CVE-2025-22033
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
arm64: Don't call NULL in do_compat_alignment_fixup()
do_alignment_t32_to_handler() only fixes up alignment faults for specific instructions; it returns NULL otherwise (e.g. LDREX). When that's the case, signal to the caller that it needs to proceed with the regular alignment fault handling (i.e. SIGBUS). Without this patch, the kernel panics:
Detalles técnicos trazas, registros y código del informe original
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Mem abort info:
ESR = 0x0000000086000006
EC = 0x21: IABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x06: level 2 translation fault
user pgtable: 4k pages, 48-bit VAs, pgdp=00000800164aa000
[0000000000000000] pgd=0800081fdbd22003, p4d=0800081fdbd22003, pud=08000815d51c6003, pmd=0000000000000000
Internal error: Oops: 0000000086000006 [#1] SMP
Modules linked in: cfg80211 rfkill xt_nat xt_tcpudp xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xfrm_user xfrm_algo xt_addrtype nft_compat br_netfilter veth nvme_fa>
libcrc32c crc32c_generic raid0 multipath linear dm_mod dax raid1 md_mod xhci_pci nvme xhci_hcd nvme_core t10_pi usbcore igb crc64_rocksoft crc64 crc_t10dif crct10dif_generic crct10dif_ce crct10dif_common usb_common i2c_algo_bit i2c>
CPU: 2 PID: 3932954 Comm: WPEWebProcess Not tainted 6.1.0-31-arm64 #1 Debian 6.1.128-1
Hardware name: GIGABYTE MP32-AR1-00/MP32-AR1-00, BIOS F18v (SCP: 1.08.20211002) 12/01/2021
pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : 0x0
lr : do_compat_alignment_fixup+0xd8/0x3dc
sp : ffff80000f973dd0
x29: ffff80000f973dd0 x28: ffff081b42526180 x27: 0000000000000000
x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000
x23: 0000000000000004 x22: 0000000000000000 x21: 0000000000000001
x20: 00000000e8551f00 x19: ffff80000f973eb0 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000000000 x9 : ffffaebc949bc488
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000400000 x4 : 0000fffffffffffe x3 : 0000000000000000
x2 : ffff80000f973eb0 x1 : 00000000e8551f00 x0 : 0000000000000001
Call trace:
0x0
do_alignment_fault+0x40/0x50
do_mem_abort+0x4c/0xa0
el0_da+0x48/0xf0
el0t_32_sync_handler+0x110/0x140
el0t_32_sync+0x190/0x194
Code: bad PC value
---[ end trace 0000000000000000 ]---CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.20%
- Percentil entre todas las CVEs puntuadas: 9
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-476
- CWE-476
Referencias
- https://git.kernel.org/stable/c/2df8ee605eb6806cd41c2095306db05206633a08
- https://git.kernel.org/stable/c/617a4b0084a547917669fef2b54253cc9c064990
- https://git.kernel.org/stable/c/c28f31deeacda307acfee2f18c0ad904e5123aac
- https://git.kernel.org/stable/c/cf187601053ecaf671ae645edb898901f81d03e9
- https://git.kernel.org/stable/c/ecf798573bbe0805803f7764e12a34b4bcc65074
- https://git.kernel.org/stable/c/fa2a9f625f185c6acb4ee5be8d71359a567afac9
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
JSON original (NVD)
Mostrar
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: Don't call NULL in do_compat_alignment_fixup()\n\ndo_alignment_t32_to_handler() only fixes up alignment faults for\nspecific instructions; it returns NULL otherwise (e.g. LDREX). When\nthat's the case, signal to the caller that it needs to proceed with the\nregular alignment fault handling (i.e. SIGBUS). Without this patch, the\nkernel panics:\n\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n Mem abort info:\n ESR = 0x0000000086000006\n EC = 0x21: IABT (current EL), IL = 32 bits\n SET = 0, FnV = 0\n EA = 0, S1PTW = 0\n FSC = 0x06: level 2 translation fault\n user pgtable: 4k pages, 48-bit VAs, pgdp=00000800164aa000\n [0000000000000000] pgd=0800081fdbd22003, p4d=0800081fdbd22003, pud=08000815d51c6003, pmd=0000000000000000\n