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CVE-2022-49945— hwmon: (gpio-fan) Fix array out of bounds access

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gpio-fan未检查冷却状态边界，可能导致数组越界访问。

AI Predicted 5.5 Difficulty: Easy EPSS 0.24% · P14 Updated May 13, 2026

Possible ATT&CK Techniques 2 AI

T1068 · Exploitation for Privilege Escalation T1203 · Exploitation for Client Execution

Affected Version Matrix 18

Vendor	Product	Version Range	Status
Linux	Linux	`b5cf88e46badea6d600d8515edea23814e03444d< e9f6972ab40a82bd7f6d36800792ba2e084474d8`	affected
		`b5cf88e46badea6d600d8515edea23814e03444d< 3ff866455e1e263a9ac1958095fd440984248e2f`	affected
		`b5cf88e46badea6d600d8515edea23814e03444d< c8ae6a18708f260ccdeef6ba53af7548457dc26c`	affected
		`b5cf88e46badea6d600d8515edea23814e03444d< 7756eb1ed124753f4d64f761fc3d84290dffcb4d`	affected
		`b5cf88e46badea6d600d8515edea23814e03444d< 517dba798793e69b510779c3cde7224a65f3ed1d`	affected
		`b5cf88e46badea6d600d8515edea23814e03444d< 53196e0376205ed49b75bfd0475af5e0fbd20156`	affected
		`b5cf88e46badea6d600d8515edea23814e03444d< 3263984c7acdcb0658155b05a724ed45a10de76d`	affected
		`b5cf88e46badea6d600d8515edea23814e03444d< f233d2be38dbbb22299192292983037f01ab363c`	affected
… +10 more rows

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I. Basic Information for CVE-2022-49945

Vulnerability Information

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Vulnerability Title

hwmon: (gpio-fan) Fix array out of bounds access

Source: CVE Program / CVE List V5

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (gpio-fan) Fix array out of bounds access The driver does not check if the cooling state passed to gpio_fan_set_cur_state() exceeds the maximum cooling state as stored in fan_data->num_speeds. Since the cooling state is later used as an array index in set_fan_speed(), an array out of bounds access can occur. This can be exploited by setting the state of the thermal cooling device to arbitrary values, causing for example a kernel oops when unavailable memory is accessed this way. Example kernel oops: [ 807.987276] Unable to handle kernel paging request at virtual address ffffff80d0588064 [ 807.987369] Mem abort info: [ 807.987398] ESR = 0x96000005 [ 807.987428] EC = 0x25: DABT (current EL), IL = 32 bits [ 807.987477] SET = 0, FnV = 0 [ 807.987507] EA = 0, S1PTW = 0 [ 807.987536] FSC = 0x05: level 1 translation fault [ 807.987570] Data abort info: [ 807.987763] ISV = 0, ISS = 0x00000005 [ 807.987801] CM = 0, WnR = 0 [ 807.987832] swapper pgtable: 4k pages, 39-bit VAs, pgdp=0000000001165000 [ 807.987872] [ffffff80d0588064] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000 [ 807.987961] Internal error: Oops: 96000005 [#1] PREEMPT SMP [ 807.987992] Modules linked in: cmac algif_hash aes_arm64 algif_skcipher af_alg bnep hci_uart btbcm bluetooth ecdh_generic ecc 8021q garp stp llc snd_soc_hdmi_codec brcmfmac vc4 brcmutil cec drm_kms_helper snd_soc_core cfg80211 snd_compress bcm2835_codec(C) snd_pcm_dmaengine syscopyarea bcm2835_isp(C) bcm2835_v4l2(C) sysfillrect v4l2_mem2mem bcm2835_mmal_vchiq(C) raspberrypi_hwmon sysimgblt videobuf2_dma_contig videobuf2_vmalloc fb_sys_fops videobuf2_memops rfkill videobuf2_v4l2 videobuf2_common i2c_bcm2835 snd_bcm2835(C) videodev snd_pcm snd_timer snd mc vc_sm_cma(C) gpio_fan uio_pdrv_genirq uio drm fuse drm_panel_orientation_quirks backlight ip_tables x_tables ipv6 [ 807.988508] CPU: 0 PID: 1321 Comm: bash Tainted: G C 5.15.56-v8+ #1575 [ 807.988548] Hardware name: Raspberry Pi 3 Model B Rev 1.2 (DT) [ 807.988574] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 807.988608] pc : set_fan_speed.part.5+0x34/0x80 [gpio_fan] [ 807.988654] lr : gpio_fan_set_cur_state+0x34/0x50 [gpio_fan] [ 807.988691] sp : ffffffc008cf3bd0 [ 807.988710] x29: ffffffc008cf3bd0 x28: ffffff80019edac0 x27: 0000000000000000 [ 807.988762] x26: 0000000000000000 x25: 0000000000000000 x24: ffffff800747c920 [ 807.988787] x23: 000000000000000a x22: ffffff800369f000 x21: 000000001999997c [ 807.988854] x20: ffffff800369f2e8 x19: ffffff8002ae8080 x18: 0000000000000000 [ 807.988877] x17: 0000000000000000 x16: 0000000000000000 x15: 000000559e271b70 [ 807.988938] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 [ 807.988960] x11: 0000000000000000 x10: ffffffc008cf3c20 x9 : ffffffcfb60c741c [ 807.989018] x8 : 000000000000000a x7 : 00000000ffffffc9 x6 : 0000000000000009 [ 807.989040] x5 : 000000000000002a x4 : 0000000000000000 x3 : ffffff800369f2e8 [ 807.989062] x2 : 000000000000e780 x1 : 0000000000000001 x0 : ffffff80d0588060 [ 807.989084] Call trace: [ 807.989091] set_fan_speed.part.5+0x34/0x80 [gpio_fan] [ 807.989113] gpio_fan_set_cur_state+0x34/0x50 [gpio_fan] [ 807.989199] cur_state_store+0x84/0xd0 [ 807.989221] dev_attr_store+0x20/0x38 [ 807.989262] sysfs_kf_write+0x4c/0x60 [ 807.989282] kernfs_fop_write_iter+0x130/0x1c0 [ 807.989298] new_sync_write+0x10c/0x190 [ 807.989315] vfs_write+0x254/0x378 [ 807.989362] ksys_write+0x70/0xf8 [ 807.989379] __arm64_sys_write+0x24/0x30 [ 807.989424] invoke_syscall+0x4c/0x110 [ 807.989442] el0_svc_common.constprop.3+0xfc/0x120 [ 807.989458] do_el0_svc+0x2c/0x90 [ 807.989473] el0_svc+0x24/0x60 [ 807.989544] el0t_64_sync_handler+0x90/0xb8 [ 807.989558] el0t_64_sync+0x1a0/0x1a4 [ 807.989579] Code: b9403801 f9402800 7100003f 8b35cc00 (b9400416) [ 807.989627] ---[ end t ---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

