i2c: i801: Don't generate an interrupt on bus reset (Linux Linux)

CVE-2021-47153
HIGH 7.8

At a glance

Source
NVD
EPSS
EPSS 0.23 % · percentile 14 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: i2c: i801: Don't generate an interrupt on bus reset Now that the i2c-i801 driver supports interrupts, setting the KILL bit in a attempt to recover from a timed out transaction triggers an interrupt. Unfortunately, the interrupt handler (i801_isr) is not prepared for this situation and will try to process the interrupt as if it was signaling the end of a successful transaction. In the case of a block transaction, this can result in an out-of-range memory access. This condition was reproduced several times by syzbot: https://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e https://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e https://syzkaller.appspot.com/bug?extid=c8ff0b6d6c73d81b610e https://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb https://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a https://syzkaller.appspot.com/bug?extid=b4d3fd1dfd53e90afd79 So disable interrupts while trying to reset the bus. Interrupts will be enabled again for the following transaction.

Weaknesses (CWE)

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1MEDIUM 6.0CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:HCISA-ADP
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1HIGH 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HNVD · nvd@nist.gov (Primary)
CVSS 3.1MEDIUM 6.0CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:HNVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected 636752bcb5177a301d0266270661581de8624828 < f9469082126cebb7337db3992d143f5e4edfe629 ; affected 636752bcb5177a301d0266270661581de8624828 < 09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3 ; affected 636752bcb5177a301d0266270661581de8624828 < dfa8929e117b0228a7765f5c3f5988a4a028f3c6 ; affected 636752bcb5177a301d0266270661581de8624828 < c70e1ba2e7e65255a0ce004f531dd90dada97a8c ; affected 636752bcb5177a301d0266270661581de8624828 < 04cc05e3716ae31b17ecdab7bc55c8170def1b8b ; affected 636752bcb5177a301d0266270661581de8624828 < b523feb7e8e44652f92f3babb953a976e7ccbbef
Linux · Linuxaffected 3.6 ; unaffected 0 < 3.6 ; unaffected 4.4.271 ≤ 4.4.* ; unaffected 4.9.271 ≤ 4.9.* ; unaffected 4.14.235 ≤ 4.14.* ; unaffected 4.19.193 ≤ 4.19.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD