Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a0bc32b3cacf194dc479b342f006203fd1e1941a before a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83; affected a0bc32b3cacf194dc479b342f006203fd1e1941a before 11c58a0c1937c157dbdf82d5ab634d68c99f3098; affected a0bc32b3cacf194dc479b342f006203fd1e1941a before ba8ffb1251eb629c2ec35220e3896cf4f7b888a7; affected a0bc32b3cacf194dc479b342f006203fd1e1941a before 9669fa17287c3af2bbd4868d4c8fdd9e57f8332e; affected a0bc32b3cacf194dc479b342f006203fd1e1941a before 67bb7521b6420d81dab7538c0686f18f7d6d09f4; affected a0bc32b3cacf194dc479b342f006203fd1e1941a before 4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156 |
| Linux / Linux | affected 5.10; unaffected 0 before 5.10; unaffected 5.10.180 through 5.10.*; unaffected 5.15.111 through 5.15.*; unaffected 6.1.28 through 6.1.*; unaffected 6.2.15 through 6.2.*; unaffected 6.3.2 through 6.3.*; unaffected 6.4 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83
- https://git.kernel.org/stable/c/11c58a0c1937c157dbdf82d5ab634d68c99f3098
- https://git.kernel.org/stable/c/ba8ffb1251eb629c2ec35220e3896cf4f7b888a7
- https://git.kernel.org/stable/c/9669fa17287c3af2bbd4868d4c8fdd9e57f8332e
- https://git.kernel.org/stable/c/67bb7521b6420d81dab7538c0686f18f7d6d09f4
- https://git.kernel.org/stable/c/4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156
ADP enrichment
No English description supplied.
No references supplied.