Answer in brief
CVE-2023-53474 records a High severity (CVSS 7.8) vulnerability in x86/MCE/AMD: Use an u64 for bank_map. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a0bc32b3cacf194dc479b342f006203fd1e1941a <a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83 || >=a0bc32b3cacf194dc479b342f006203fd1e1941a <11c58a0c1937c157dbdf82d5ab634d68c99f3098 || >=a0bc32b3cacf194dc479b342f006203fd1e1941a <ba8ffb1251eb629c2ec35220e3896cf4f7b888a7 || >=a0bc32b3cacf194dc479b342f006203fd1e1941a <9669fa17287c3af2bbd4868d4c8fdd9e57f8332e || >=a0bc32b3cacf194dc479b342f006203fd1e1941a <67bb7521b6420d81dab7538c0686f18f7d6d09f4 || >=a0bc32b3cacf194dc479b342f006203fd1e1941a <4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156 | a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83, 11c58a0c1937c157dbdf82d5ab634d68c99f3098, ba8ffb1251eb629c2ec35220e3896cf4f7b888a7, 9669fa17287c3af2bbd4868d4c8fdd9e57f8332e, 67bb7521b6420d81dab7538c0686f18f7d6d09f4, 4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156 |
| Linux/Linuxgeneric | 5.10 | Not reported |
Published upstream
Oct 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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. ]
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2023-53474 records a High severity (CVSS 7.8) vulnerability in x86/MCE/AMD: Use an u64 for bank_map. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a0bc32b3cacf194dc479b342f006203fd1e1941a <a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83 || >=a0bc32b3cacf194dc479b342f006203fd1e1941a <11c58a0c1937c157dbdf82d5ab634d68c99f3098 || >=a0bc32b3cacf194dc479b342f006203fd1e1941a <ba8ffb1251eb629c2ec35220e3896cf4f7b888a7 || >=a0bc32b3cacf194dc479b342f006203fd1e1941a <9669fa17287c3af2bbd4868d4c8fdd9e57f8332e || >=a0bc32b3cacf194dc479b342f006203fd1e1941a <67bb7521b6420d81dab7538c0686f18f7d6d09f4 || >=a0bc32b3cacf194dc479b342f006203fd1e1941a <4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156 | a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83, 11c58a0c1937c157dbdf82d5ab634d68c99f3098, ba8ffb1251eb629c2ec35220e3896cf4f7b888a7, 9669fa17287c3af2bbd4868d4c8fdd9e57f8332e, 67bb7521b6420d81dab7538c0686f18f7d6d09f4, 4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156 |
| Linux/Linuxgeneric | 5.10 | Not reported |
Published upstream
Oct 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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. ]
Quoted source text, attributed separately from HOL analysis.