CVE-2024-26606 binder: signal epoll threads of self-work

2024-02-2614:39:15

Linux

github.com

linux

kernel

binder

vulnerability

epoll

threads

AI Score

7.3

Confidence

Low

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

In the Linux kernel, the following vulnerability has been resolved:

binder: signal epoll threads of self-work

In (e)poll mode, threads often depend on I/O events to determine when
data is ready for consumption. Within binder, a thread may initiate a
command via BINDER_WRITE_READ without a read buffer and then make use
of epoll_wait() or similar to consume any responses afterwards.

It is then crucial that epoll threads are signaled via wakeup when they
queue their own work. Otherwise, they risk waiting indefinitely for an
event leaving their work unhandled. What is worse, subsequent commands
won’t trigger a wakeup either as the thread has pending work.

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "457b9a6f09f0",
        "lessThan": "dd64bb8329ce",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "457b9a6f09f0",
        "lessThan": "42beab162dce",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "457b9a6f09f0",
        "lessThan": "a423042052ec",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "457b9a6f09f0",
        "lessThan": "82722b453dc2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "457b9a6f09f0",
        "lessThan": "90e09c016d72",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "457b9a6f09f0",
        "lessThan": "a7ae586f6f60",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "457b9a6f09f0",
        "lessThan": "93b372c39c40",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "457b9a6f09f0",
        "lessThan": "97830f3c3088",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/android/binder.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.29"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.29",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "4.19.307",
        "versionType": "custom",
        "lessThanOrEqual": "4.19.*"
      },
      {
        "status": "unaffected",
        "version": "5.4.269",
        "versionType": "custom",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.210",
        "versionType": "custom",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.149",
        "versionType": "custom",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.79",
        "versionType": "custom",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.18",
        "versionType": "custom",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.7.6",
        "versionType": "custom",
        "lessThanOrEqual": "6.7.*"
      },
      {
        "status": "unaffected",
        "version": "6.8",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/android/binder.c"
    ],
    "defaultStatus": "affected"
  }
]