CVE-2022-48821: misc: fastrpc: avoid double fput() on failed usercopy

Affected versions

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

• linux linux kernel5.1 and later · before 5.4.180
• linux linux kernel5.5 and later · before 5.10.101
• linux linux kernel5.11 and later · before 5.15.24
• linux linux kernel5.16 and later · before 5.16.10
• linux linux kernel5.17

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

  • 5.1affected
  • 6cffd79504ce040f460831030d3069fa1c99bb71 and later · before 4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215affected · git
  • 6cffd79504ce040f460831030d3069fa1c99bb71 and later · before a5ce7ee5fcc07583159f54ab4af5164de00148f5affected · git
  • 6cffd79504ce040f460831030d3069fa1c99bb71 and later · before e4382d0a39f9a1e260d62fdc079ddae5293c037daffected · git
  • 6cffd79504ce040f460831030d3069fa1c99bb71 and later · before 76f85c307ef9f10aa2cef1b1d5ee654c1f3345fcaffected · git
  • 6cffd79504ce040f460831030d3069fa1c99bb71 and later · before 46963e2e0629cb31c96b1d47ddd89dc3d8990b34affected · git
  • before 5.1not affected · semver
  • 5.4.180 and later · up to and including 5.4.*not affected · semver
  • 5.10.101 and later · up to and including 5.10.*not affected · semver
  • 5.15.24 and later · up to and including 5.15.*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-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-2022-48819Jul 16, 2024 · tcp: take care of mixed splice()/sendmsg(MSG_ZEROCOPY) case
  22Monitor
• ← EarlierCVE-2022-48820Jul 16, 2024 · phy: stm32: fix a refcount leak in stm32_usbphyc_pll_enable()
  28Monitor
• Later →CVE-2022-48822Jul 16, 2024 · usb: f_fs: Fix use-after-free for epfile
  31Monitor

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.