CVE-2024-26947
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: ARM: 9359/1: flush: check if the folio is reserved for no-mapping addresses Since commit a4d5613c4dc6 ("arm: extend pfn_valid to take into account freed memory map alignment") changes the semantics of pfn_valid() to check presence of the memory map for a PFN. A valid page for an address which is reserved but not mapped by the kernel[1], the system crashed during some uio test with the following memory layout: node 0: [mem 0x00000000c0a00000-0x00000000cc8fffff] node 0: [mem 0x00000000d0000000-0x00000000da1fffff] the uio layout is：0xc0900000, 0x100000 the crash backtrace like: Unable to handle kernel paging request at virtual address bff00000 [...] CPU: 1 PID: 465 Comm: startapp.bin Tainted: G O 5.10.0 #1 Hardware name: Generic DT based system PC is at b15_flush_kern_dcache_area+0x24/0x3c LR is at __sync_icache_dcache+0x6c/0x98 [...] (b15_flush_kern_dcache_area) from (__sync_icache_dcache+0x6c/0x98) (__sync_icache_dcache) from (set_pte_at+0x28/0x54) (set_pte_at) from (remap_pfn_range+0x1a0/0x274) (remap_pfn_range) from (uio_mmap+0x184/0x1b8 [uio]) (uio_mmap [uio]) from (__mmap_region+0x264/0x5f4) (__mmap_region) from (__do_mmap_mm+0x3ec/0x440) (__do_mmap_mm) from (do_mmap+0x50/0x58) (do_mmap) from (vm_mmap_pgoff+0xfc/0x188) (vm_mmap_pgoff) from (ksys_mmap_pgoff+0xac/0xc4) (ksys_mmap_pgoff) from (ret_fast_syscall+0x0/0x5c) Code: e0801001 e2423001 e1c00003 f57ff04f (ee070f3e) ---[ end trace 09cf0734c3805d52 ]--- Kernel panic - not syncing: Fatal exception So check if PG_reserved was set to solve this issue. [1]: https://lore.kernel.org/lkml/[email protected]/
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2024-05-01 06:15:10.607000
Last modified
2026-10-30 13:17:23.860000
View original CVE JSON
{
"id": "CVE-2024-26947",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2024-05-01T06:15:10.607",
"lastModified": "2026-10-30T13:17:23.860",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nARM: 9359/1: flush: check if the folio is reserved for no-mapping addresses\n\nSince commit a4d5613c4dc6 (\"arm: extend pfn_valid to take into account\nfreed memory map alignment\") changes the semantics of pfn_valid() to check\npresence of the memory map for a PFN. A valid page for an address which\nis reserved but not mapped by the kernel[1], the system crashed during\nsome uio test with the following memory layout:\n\n node 0: [mem 0x00000000c0a00000-0x00000000cc8fffff]\n node 0: [mem 0x00000000d0000000-0x00000000da1fffff]\n the uio layout is：0xc0900000, 0x100000\n\nthe crash backtrace like:\n\n Unable to handle kernel paging request at virtual address bff00000\n [...]\n CPU: 1 PID: 465 Comm: startapp.bin Tainted: G O 5.10.0 #1\n Hardware name: Generic DT based system\n PC is at b15_flush_kern_dcache_area+0x24/0x3c\n LR is at __sync_icache_dcache+0x6c/0x98\n [...]\n (b15_flush_kern_dcache_area) from (__sync_icache_dcache+0x6c/0x98)\n (__sync_icache_dcache) from (set_pte_at+0x28/0x54)\n (set_pte_at) from (remap_pfn_range+0x1a0/0x274)\n (remap_pfn_range) from (uio_mmap+0x184/0x1b8 [uio])\n (uio_mmap [uio]) from (__mmap_region+0x264/0x5f4)\n (__mmap_region) from (__do_mmap_mm+0x3ec/0x440)\n (__do_mmap_mm) from (do_mmap+0x50/0x58)\n (do_mmap) from (vm_mmap_pgoff+0xfc/0x188)\n (vm_mmap_pgoff) from (ksys_mmap_pgoff+0xac/0xc4)\n (ksys_mmap_pgoff) from (ret_fast_syscall+0x0/0x5c)\n Code: e0801001 e2423001 e1c00003 f57ff04f (ee070f3e)\n ---[ end trace 09cf0734c3805d52 ]---\n Kernel panic - not syncing: Fatal exception\n\nSo check if PG_reserved was set to solve this issue.\n\n[1]: https://lore.kernel.org/lkml/[email protected]/"
},
{
"lang": "es",
"value": "En el kernel de Linux, se resolvió la siguiente vulnerabilidad: ARM: 9359/1: descarga: verifique si la publicación está reservada para direcciones sin asignación. Desde el commit a4d5613c4dc6 (\"arm: extienda pfn_valid para tener en cuenta la alineación del mapa de memoria liberada\") cambia la semántica de pfn_valid() para verificar la presencia del mapa de memoria para un PFN. A valid page for an address which is reserved but not mapped by the kernel[1], the system crashed during some uio test with the following memory layout: node 0: [mem 0x00000000c0a00000-0x00000000cc8fffff] node 0: [mem 0x00000000d0000000-0x00000000da1fffff] el diseño de uio es? 0xc0900000, 0x100000 el seguimiento del fallo es como: No se puede manejar la solicitud de paginación del kernel en la dirección virtual bff00000 [...] CPU: 1 PID: 465 Comm: startapp.bin Contaminado: GO 5.10.0 #1 Nombre del hardware: La PC del sistema basado en DT genérico está en b15_flush_kern_dcache_area+0x24/0x3c LR está en __sync_icache_dcache+0x6c/0x98 [...] (b15_flush_kern_dcache_area) de (__sync_icache_dcache+0x6c/0x98) (__sync_icache_dcache) de (set_pte_at+0x2 8/0x54) (set_pte_at) desde (remap_pfn_range+0x1a0/0x274) (remap_pfn_range) desde (uio_mmap+0x184/0x1b8 [uio]) (uio_mmap [uio]) desde (__mmap_region+0x264/0x5f4) (__mmap_region) desde (__do_mmap_mm+0x3ec/0x440) milímetros) de (do_mmap+0x50/0x58) (do_mmap) de (vm_mmap_pgoff+0xfc/0x188) (vm_mmap_pgoff) de (ksys_mmap_pgoff+0xac/0xc4) (ksys_mmap_pgoff) de (ret_fast_syscall+0x0/0x5c) Código: e0801001 423001 e1c00003 f57ff04f (ee070f3e) ---[ end trace 09cf0734c3805d52 ]--- Pánico del kernel - no se sincroniza: excepción fatal. Así que verifique si PG_reserved estaba configurado para resolver este problema. [1]: https://lore.kernel.org/lkml/[email protected]/"
}
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"metrics": {
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{
"source": "[email protected]",
"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"
},
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"impactScore": 3.6
}
],
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{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2024-06-17T17:40:49.744241Z",
"id": "CVE-2024-26947",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
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