CVE-2023-53702
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: s390/crypto: use vector instructions only if available for ChaCha20 Commit 349d03ffd5f6 ("crypto: s390 - add crypto library interface for ChaCha20") added a library interface to the s390 specific ChaCha20 implementation. However no check was added to verify if the required facilities are installed before branching into the assembler code. If compiled into the kernel, this will lead to the following crash, if vector instructions are not available: data exception: 0007 ilc:3 [#1] SMP Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.3.0-rc7+ #11 Hardware name: IBM 3931 A01 704 (KVM/Linux) Krnl PSW : 0704e00180000000 000000001857277a (chacha20_vx+0x32/0x818) R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3 Krnl GPRS: 0000037f0000000a ffffffffffffff60 000000008184b000 0000000019f5c8e6 0000000000000109 0000037fffb13c58 0000037fffb13c78 0000000019bb1780 0000037fffb13c58 0000000019f5c8e6 000000008184b000 0000000000000109 00000000802d8000 0000000000000109 0000000018571ebc 0000037fffb13718 Krnl Code: 000000001857276a: c07000b1f80b larl %r7,0000000019bb1780 0000000018572770: a708000a lhi %r0,10 #0000000018572774: e78950000c36 vlm %v24,%v25,0(%r5),0 >000000001857277a: e7a060000806 vl %v26,0(%r6),0 0000000018572780: e7bf70004c36 vlm %v27,%v31,0(%r7),4 0000000018572786: e70b00000456 vlr %v0,%v27 000000001857278c: e71800000456 vlr %v1,%v24 0000000018572792: e74b00000456 vlr %v4,%v27 Call Trace: [<000000001857277a>] chacha20_vx+0x32/0x818 Last Breaking-Event-Address: [<0000000018571eb6>] chacha20_crypt_s390.constprop.0+0x6e/0xd8 ---[ end trace 0000000000000000 ]--- Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b Fix this by adding a missing MACHINE_HAS_VX check. [[email protected]: remove duplicates in commit message]
View original CVE JSON
{
"id": "CVE-2023-53702",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-10-22T14:15:44.760",
"lastModified": "2026-10-28T19:10:00.193",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/crypto: use vector instructions only if available for ChaCha20\n\nCommit 349d03ffd5f6 (\"crypto: s390 - add crypto library interface for\nChaCha20\") added a library interface to the s390 specific ChaCha20\nimplementation. However no check was added to verify if the required\nfacilities are installed before branching into the assembler code.\n\nIf compiled into the kernel, this will lead to the following crash,\nif vector instructions are not available:\n\ndata exception: 0007 ilc:3 [#1] SMP\nModules linked in:\nCPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.3.0-rc7+ #11\nHardware name: IBM 3931 A01 704 (KVM/Linux)\nKrnl PSW : 0704e00180000000 000000001857277a (chacha20_vx+0x32/0x818)\n R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3\nKrnl GPRS: 0000037f0000000a ffffffffffffff60 000000008184b000 0000000019f5c8e6\n 0000000000000109 0000037fffb13c58 0000037fffb13c78 0000000019bb1780\n 0000037fffb13c58 0000000019f5c8e6 000000008184b000 0000000000000109\n 00000000802d8000 0000000000000109 0000000018571ebc 0000037fffb13718\nKrnl Code: 000000001857276a: c07000b1f80b larl %r7,0000000019bb1780\n 0000000018572770: a708000a lhi %r0,10\n #0000000018572774: e78950000c36 vlm %v24,%v25,0(%r5),0\n >000000001857277a: e7a060000806 vl %v26,0(%r6),0\n 0000000018572780: e7bf70004c36 vlm %v27,%v31,0(%r7),4\n 0000000018572786: e70b00000456 vlr %v0,%v27\n 000000001857278c: e71800000456 vlr %v1,%v24\n 0000000018572792: e74b00000456 vlr %v4,%v27\nCall Trace:\n [<000000001857277a>] chacha20_vx+0x32/0x818\nLast Breaking-Event-Address:\n [<0000000018571eb6>] chacha20_crypt_s390.constprop.0+0x6e/0xd8\n---[ end trace 0000000000000000 ]---\nKernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b\n\nFix this by adding a missing MACHINE_HAS_VX check.\n\n[[email protected]: remove duplicates in commit message]"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ns390/crypto: usar instrucciones vectoriales solo si están disponibles para ChaCha20\n\nEl commit 349d03ffd5f6 (’crypto: s390 - añadir interfaz de biblioteca criptográfica para ChaCha20’) añadió una interfaz de biblioteca a la implementación de ChaCha20 específica de s390. Sin embargo, no se añadió ninguna comprobación para verificar si las funcionalidades requeridas están instaladas antes de bifurcarse al código ensamblador.\n\nSi se compila en el kernel, esto provocará el siguiente fallo, si las instrucciones vectoriales no están disponibles:\n\ndata exception: 0007 ilc:3 [#1] SMP\nModules linked in:\nCPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.3.0-rc7+ #11\nHardware name: IBM 3931 A01 704 (KVM/Linux)\nKrnl PSW : 0704e00180000000 000000001857277a (chacha20_vx+0x32/0x818)\n R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3\nKrnl GPRS: 0000037f0000000a ffffffffffffff60 000000008184b000 0000000019f5c8e6\n 0000000000000109 0000037fffb13c58 0000037fffb13c78 0000000019bb1780\n 0000037fffb13c58 0000000019f5c8e6 000000008184b000 0000000000000109\n 00000000802d8000 0000000000000109 0000000018571ebc 0000037fffb13718\nKrnl Code: 000000001857276a: c07000b1f80b larl %r7,0000000019bb1780\n 0000000018572770: a708000a lhi %r0,10\n #0000000018572774: e78950000c36 vlm %v24,%v25,0(%r5),0\n >000000001857277a: e7a060000806 vl %v26,0(%r6),0\n 0000000018572780: e7bf70004c36 vlm %v27,%v31,0(%r7),4\n 0000000018572786: e70b00000456 vlr %v0,%v27\n 000000001857278c: e71800000456 vlr %v1,%v24\n 0000000018572792: e74b00000456 vlr %v4,%v27\nCall Trace:\n [[000000001857277a]] chacha20_vx+0x32/0x818\nLast Breaking-Event-Address:\n [[0000000018571eb6]] chacha20_crypt_s390.constprop.0+0x6e/0xd8\n---[ end trace 0000000000000000 ]---\nKernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b\n\nEsto se soluciona añadiendo una comprobación MACHINE_HAS_VX faltante.\n\n[[email protected]: eliminar duplicados en el mensaje del commit]"
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"arch/s390/crypto/chacha-glue.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "349d03ffd5f62c298fd667ffa397c3fdc5c6194b",
"lessThan": "25e8d30507aa2f251152df1af7809e85b5538f4a",
"versionType": "git",
"status": "affected"
},
{
"version": "349d03ffd5f62c298fd667ffa397c3fdc5c6194b",
"lessThan": "debb7797bba0caffdbdadc3e7968bb2c414f50da",
"versionType": "git",
"status": "affected"
},
{
"version": "349d03ffd5f62c298fd667ffa397c3fdc5c6194b",
"lessThan": "8703dd6b238da0ec6c276e53836f8200983d3d9b",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"arch/s390/crypto/chacha-glue.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5.19",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.19",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.30",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.3.4",
"lessThanOrEqual": "6.3.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.4",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/25e8d30507aa2f251152df1af7809e85b5538f4a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8703dd6b238da0ec6c276e53836f8200983d3d9b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/debb7797bba0caffdbdadc3e7968bb2c414f50da",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}