ghsa-vpgg-8ccq-gwhg
Vulnerability from github
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.
{
"affected": [],
"aliases": [
"CVE-2021-47153"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-25T09:15:09Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: i801: Don\u0027t generate an interrupt on bus reset\n\nNow that the i2c-i801 driver supports interrupts, setting the KILL bit\nin a attempt to recover from a timed out transaction triggers an\ninterrupt. Unfortunately, the interrupt handler (i801_isr) is not\nprepared for this situation and will try to process the interrupt as\nif it was signaling the end of a successful transaction. In the case\nof a block transaction, this can result in an out-of-range memory\naccess.\n\nThis condition was reproduced several times by syzbot:\nhttps://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e\nhttps://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e\nhttps://syzkaller.appspot.com/bug?extid=c8ff0b6d6c73d81b610e\nhttps://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb\nhttps://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a\nhttps://syzkaller.appspot.com/bug?extid=b4d3fd1dfd53e90afd79\n\nSo disable interrupts while trying to reset the bus. Interrupts will\nbe enabled again for the following transaction.",
"id": "GHSA-vpgg-8ccq-gwhg",
"modified": "2024-11-05T18:31:58Z",
"published": "2024-03-25T09:32:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47153"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbef"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.