CVE-2024-38663

2024-06-2414:15:12

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

cve-2024-38663

linux kernel

blk-cgroup

list corruption

io stat

vulnerability

fix

commit 3b8cc6298724

percpu list

blkcg_reset_stats

6.7 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.7%

JSON

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

blk-cgroup: fix list corruption from resetting io stat

Since commit 3b8cc6298724 (“blk-cgroup: Optimize blkcg_rstat_flush()”),
each iostat instance is added to blkcg percpu list, so blkcg_reset_stats()
can’t reset the stat instance by memset(), otherwise the llist may be
corrupted.

Fix the issue by only resetting the counter part.

Affected configurations

Vulners

Node

linuxlinux_kernelRange6.2–6.6.33

linuxlinux_kernelRange6.7.0–6.9.4

linuxlinux_kernelRange6.10.0–6.10-rc1

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "block/blk-cgroup.c"
    ],
    "versions": [
      {
        "version": "3b8cc6298724",
        "lessThan": "d4a60298ac34",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3b8cc6298724",
        "lessThan": "89bb36c72e19",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3b8cc6298724",
        "lessThan": "6da668063279",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "block/blk-cgroup.c"
    ],
    "versions": [
      {
        "version": "6.2",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.2",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.33",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.4",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]