,un}register_subsystem()
CVE-2022-48930		RDMA/ib_srp: Fix a deadlock
CVE-2022-48933		netfilter: nf_tables: fix memory leak during stateful obj update
CVE-2022-48934		nfp: flower: Fix a potential leak in nfp_tunnel_add_shared_mac()
CVE-2022-48929		bpf: Fix crash due to out of bounds access into reg2btf_ids.
CVE-2022-48928		iio: adc: men_z188_adc: Fix a resource leak in an error handling path
CVE-2022-48938		CDC-NCM: avoid overflow in sanity checking
CVE-2022-48926		usb: gadget: rndis: add spinlock for rndis response list

Showing top 20 of 42 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux

Same vendor: Linux

V. Comments for CVE-2022-48937

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

CVE-2022-48937— io_uring: add a schedule point in io_add_buffers()

Quick assessment

Possible ATT&CK Techniques 1 AI

Affected Version Matrix 10

I. Basic Information for CVE-2022-48937

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-2022-48937

III. Intelligence Information for CVE-2022-48937

Other References for CVE-2022-48937 (4)

Same Patch Batch · Linux · 2024-08-22 · 42 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2022-48937

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