CVE-2025-40322 (GCVE-0-2025-40322)

Vulnerability from cvelistv5 – Published: 2025-12-08 00:46 – Updated: 2026-06-16 19:34
VLAI
Title
fbdev: bitblit: bound-check glyph index in bit_putcs*
Summary
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.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a10cede006f9614b465cf25609a8753efbfd45cc (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0998a6cb232674408a03e8561dc15aa266b2f53b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < db5c9a162d2f42bcc842b76b3d935dcc050a0eec (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c12003bf91fdff381c55ef54fef3e961a5af2545 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9ba1a7802ca9a2590cef95b253e6526f4364477f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 901f44227072be60812fe8083e83e1533c04eed1 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < efaf89a75a29b2d179bf4fe63ca62852e93ad620 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 18c4ef4e765a798b47980555ed665d78b71aeadf (git)
Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.4.302 , ≤ 5.4.* (semver)
Unaffected: 5.10.247 , ≤ 5.10.* (semver)
Unaffected: 5.15.197 , ≤ 5.15.* (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.117 , ≤ 6.6.* (semver)
Unaffected: 6.12.58 , ≤ 6.12.* (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.