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vuln-cve/data/2022/49xxx/CVE-2022-49945.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2022-49945",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-06-18T10:57:27.381Z",
"datePublished": "2025-06-18T11:00:01.037Z",
"dateUpdated": "2026-05-11T19:09:42.968Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-05-11T19:09:42.968Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (gpio-fan) Fix array out of bounds access\n\nThe driver does not check if the cooling state passed to\ngpio_fan_set_cur_state() exceeds the maximum cooling state as\nstored in fan_data->num_speeds. Since the cooling state is later\nused as an array index in set_fan_speed(), an array out of bounds\naccess can occur.\nThis can be exploited by setting the state of the thermal cooling device\nto arbitrary values, causing for example a kernel oops when unavailable\nmemory is accessed this way.\n\nExample kernel oops:\n[ 807.987276] Unable to handle kernel paging request at virtual address ffffff80d0588064\n[ 807.987369] Mem abort info:\n[ 807.987398] ESR = 0x96000005\n[ 807.987428] EC = 0x25: DABT (current EL), IL = 32 bits\n[ 807.987477] SET = 0, FnV = 0\n[ 807.987507] EA = 0, S1PTW = 0\n[ 807.987536] FSC = 0x05: level 1 translation fault\n[ 807.987570] Data abort info:\n[ 807.987763] ISV = 0, ISS = 0x00000005\n[ 807.987801] CM = 0, WnR = 0\n[ 807.987832] swapper pgtable: 4k pages, 39-bit VAs, pgdp=0000000001165000\n[ 807.987872] [ffffff80d0588064] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000\n[ 807.987961] Internal error: Oops: 96000005 [#1] PREEMPT SMP\n[ 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\n[ 807.988508] CPU: 0 PID: 1321 Comm: bash Tainted: G C 5.15.56-v8+ #1575\n[ 807.988548] Hardware name: Raspberry Pi 3 Model B Rev 1.2 (DT)\n[ 807.988574] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ 807.988608] pc : set_fan_speed.part.5+0x34/0x80 [gpio_fan]\n[ 807.988654] lr : gpio_fan_set_cur_state+0x34/0x50 [gpio_fan]\n[ 807.988691] sp : ffffffc008cf3bd0\n[ 807.988710] x29: ffffffc008cf3bd0 x28: ffffff80019edac0 x27: 0000000000000000\n[ 807.988762] x26: 0000000000000000 x25: 0000000000000000 x24: ffffff800747c920\n[ 807.988787] x23: 000000000000000a x22: ffffff800369f000 x21: 000000001999997c\n[ 807.988854] x20: ffffff800369f2e8 x19: ffffff8002ae8080 x18: 0000000000000000\n[ 807.988877] x17: 0000000000000000 x16: 0000000000000000 x15: 000000559e271b70\n[ 807.988938] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000\n[ 807.988960] x11: 0000000000000000 x10: ffffffc008cf3c20 x9 : ffffffcfb60c741c\n[ 807.989018] x8 : 000000000000000a x7 : 00000000ffffffc9 x6 : 0000000000000009\n[ 807.989040] x5 : 000000000000002a x4 : 0000000000000000 x3 : ffffff800369f2e8\n[ 807.989062] x2 : 000000000000e780 x1 : 0000000000000001 x0 : ffffff80d0588060\n[ 807.989084] Call trace:\n[ 807.989091] set_fan_speed.part.5+0x34/0x80 [gpio_fan]\n[ 807.989113] gpio_fan_set_cur_state+0x34/0x50 [gpio_fan]\n[ 807.989199] cur_state_store+0x84/0xd0\n[ 807.989221] dev_attr_store+0x20/0x38\n[ 807.989262] sysfs_kf_write+0x4c/0x60\n[ 807.989282] kernfs_fop_write_iter+0x130/0x1c0\n[ 807.989298] new_sync_write+0x10c/0x190\n[ 807.989315] vfs_write+0x254/0x378\n[ 807.989362] ksys_write+0x70/0xf8\n[ 807.989379] __arm64_sys_write+0x24/0x30\n[ 807.989424] invoke_syscall+0x4c/0x110\n[ 807.989442] el0_svc_common.constprop.3+0xfc/0x120\n[ 807.989458] do_el0_svc+0x2c/0x90\n[ 807.989473] el0_svc+0x24/0x60\n[ 807.989544] el0t_64_sync_handler+0x90/0xb8\n[ 807.989558] el0t_64_sync+0x1a0/0x1a4\n[ 807.989579] Code: b9403801 f9402800 7100003f 8b35cc00 (b9400416)\n[ 807.989627] ---[ end t\n---truncated---"
