CVE-2022-48991: mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths

Affected versions

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

• linux linux kernel4.8 and later · before 4.9.337
• linux linux kernel4.10 and later · before 4.14.303
• linux linux kernel4.15 and later · before 4.19.270
• 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

  • 4.8affected
  • f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 and later · before 275c626c131cfe141beeb6c575e31fa53d32da19affected · git
  • f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 and later · before c23105673228c349739e958fa33955ed8faddcafaffected · git
  • f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 and later · before ff2a1a6f869650aec99e9d070b5ab625bfbc5bc3affected · git
  • f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 and later · before 5ffc2a75534d9d74d49760f983f8eb675fa63d69affected · git
  • f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 and later · before 7f445ca2e0e59c7971d0b7b853465e50844ab596affected · git
  • f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 and later · before 1a3f8c6cd29d9078cc81b29d39d0e9ae1d6a03c3affected · git
  • f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 and later · before 5450535901d89a5dcca5fbbc59a24fe89caeb465affected · git
  • f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 and later · before f268f6cf875f3220afc77bdd0bf1bb136eb54db9affected · git
  • before 4.8not 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-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
  90Now
• 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

Published before and after this one in the same product

• ← EarlierCVE-2022-48989Oct 21, 2024 · fscache: Fix oops due to race with cookie_lru and use_cookie
  18Monitor
• ← EarlierCVE-2022-48990Oct 21, 2024 · drm/amdgpu: fix use-after-free during gpu recovery
  31Monitor
• Later →CVE-2022-48992Oct 21, 2024 · ASoC: soc-pcm: Add NULL check in BE reparenting
  22Monitor

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.