ghsa-vpgg-8ccq-gwhg
Vulnerability from github
Published
2024-03-25 09:32
Modified
2024-11-05 18:31
Details

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.

Show details on source website


{
   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't 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",
      },
   ],
}


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