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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2025-40322

fbdev: bitblit: bound-check glyph index in bit_putcs*

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: fbdev: bitblit: bound-check glyph index in bit_putcs* bit_putcs_aligned()/unaligned() derived the glyph pointer from the character value masked by 0xff/0x1ff, which may exceed the actual font's glyph count and read past the end of the built-in font array. Clamp the index to the actual glyph count before computing the address. This fixes a global out-of-bounds read reported by syzbot.

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

  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < a10cede006f9614b465cf25609a8753efbfd45ccaffected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 0998a6cb232674408a03e8561dc15aa266b2f53baffected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < db5c9a162d2f42bcc842b76b3d935dcc050a0eecaffected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < c12003bf91fdff381c55ef54fef3e961a5af2545affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 9ba1a7802ca9a2590cef95b253e6526f4364477faffected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 901f44227072be60812fe8083e83e1533c04eed1affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < efaf89a75a29b2d179bf4fe63ca62852e93ad620affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 18c4ef4e765a798b47980555ed665d78b71aeadfaffected

Linux Linux

Default version status: affected

  • 2.6.12affected
  • 0 to < 2.6.12unaffected
  • 5.4.302 to ≤ 5.4.*unaffected
  • 5.10.247 to ≤ 5.10.*unaffected
  • 5.15.197 to ≤ 5.15.*unaffected
  • 6.1.159 to ≤ 6.1.*unaffected
  • 6.6.117 to ≤ 6.6.*unaffected
  • 6.12.58 to ≤ 6.12.*unaffected
  • 6.17.8 to ≤ 6.17.*unaffected
  • 6.18 to ≤ *unaffected

References