CVE-2023-53474
published 2025-10-01CVE-2023-53474: 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)…
PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.15%
5.0th percentile
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
17 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.37-1 (bookworm) | linux 6.1.37-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= a0bc32b3cacf194dc479b342f006203fd1e1941a < a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83 | a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83 |
| linux | linux | >= a0bc32b3cacf194dc479b342f006203fd1e1941a < 11c58a0c1937c157dbdf82d5ab634d68c99f3098 | 11c58a0c1937c157dbdf82d5ab634d68c99f3098 |
| linux | linux | >= a0bc32b3cacf194dc479b342f006203fd1e1941a < ba8ffb1251eb629c2ec35220e3896cf4f7b888a7 | ba8ffb1251eb629c2ec35220e3896cf4f7b888a7 |
| linux | linux | >= a0bc32b3cacf194dc479b342f006203fd1e1941a < 9669fa17287c3af2bbd4868d4c8fdd9e57f8332e | 9669fa17287c3af2bbd4868d4c8fdd9e57f8332e |
| linux | linux | >= a0bc32b3cacf194dc479b342f006203fd1e1941a < 67bb7521b6420d81dab7538c0686f18f7d6d09f4 | 67bb7521b6420d81dab7538c0686f18f7d6d09f4 |
| linux | linux | >= a0bc32b3cacf194dc479b342f006203fd1e1941a < 4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156 | 4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156 |
| linux | linux_kernel | >= 0 < 5.10.191-1 | 5.10.191-1 |
| linux | linux_kernel | >= 0 < 6.1.37-1 | 6.1.37-1 |
| linux | linux_kernel | >= 0 < 6.3.7-1 | 6.3.7-1 |
| linux | linux_kernel | >= 0 < 6.3.7-1 | 6.3.7-1 |
| linux | linux_kernel | >= 5.10 < 5.10.180 | 5.10.180 |
| linux | linux_kernel | >= 5.11 < 5.15.111 | 5.15.111 |
| linux | linux_kernel | >= 5.16 < 6.1.28 | 6.1.28 |
| linux | linux_kernel | >= 6.2 < 6.2.15 | 6.2.15 |
| linux | linux_kernel | >= 6.3 < 6.3.2 | 6.3.2 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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GHSA
GHSA-hv7j-2x22-hrmc: 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
ghsa_unreviewed·2025-10-01
CVE-2023-53474 [MEDIUM] CWE-190 GHSA-hv7j-2x22-hrmc: 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
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. ]
OSV
CVE-2023-53474: 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_N
osv·2025-10-01·CVSS 5.5
CVE-2023-53474 [MEDIUM] CVE-2023-53474: 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_N
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. ]
Red Hat
kernel: x86/MCE/AMD: Use an u64 for bank_map
vendor_redhat·2025-10-01·CVSS 5.5
CVE-2023-53474 [MEDIUM] CWE-190 kernel: x86/MCE/AMD: Use an u64 for bank_map
kernel: x86/MCE/AMD: Use an u64 for bank_map
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. ]
Statement: The patch fixes an out-of-bounds bit shift / incorrect bitmask width in
Debian
CVE-2023-53474: linux - In the Linux kernel, the following vulnerability has been resolved: x86/MCE/AMD...
vendor_debian·2023·CVSS 5.5
CVE-2023-53474 [MEDIUM] CVE-2023-53474: linux - In the Linux kernel, the following vulnerability has been resolved: x86/MCE/AMD...
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. ]
Scope: local
bookworm: resolved (fixed in 6.1.37-1)
bullseye: resolved (fixed in 5.10.191-1)
forky: resolved (fixed in 6.3.7-1)
s
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/11c58a0c1937c157dbdf82d5ab634d68c99f3098https://git.kernel.org/stable/c/4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156https://git.kernel.org/stable/c/67bb7521b6420d81dab7538c0686f18f7d6d09f4https://git.kernel.org/stable/c/9669fa17287c3af2bbd4868d4c8fdd9e57f8332ehttps://git.kernel.org/stable/c/a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83https://git.kernel.org/stable/c/ba8ffb1251eb629c2ec35220e3896cf4f7b888a7
2025-10-01
Published