CVE-2021-47571: staging: rtl8192e: Fix use after free in _rtl92e_pci_disconnect()

Affected versions

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

• linux linux kernel3.2 and later · before 4.4.294
• linux linux kernel4.5 and later · before 4.9.292
• linux linux kernel4.10 and later · before 4.14.257
• linux linux kernel4.15 and later · before 4.19.219
• linux linux kernel4.20 and later · before 5.4.163
• linux linux kernel5.5 and later · before 5.10.83
• linux linux kernel5.11 and later · before 5.15.6

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

  • 3.2affected
  • 66898177e7e5486dc77a4ba742efa4e2e9e900a4 and later · before d43aecb694b10db9a4228ce2d38b5ae8de374443affected · git
  • 66898177e7e5486dc77a4ba742efa4e2e9e900a4 and later · before 9186680382934b0e7529d3d70dcc0a21d087683baffected · git
  • 66898177e7e5486dc77a4ba742efa4e2e9e900a4 and later · before c0ef0e75a858cbd8618b473f22fbca36106dcf82affected · git
  • 66898177e7e5486dc77a4ba742efa4e2e9e900a4 and later · before bca19bb2dc2d89ce60c4a4a6e59609d4cf2e13efaffected · git
  • 66898177e7e5486dc77a4ba742efa4e2e9e900a4 and later · before 2e1ec01af2c7139c6a600bbfaea1a018b35094b6affected · git
  • 66898177e7e5486dc77a4ba742efa4e2e9e900a4 and later · before 8d0163cec7de995f9eb9c3128c83fb84f0cb1c64affected · git
  • 66898177e7e5486dc77a4ba742efa4e2e9e900a4 and later · before e27ee2f607fe6a9b923ef1fc65461c0613c97594affected · git
  • 66898177e7e5486dc77a4ba742efa4e2e9e900a4 and later · before b535917c51acc97fb0761b1edec85f1f3d02bda4affected · git
  • before 3.2not 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-2021-47569May 24, 2024 · io_uring: fail cancellation for EXITING tasks
  22Monitor
• ← EarlierCVE-2021-47570May 24, 2024 · staging: r8188eu: fix a memory leak in rtw_wx_read32()
  22Monitor
• Later →CVE-2021-47572May 24, 2024 · net: nexthop: fix null pointer dereference when IPv6 is not enabled
  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.