CVE-2024-35974

2024-05-2010:15:12

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

web.nvd.nist.gov

linux kernel

vulnerability

block

q->blkg_list corruption

fix

disk rebind

list corruption

blk_alloc_queue

nvd

6.9 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.5%

JSON

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

block: fix q->blkg_list corruption during disk rebind

Multiple gendisk instances can allocated/added for single request queue
in case of disk rebind. blkg may still stay in q->blkg_list when calling
blkcg_init_disk() for rebind, then q->blkg_list becomes corrupted.

Fix the list corruption issue by:

add blkg_init_queue() to initialize q->blkg_list & q->blkcg_mutex only
move calling blkg_init_queue() into blk_alloc_queue()

The list corruption should be started since commit f1c006f1c685 (“blk-cgroup:
synchronize pd_free_fn() from blkg_free_workfn() and blkcg_deactivate_policy()”)
which delays removing blkg from q->blkg_list into blkg_free_workfn().

Affected configurations

Vulners

Node

linuxlinux_kernelRange5.18–6.6.28

linuxlinux_kernelRange6.7.0–6.8.7

linuxlinux_kernelRange6.9.0≥

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",
      "block/blk-cgroup.h",
      "block/blk-core.c"
    ],
    "versions": [
      {
        "version": "1059699f87eb",
        "lessThan": "740ffad95ca8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1059699f87eb",
        "lessThan": "858c489d81d6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1059699f87eb",
        "lessThan": "8b8ace080319",
        "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",
      "block/blk-cgroup.h",
      "block/blk-core.c"
    ],
    "versions": [
      {
        "version": "5.18",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.18",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.28",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.7",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]