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CVE-2022-50394— i2c: ismt: Fix an out-of-bounds bug in ismt_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，该漏洞源于未检查用户数据大小，可能导致越界写入。

CVSS 7.8 · High EPSS 0.17% · P6

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9< 4a7bb1d93addb2f67e36fed00a53cb7f270d7b7a affected
13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9< 03b7ef7a6c5ca1ff553470166b4919db88b810f6 affected
13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9< bfe41d966c860a8ad4c735639d616da270c92735 affected
13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9< cdcbae2c5003747ddfd14e29db9c1d5d7e7c44dd affected
13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9< 9ac541a0898e8ec187a3fa7024b9701cffae6bf2 affected
13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9< 96c12fd0ec74641295e1c3c34dea3dce1b6c3422 affected
13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9< a642469d464b2780a25a49b51ae56623c65eac34 affected
13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9< 233348a04becf133283f0076e20b317302de21d9 affected
… +12 more rows
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I. Basic Information for CVE-2022-50394

Vulnerability Information
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Vulnerability Title
i2c: ismt: Fix an out-of-bounds bug in ismt_access()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: i2c: ismt: Fix an out-of-bounds bug in ismt_access() When the driver does not check the data from the user, the variable 'data->block[0]' may be very large to cause an out-of-bounds bug. The following log can reveal it: [ 33.995542] i2c i2c-1: ioctl, cmd=0x720, arg=0x7ffcb3dc3a20 [ 33.995978] ismt_smbus 0000:00:05.0: I2C_SMBUS_BLOCK_DATA: WRITE [ 33.996475] ================================================================== [ 33.996995] BUG: KASAN: out-of-bounds in ismt_access.cold+0x374/0x214b [ 33.997473] Read of size 18446744073709551615 at addr ffff88810efcfdb1 by task ismt_poc/485 [ 33.999450] Call Trace: [ 34.001849] memcpy+0x20/0x60 [ 34.002077] ismt_access.cold+0x374/0x214b [ 34.003382] __i2c_smbus_xfer+0x44f/0xfb0 [ 34.004007] i2c_smbus_xfer+0x10a/0x390 [ 34.004291] i2cdev_ioctl_smbus+0x2c8/0x710 [ 34.005196] i2cdev_ioctl+0x5ec/0x74c Fix this bug by checking the size of 'data->block[0]' first.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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，该漏洞源于未检查用户数据大小，可能导致越界写入。
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 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 ~ 4a7bb1d93addb2f67e36fed00a53cb7f270d7b7a -
Linux Linux 3.9 -

II. Public POCs for CVE-2022-50394

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III. Intelligence Information for CVE-2022-50394

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Same Patch Batch · Linux · 2025-09-18 · 121 CVEs total

CVE-2023-53382 9.8 CRITICAL net/smc: Reset connection when trying to use SMCRv2 fails.
CVE-2022-50401 9.8 CRITICAL nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure
CVE-2022-50410 9.8 CRITICAL NFSD: Protect against send buffer overflow in NFSv2 READ
CVE-2022-50413 8.8 HIGH wifi: mac80211: fix use-after-free
CVE-2022-50419 8.8 HIGH Bluetooth: hci_sysfs: Fix attempting to call device_add multiple times
CVE-2023-53374 8.8 HIGH Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early
CVE-2023-53431 8.8 HIGH scsi: ses: Handle enclosure with just a primary component gracefully
CVE-2023-53432 8.8 HIGH firewire: net: fix use after free in fwnet_finish_incoming_packet()
CVE-2022-50386 8.8 HIGH Bluetooth: L2CAP: Fix user-after-free
CVE-2023-53372 8.2 HIGH sctp: fix a potential overflow in sctp_ifwdtsn_skip
CVE-2023-53386 7.8 HIGH Bluetooth: Fix potential use-after-free when clear keys
CVE-2023-53387 7.8 HIGH scsi: ufs: core: Fix device management cmd timeout flow
CVE-2022-50399 7.8 HIGH media: atomisp: prevent integer overflow in sh_css_set_black_frame()
CVE-2023-53429 7.8 HIGH btrfs: don't check PageError in __extent_writepage
CVE-2023-53373 7.8 HIGH crypto: seqiv - Handle EBUSY correctly
CVE-2023-53378 7.8 HIGH drm/i915/dpt: Treat the DPT BO as a framebuffer
CVE-2023-53398 7.8 HIGH mlx5: fix possible ptp queue fifo use-after-free
CVE-2023-53426 7.8 HIGH xsk: Fix xsk_diag use-after-free error during socket cleanup
CVE-2023-53388 7.8 HIGH drm/mediatek: Clean dangling pointer on bind error path
CVE-2023-53377 7.8 HIGH cifs: prevent use-after-free by freeing the cfile later

Showing top 20 of 121 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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