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CVE PROGRAM SOURCE RECORDUnscored

CVE-2025-38585

staging: media: atomisp: Fix stack buffer overflow in gmin_get_var_int()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: staging: media: atomisp: Fix stack buffer overflow in gmin_get_var_int() When gmin_get_config_var() calls efi.get_variable() and the EFI variable is larger than the expected buffer size, two behaviors combine to create a stack buffer overflow: 1. gmin_get_config_var() does not return the proper error code when efi.get_variable() fails. It returns the stale 'ret' value from earlier operations instead of indicating the EFI failure. 2. When efi.get_variable() returns EFI_BUFFER_TOO_SMALL, it updates *out_len to the required buffer size but writes no data to the output buffer. However, due to bug #1, gmin_get_var_int() believes the call succeeded. The caller gmin_get_var_int() then performs: - Allocates val[CFG_VAR_NAME_MAX + 1] (65 bytes) on stack - Calls gmin_get_config_var(dev, is_gmin, var, val, &len) with len=64 - If EFI variable is >64 bytes, efi.get_variable() sets len=required_size - Due to bug #1, thinks call succeeded with len=required_size - Executes val[len] = 0, writing past end of 65-byte stack buffer This creates a stack buffer overflow when EFI variables are larger than 64 bytes. Since EFI variables can be controlled by firmware or system configuration, this could potentially be exploited for code execution. Fix the bug by returning proper error codes from gmin_get_config_var() based on EFI status instead of stale 'ret' value. The gmin_get_var_int() function is called during device initialization for camera sensor configuration on Intel Bay Trail and Cherry Trail platforms using the atomisp camera stack.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • a49d25364dfb9f8a64037488a39ab1f56c5fa419 to < 51b8dc5163d2ff2bf04019f8bf7e3bd0e75bb654affected
  • ad85094b293e40e7a2f831b0311a389d952ebd5e to < 3d672fe065aa00f4d66f42e3c9720f69a3ed43e7affected
  • ad85094b293e40e7a2f831b0311a389d952ebd5e to < e6d3453a002e89537e6136f6c774659b297a549baffected
  • ad85094b293e40e7a2f831b0311a389d952ebd5e to < 1a7a2f59fb2eb0718a0cff1e5822500cefe50ed9affected
  • ad85094b293e40e7a2f831b0311a389d952ebd5e to < ee4cf798202d285dcbe85e4467a094c44f5ed8e6affected

Linux Linux

Default version status: affected

  • 4.12affected
  • 5.8affected
  • 0 to < 4.12unaffected
  • 4.18 to < 5.8unaffected
  • 6.12.42 to ≤ 6.12.*unaffected
  • 6.15.10 to ≤ 6.15.*unaffected
  • 6.16.1 to ≤ 6.16.*unaffected
  • 6.17 to ≤ *unaffected

References