blk-cgroup: fix UAF in __blkcg_rstat_flush()

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• linux linux kernel6.3.9 and later · before 6.4
• linux linux kernel6.4.1 and later · before 6.6.144
• linux linux kernel6.7 and later · before 6.12.95
• linux linux kernel6.13 and later · before 6.18.38
• linux linux kernel6.19 and later · before 7.1.3
• linux linux kernel6.4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

• Linux Linux

  • 0f6090d90f627d8c58f939067d6c6821ce1b3c68, 6.4affected
  • 20cb1c2fb7568a6054c55defe044311397e01ddb and later · before 96e545410c4f74c89d496c1d5d9ef8d08f14368baffected · git
  • 20cb1c2fb7568a6054c55defe044311397e01ddb and later · before bbebd9425cad3573d1527441753899b926525a0faffected · git
  • 20cb1c2fb7568a6054c55defe044311397e01ddb and later · before 5e5b7f2ef854936e95dceb6a2fdfefcb7152d2c6affected · git
  • 20cb1c2fb7568a6054c55defe044311397e01ddb and later · before afebe44facc48a61761e885bbb7f0380d4a603ecaffected · git
  • 20cb1c2fb7568a6054c55defe044311397e01ddb and later · before 0ab5ee5a1badb58cbb2242617cb01a4972b1f2a2affected · git
  • 6.3.9 and later · before 6.4affected · semver
  • before 6.4not affected · semver
  • 6.6.144 and later · up to and including 6.6.*not affected · semver
  • 6.12.95 and later · up to and including 6.12.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
  89Now
• CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
  85Now
• CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
  83Now
• CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV
  77This week
• CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV
  77This week
• CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV
  77This week

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1free(dev->buf);2/* ... another thread is still running ... */3process(dev->buf);

1lock(&dev->lock);2free(dev->buf);3dev->buf = NULL;4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.