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	b5cf88e46badea6d600d8515edea23814e03444d ~ e9f6972ab40a82bd7f6d36800792ba2e084474d8	-
Linux	Linux	4.1	-

II. Public POCs for CVE-2022-49945

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2022-49945

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https://www.cve.org/CVERecord?id=CVE-2022-49945

Same Patch Batch · Linux · 2025-06-18 · 362 CVEs total

CVE-2025-38075	9.8 CRITICAL	scsi: target: iscsi: Fix timeout on deleted connection
CVE-2022-50098	8.8 HIGH	scsi: qla2xxx: Fix crash due to stale SRB access around I/O timeouts
CVE-2025-38052	8.8 HIGH	net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done
CVE-2022-49934	8.8 HIGH	wifi: mac80211: Fix UAF in ieee80211_scan_rx()
CVE-2022-50164	8.8 HIGH	wifi: iwlwifi: mvm: fix double list_add at iwl_mvm_mac_wake_tx_queue
CVE-2025-38016	8.8 HIGH	HID: bpf: abort dispatch if device destroyed
CVE-2025-38074	8.8 HIGH	vhost-scsi: protect vq->log_used with vq->mutex
CVE-2022-49974	8.8 HIGH	HID: nintendo: fix rumble worker null pointer deref
CVE-2022-49968	8.0 HIGH	ieee802154/adf7242: defer destroy_workqueue call
CVE-2022-49944	7.8 HIGH	Revert "usb: typec: ucsi: add a common function ucsi_unregister_connectors()"
CVE-2022-49952	7.8 HIGH	misc: fastrpc: fix memory corruption on probe
CVE-2022-50028	7.8 HIGH	gadgetfs: ep_io - wait until IRQ finishes
CVE-2022-49939	7.8 HIGH	binder: fix UAF of ref->proc caused by race condition
CVE-2022-49935	7.8 HIGH	dma-buf/dma-resv: check if the new fence is really later
CVE-2025-38082	7.8 HIGH	gpio: virtuser: fix potential out-of-bound write
CVE-2022-50182	7.8 HIGH	media: imx-jpeg: Align upwards buffer size
CVE-2025-38080	7.8 HIGH	drm/amd/display: Increase block_sequence array size
CVE-2025-38060	7.8 HIGH	bpf: copy_verifier_state() should copy 'loop_entry' field
CVE-2025-38062	7.8 HIGH	genirq/msi: Store the IOMMU IOVA directly in msi_desc instead of iommu_cookie
CVE-2022-50101	7.8 HIGH	video: fbdev: vt8623fb: Check the size of screen before memset_io()

Showing top 20 of 362 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux

Same vendor: Linux

V. Comments for CVE-2022-49945

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

CVE-2022-49945— hwmon: (gpio-fan) Fix array out of bounds access

Quick assessment

Possible ATT&CK Techniques 2 AI

Affected Version Matrix 18

I. Basic Information for CVE-2022-49945

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-2022-49945

III. Intelligence Information for CVE-2022-49945

Same Patch Batch · Linux · 2025-06-18 · 362 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2022-49945

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