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nvd-json-data-feeds/CVE-2024/CVE-2024-267xx/CVE-2024-26796.json
cad-safe-bot 7ab230f046 Auto-Update: 2025-03-16T03:00:19.723046+00:00
2025-03-16 03:03:50 +00:00

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{
"id": "CVE-2024-26796",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2024-04-04T09:15:08.790",
"lastModified": "2025-02-27T14:42:59.307",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: perf: ctr_get_width function for legacy is not defined\n\nWith parameters CONFIG_RISCV_PMU_LEGACY=y and CONFIG_RISCV_PMU_SBI=n\nlinux kernel crashes when you try perf record:\n\n$ perf record ls\n[ 46.749286] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n[ 46.750199] Oops [#1]\n[ 46.750342] Modules linked in:\n[ 46.750608] CPU: 0 PID: 107 Comm: perf-exec Not tainted 6.6.0 #2\n[ 46.750906] Hardware name: riscv-virtio,qemu (DT)\n[ 46.751184] epc : 0x0\n[ 46.751430] ra : arch_perf_update_userpage+0x54/0x13e\n[ 46.751680] epc : 0000000000000000 ra : ffffffff8072ee52 sp : ff2000000022b8f0\n[ 46.751958] gp : ffffffff81505988 tp : ff6000000290d400 t0 : ff2000000022b9c0\n[ 46.752229] t1 : 0000000000000001 t2 : 0000000000000003 s0 : ff2000000022b930\n[ 46.752451] s1 : ff600000028fb000 a0 : 0000000000000000 a1 : ff600000028fb000\n[ 46.752673] a2 : 0000000ae2751268 a3 : 00000000004fb708 a4 : 0000000000000004\n[ 46.752895] a5 : 0000000000000000 a6 : 000000000017ffe3 a7 : 00000000000000d2\n[ 46.753117] s2 : ff600000028fb000 s3 : 0000000ae2751268 s4 : 0000000000000000\n[ 46.753338] s5 : ffffffff8153e290 s6 : ff600000863b9000 s7 : ff60000002961078\n[ 46.753562] s8 : ff60000002961048 s9 : ff60000002961058 s10: 0000000000000001\n[ 46.753783] s11: 0000000000000018 t3 : ffffffffffffffff t4 : ffffffffffffffff\n[ 46.754005] t5 : ff6000000292270c t6 : ff2000000022bb30\n[ 46.754179] status: 0000000200000100 badaddr: 0000000000000000 cause: 000000000000000c\n[ 46.754653] Code: Unable to access instruction at 0xffffffffffffffec.\n[ 46.754939] ---[ end trace 0000000000000000 ]---\n[ 46.755131] note: perf-exec[107] exited with irqs disabled\n[ 46.755546] note: perf-exec[107] exited with preempt_count 4\n\nThis happens because in the legacy case the ctr_get_width function was not\ndefined, but it is used in arch_perf_update_userpage.\n\nAlso remove extra check in riscv_pmu_ctr_get_width_mask"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: controladores: perf: ctr_get_width la funci\u00f3n para legado no est\u00e1 definida Con los par\u00e1metros CONFIG_RISCV_PMU_LEGACY=y y CONFIG_RISCV_PMU_SBI=n el kernel de Linux falla cuando intenta el registro de rendimiento: $ perf record ls [ 46.749286] No se puede manejar la desreferencia del puntero NULL del kernel en la direcci\u00f3n virtual 0000000000000000 [ 46.750199] Ups [#1] [ 46.750342] M\u00f3dulos vinculados en: [ 46.750608] CPU: 0 PID: 107 Comm: perf-exec Not tainted 6.6.0 #2 [ 46.750906] Nombre del hardware : riscv-virtio,qemu (DT) [ 46.751184] epc : 0x0 [ 46.751430 ] ra : arch_perf_update_userpage+0x54/0x13e [ 46.751680] epc : 00000000000000000 ra : ffffffff8072ee52 sp : ff20000 00022b8f0 [46.751958] gp: ffffffff81505988 tp: ff6000000290d400 t0: ff2000000022b9c0 [ 46.752229] t1 : 0000000000000001 t2 : 0000000000000003 s0 : ff2000000022b930 [ 46.752451] s1 : ff600000028fb000 a0 : 0000000000000000 a 1: ff600000028fb000 [46.752673] a2: 0000000ae2751268 a3: 00000000004fb708 a4: 00000000000000004 [46.752895] a5: 0000000000000000 a6: 000000000017ffe3 a7: 00000000000000d2 [46.753117] s2: ff600000028fb000 s3: 0000000ae2751268 s4: 0000000000000000 [46.753338] s5: ffffffff8153e290 s6: ff600000863b9000 s7: ff60000002 961078 [46.753562] s8: ff60000002961048 s9: ff60000002961058 s10: 00000000000000001 [46.753783] s11: 0000000000000018 t3: ffffffffffffff ff t4 : ffffffffffffffff [ 46.754005] t5 : ff6000000292270c t6: ff2000000022bb30 [46.754179] estado: 0000000200000100 badaddr: 00000000000000000 causa: 0000000000000000c [46.754653] C\u00f3digo: No se puede acceder instrucci\u00f3n en 0xffffffffffffffec. [ 46.754939] ---[ end trace 0000000000000000 ]--- [ 46.755131] nota: perf-exec[107] sali\u00f3 con irqs deshabilitados [ 46.755546] nota: perf-exec[107] sali\u00f3 con preempt_count 4 Esto sucede porque en el legado En este caso, la funci\u00f3n ctr_get_width no se defini\u00f3, pero se usa en arch_perf_update_userpage. Tambi\u00e9n elimine el control adicional en riscv_pmu_ctr_get_width_mask"
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "nvd@nist.gov",
"type": "Primary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6
}
]
},
"weaknesses": [
{
"source": "nvd@nist.gov",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-476"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.6",
"versionEndExcluding": "6.6.21",
"matchCriteriaId": "084897EF-9F0A-4459-ADD9-E47D969EF093"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.7",
"versionEndExcluding": "6.7.9",
"matchCriteriaId": "1C538467-EDA0-4A9A-82EB-2925DE9FF827"
},
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"matchCriteriaId": "B9F4EA73-0894-400F-A490-3A397AB7A517"
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"matchCriteriaId": "056BD938-0A27-4569-B391-30578B309EE3"
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"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*",
"matchCriteriaId": "F02056A5-B362-4370-9FF8-6F0BD384D520"
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"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*",
"matchCriteriaId": "62075ACE-B2A0-4B16-829D-B3DA5AE5CC41"
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"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:*",
"matchCriteriaId": "A780F817-2A77-4130-A9B7-5C25606314E3"
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"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:*",
"matchCriteriaId": "AEB9199B-AB8F-4877-8964-E2BA95B5F15C"
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],
"references": [
{
"url": "https://git.kernel.org/stable/c/682dc133f83e0194796e6ea72eb642df1c03dfbe",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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]
}
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