CVE-2022-50394
i2c: ismt: Fix an out-of-bounds bug in ismt_access()
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Timeline
ID reserved
By Linux
- 1 day later
· 1 day later
Published
- 11 months later
· 11 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CISA-ADPADP (enrichment) | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 – < 4a7bb1d93addb2f67e36fed00a53cb7f270d7b7a
- affected 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 – < 03b7ef7a6c5ca1ff553470166b4919db88b810f6
- affected 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 – < bfe41d966c860a8ad4c735639d616da270c92735
- affected 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 – < cdcbae2c5003747ddfd14e29db9c1d5d7e7c44dd
- affected 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 – < 9ac541a0898e8ec187a3fa7024b9701cffae6bf2
- affected 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 – < 96c12fd0ec74641295e1c3c34dea3dce1b6c3422
- affected 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 – < a642469d464b2780a25a49b51ae56623c65eac34
- affected 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 – < 233348a04becf133283f0076e20b317302de21d9
- affected 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9 – < 39244cc754829bf707dccd12e2ce37510f5b1f8d
- affected 3.9
- unaffected < 3.9
- unaffected 4.9.337 – ≤ 4.9.*
- unaffected 4.14.303 – ≤ 4.14.*
- unaffected 4.19.270 – ≤ 4.19.*
- unaffected 5.4.229 – ≤ 5.4.*
- unaffected 5.10.163 – ≤ 5.10.*
- unaffected 5.15.86 – ≤ 5.15.*
- unaffected 6.0.16 – ≤ 6.0.*
- unaffected 6.1.2 – ≤ 6.1.*
- unaffected 6.2 – ≤ *
References (9)
- https://git.kernel.org/stable/c/4a7bb1d93addb2f67e36fed00a53cb7f270d7b7a (opens in a new tab)
- https://git.kernel.org/stable/c/03b7ef7a6c5ca1ff553470166b4919db88b810f6 (opens in a new tab)
- https://git.kernel.org/stable/c/bfe41d966c860a8ad4c735639d616da270c92735 (opens in a new tab)
- https://git.kernel.org/stable/c/cdcbae2c5003747ddfd14e29db9c1d5d7e7c44dd (opens in a new tab)
- https://git.kernel.org/stable/c/9ac541a0898e8ec187a3fa7024b9701cffae6bf2 (opens in a new tab)
- https://git.kernel.org/stable/c/96c12fd0ec74641295e1c3c34dea3dce1b6c3422 (opens in a new tab)
- https://git.kernel.org/stable/c/a642469d464b2780a25a49b51ae56623c65eac34 (opens in a new tab)
- https://git.kernel.org/stable/c/233348a04becf133283f0076e20b317302de21d9 (opens in a new tab)
- https://git.kernel.org/stable/c/39244cc754829bf707dccd12e2ce37510f5b1f8d (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-50394)Record last updated .