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/hwmon/gpio-fan.c"
],
"versions": [
{
"version": "b5cf88e46badea6d600d8515edea23814e03444d",
"lessThan": "e9f6972ab40a82bd7f6d36800792ba2e084474d8",
"status": "affected",
"versionType": "git"
},
{
"version": "b5cf88e46badea6d600d8515edea23814e03444d",
"lessThan": "3ff866455e1e263a9ac1958095fd440984248e2f",
"status": "affected",
"versionType": "git"
},
{
"version": "b5cf88e46badea6d600d8515edea23814e03444d",
"lessThan": "c8ae6a18708f260ccdeef6ba53af7548457dc26c",
"status": "affected",
"versionType": "git"
},
{
"version": "b5cf88e46badea6d600d8515edea23814e03444d",
"lessThan": "7756eb1ed124753f4d64f761fc3d84290dffcb4d",
"status": "affected",
"versionType": "git"
},
{
"version": "b5cf88e46badea6d600d8515edea23814e03444d",
"lessThan": "517dba798793e69b510779c3cde7224a65f3ed1d",
"status": "affected",
"versionType": "git"
},
{
"version": "b5cf88e46badea6d600d8515edea23814e03444d",
"lessThan": "53196e0376205ed49b75bfd0475af5e0fbd20156",
"status": "affected",
"versionType": "git"
},
{
"version": "b5cf88e46badea6d600d8515edea23814e03444d",
"lessThan": "3263984c7acdcb0658155b05a724ed45a10de76d",
"status": "affected",
"versionType": "git"
},
{
"version": "b5cf88e46badea6d600d8515edea23814e03444d",
"lessThan": "f233d2be38dbbb22299192292983037f01ab363c",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/hwmon/gpio-fan.c"
],
"versions": [
{
"version": "4.1",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.1",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.9.328",
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.14.293",
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.19.258",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.213",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.142",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.66",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.19.8",
"lessThanOrEqual": "5.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.0",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.1",
"versionEndExcluding": "4.9.328"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.1",
"versionEndExcluding": "4.14.293"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.1",
"versionEndExcluding": "4.19.258"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.1",
"versionEndExcluding": "5.4.213"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.1",
"versionEndExcluding": "5.10.142"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.1",
"versionEndExcluding": "5.15.66"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.1",
"versionEndExcluding": "5.19.8"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.1",
"versionEndExcluding": "6.0"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/e9f6972ab40a82bd7f6d36800792ba2e084474d8"
},
{
"url": "https://git.kernel.org/stable/c/3ff866455e1e263a9ac1958095fd440984248e2f"
},
{
"url": "https://git.kernel.org/stable/c/c8ae6a18708f260ccdeef6ba53af7548457dc26c"
},
{
"url": "https://git.kernel.org/stable/c/7756eb1ed124753f4d64f761fc3d84290dffcb4d"
},
{
"url": "https://git.kernel.org/stable/c/517dba798793e69b510779c3cde7224a65f3ed1d"
},
{
"url": "https://git.kernel.org/stable/c/53196e0376205ed49b75bfd0475af5e0fbd20156"
},
{
"url": "https://git.kernel.org/stable/c/3263984c7acdcb0658155b05a724ed45a10de76d"
},
{
"url": "https://git.kernel.org/stable/c/f233d2be38dbbb22299192292983037f01ab363c"
}
],
"title": "hwmon: (gpio-fan) Fix array out of bounds access",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
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