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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2023-53474

x86/MCE/AMD: Use an u64 for bank_map

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: x86/MCE/AMD: Use an u64 for bank_map Thee maximum number of MCA banks is 64 (MAX_NR_BANKS), see a0bc32b3cacf ("x86/mce: Increase maximum number of banks to 64"). However, the bank_map which contains a bitfield of which banks to initialize is of type unsigned int and that overflows when those bit numbers are >= 32, leading to UBSAN complaining correctly: UBSAN: shift-out-of-bounds in arch/x86/kernel/cpu/mce/amd.c:1365:38 shift exponent 32 is too large for 32-bit type 'int' Change the bank_map to a u64 and use the proper BIT_ULL() macro when modifying bits in there. [ bp: Rewrite commit message. ]

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

  • a0bc32b3cacf194dc479b342f006203fd1e1941a to < a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83affected
  • a0bc32b3cacf194dc479b342f006203fd1e1941a to < 11c58a0c1937c157dbdf82d5ab634d68c99f3098affected
  • a0bc32b3cacf194dc479b342f006203fd1e1941a to < ba8ffb1251eb629c2ec35220e3896cf4f7b888a7affected
  • a0bc32b3cacf194dc479b342f006203fd1e1941a to < 9669fa17287c3af2bbd4868d4c8fdd9e57f8332eaffected
  • a0bc32b3cacf194dc479b342f006203fd1e1941a to < 67bb7521b6420d81dab7538c0686f18f7d6d09f4affected
  • a0bc32b3cacf194dc479b342f006203fd1e1941a to < 4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156affected

Linux Linux

Default version status: affected

  • 5.10affected
  • 0 to < 5.10unaffected
  • 5.10.180 to ≤ 5.10.*unaffected
  • 5.15.111 to ≤ 5.15.*unaffected
  • 6.1.28 to ≤ 6.1.*unaffected
  • 6.2.15 to ≤ 6.2.*unaffected
  • 6.3.2 to ≤ 6.3.*unaffected
  • 6.4 to ≤ *unaffected

References