memcg: fix possible use-after-free in memcg_write_event_control()

Affected versions

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

• linux linux kernel3.14 and later · before 4.14.302
• linux linux kernel4.15 and later · before 4.19.269
• linux linux kernel4.20 and later · before 5.4.227
• linux linux kernel5.5 and later · before 5.10.159
• linux linux kernel5.11 and later · before 5.15.83
• linux linux kernel5.16 and later · before 6.0.13
• linux linux kernel6.1

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

  • 3.14affected
  • 347c4a8747104a945ecced358944e42879176ca5 and later · before b77600e26fd48727a95ffd50ba1e937efb548125affected · git
  • 347c4a8747104a945ecced358944e42879176ca5 and later · before e1ae97624ecf400ea56c238bff23e5cd139df0b8affected · git
  • 347c4a8747104a945ecced358944e42879176ca5 and later · before 35963b31821920908e397146502066f6b032c917affected · git
  • 347c4a8747104a945ecced358944e42879176ca5 and later · before f1f7f36cf682fa59db15e2089039a2eeb58ff2adaffected · git
  • 347c4a8747104a945ecced358944e42879176ca5 and later · before aad8bbd17a1d586005feb9226c2e9cfce1432e13affected · git
  • 347c4a8747104a945ecced358944e42879176ca5 and later · before 0ed074317b835caa6c03bcfa8f133365324673dcaffected · git
  • 347c4a8747104a945ecced358944e42879176ca5 and later · before 4a7ba45b1a435e7097ca0f79a847d0949d0eb088affected · git
  • before 3.14not affected · semver
  • 4.14.302 and later · up to and including 4.14.*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

Published before and after this one in the same product

• ← EarlierCVE-2022-48986Oct 21, 2024 · mm/gup: fix gup_pud_range() for dax
  22Monitor
• ← EarlierCVE-2022-48987Oct 21, 2024 · media: v4l2-dv-timings.c: fix too strict blanking sanity checks
  22Monitor
• Later →CVE-2022-48989Oct 21, 2024 · fscache: Fix oops due to race with cookie_lru and use_cookie
  18Monitor

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.