CVE-2025-21739scsi: ufs: core: Fix use-after free in init error and remove paths

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Fix use-after free in init error and remove paths devm_blk_crypto_profile_init() registers a cleanup handler to run when the associated (platform-) device is being released. For UFS, the crypto private data and pointers are stored as part of the ufs_hba's data structure 'struct ufs_hba::crypto_profile'. This structure is allocated as part of the underlying ufshcd and therefore Scsi_host allocation. During driver release or during error handling in ufshcd_pltfrm_init(), this structure is released as part of ufshcd_dealloc_host() before the (platform-) device associated with the crypto call above is released. Once this device is released, the crypto cleanup code will run, using the just-released 'struct ufs_hba::crypto_profile'. This causes a use-after-free situation: Call trace: kfree+0x60/0x2d8 (P) kvfree+0x44/0x60 blk_crypto_profile_destroy_callback+0x28/0x70 devm_action_release+0x1c/0x30 release_nodes+0x6c/0x108 devres_release_all+0x98/0x100 device_unbind_cleanup+0x20/0x70 really_probe+0x218/0x2d0 In other words, the initialisation code flow is: platform-device probe ufshcd_pltfrm_init() ufshcd_alloc_host() scsi_host_alloc() allocation of struct ufs_hba creation of scsi-host devices devm_blk_crypto_profile_init() devm registration of cleanup handler using platform-device and during error handling of ufshcd_pltfrm_init() or during driver removal: ufshcd_dealloc_host() scsi_host_put() put_device(scsi-host) release of struct ufs_hba put_device(platform-device) crypto cleanup handler To fix this use-after free, change ufshcd_alloc_host() to register a devres action to automatically cleanup the underlying SCSI device on ufshcd destruction, without requiring explicit calls to ufshcd_dealloc_host(). This way: * the crypto profile and all other ufs_hba-owned resources are destroyed before SCSI (as they've been registered after) * a memleak is plugged in tc-dwc-g210-pci.c remove() as a side-effect * EXPORT_SYMBOL_GPL(ufshcd_dealloc_host) can be removed fully as it's not needed anymore * no future drivers using ufshcd_alloc_host() could ever forget adding the cleanup

Timeline

Scores

EPSS (exploitation in 30 days)

0.22% · top 87% of all CVEs (13 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Affected products

• Linux · Linux

  • affected d76d9d7d1009968dd3a0fc30e5f5ee9fbffc1350 – < 0a6895c03b1f439236e2d22b1a69ebfc1eb9d5ea
  • affected d76d9d7d1009968dd3a0fc30e5f5ee9fbffc1350 – < d06eb2620d3bf16056b8b7ea3744dbb5e30512f4
  • affected d76d9d7d1009968dd3a0fc30e5f5ee9fbffc1350 – < 0dc539b888fb5f56b6eeddd95433eab557d4b0c1
  • affected d76d9d7d1009968dd3a0fc30e5f5ee9fbffc1350 – < 0c77c0d754fe83cb154715fcfec6c3faef94f207
  • affected d76d9d7d1009968dd3a0fc30e5f5ee9fbffc1350 – < 9c185beae09a3eb85f54777edafa227f7e03075d
  • affected d76d9d7d1009968dd3a0fc30e5f5ee9fbffc1350 – < f8fb2403ddebb5eea0033d90d9daae4c88749ada

• Linux · Linux

  • affected 5.12
  • unaffected < 5.12
  • unaffected 5.15.209 – ≤ 5.15.*
  • unaffected 6.1.175 – ≤ 6.1.*
  • unaffected 6.6.135 – ≤ 6.6.*
  • unaffected 6.12.14 – ≤ 6.12.*
  • unaffected 6.13.3 – ≤ 6.13.*
  • unaffected 6.14 – ≤ *

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• EUVD EUVD-2025-5177 (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2025-21739](https://cveledger.app/badge/CVE-2025-21739.svg)](https://cveledger.app/cve/CVE-2025-21739)

Record last updated 1 Jun 2026, 16:05 UTC.