Internal error: Oops: 0000000086000006 [#1] SMP\n Modules linked in: cfg80211 rfkill xt_nat xt_tcpudp xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xfrm_user xfrm_algo xt_addrtype nft_compat br_netfilter veth nvme_fa>\n libcrc32c crc32c_generic raid0 multipath linear dm_mod dax raid1 md_mod xhci_pci nvme xhci_hcd nvme_core t10_pi usbcore igb crc64_rocksoft crc64 crc_t10dif crct10dif_generic crct10dif_ce crct10dif_common usb_common i2c_algo_bit i2c>\n CPU: 2 PID: 3932954 Comm: WPEWebProcess Not tainted 6.1.0-31-arm64 #1 Debian 6.1.128-1\n Hardware name: GIGABYTE MP32-AR1-00/MP32-AR1-00, BIOS F18v (SCP: 1.08.20211002) 12/01/2021\n pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : 0x0\n lr : do_compat_alignment_fixup+0xd8/0x3dc\n sp : ffff80000f973dd0\n x29: ffff80000f973dd0 x28: ffff081b42526180 x27: 0000000000000000\n x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000\n x23: 0000000000000004 x22: 0000000000000000 x21: 0000000000000001\n x20: 00000000e8551f00 x19: ffff80000f973eb0 x18: 0000000000000000\n x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000\n x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000\n x11: 0000000000000000 x10: 0000000000000000 x9 : ffffaebc949bc488\n x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000\n x5 : 0000000000400000 x4 : 0000fffffffffffe x3 : 0000000000000000\n x2 : ffff80000f973eb0 x1 : 00000000e8551f00 x0 : 0000000000000001\n Call trace:\n 0x0\n do_alignment_fault+0x40/0x50\n do_mem_abort+0x4c/0xa0\n el0_da+0x48/0xf0\n el0t_32_sync_handler+0x110/0x140\n el0t_32_sync+0x190/0x194\n Code: bad PC value\n ---[ end trace 0000000000000000 ]---"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: arm64: No llamar a NULL en do_compat_alignment_fixup(). do_alignment_t32_to_handler() solo corrige errores de alineación para instrucciones específicas; devuelve NULL en caso contrario (por ejemplo, LDREX). En ese caso, se indica al emisor que debe continuar con la gestión normal de errores de alineación (por ejemplo, SIGBUS). Sin este parche, el kernel entra en pánico: No se puede gestionar la desreferencia del puntero NULL del kernel en la dirección virtual 0000000000000000 Información de aborto de memoria: ESR = 0x0000000086000006 EC = 0x21: IABT (EL actual), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: error de traducción de nivel 2 usuario pgtable: 4k páginas, VAs de 48 bits, pgdp=00000800164aa000 [000000000000000] pgd=0800081fdbd22003, p4d=0800081fdbd22003, pud=08000815d51c6003, pmd=0000000000000000 Error interno: Ups: 0000000086000006 [#1] Módulos SMP vinculados en: cfg80211 rfkill xt_nat xt_tcpudp xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xfrm_user xfrm_algo xt_addrtype nft_compat br_netfilter veth nvme_fa> libcrc32c crc32c_generic raid0 multipath lineal dm_mod dax raid1 md_mod xhci_pci nvme xhci_hcd nvme_core t10_pi usbcore igb crc64_rocksoft crc64 crc_t10dif crct10dif_generic crct10dif_ce crct10dif_common usb_common i2c_algo_bit i2c> CPU: 2 PID: 3932954 Comm: WPEWebProcess No contaminado 6.1.0-31-arm64 #1 Debian 6.1.128-1 Nombre del hardware: GIGABYTE MP32-AR1-00/MP32-AR1-00, BIOS F18v (SCP: 1.08.20211002) 12/01/2021 pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : 0x0 lr: corregir la alineación de compatibilidad+0xd8/0x3dc sp: ffff80000f973dd0 x29: ffff80000f973dd0 x28: ffff081b42526180 x27: 0000000000000000 x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000004 x22: 0000000000000000 x21: 0000000000000001 x20: 00000000e8551f00 x19: ffff80000f973eb0 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000000 x10: 000000000000000 x9: ffffaebc949bc488 x8: 000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 00000000000400000 x4 : 0000ffffffffffffe x3 : 0000000000000000 x2 : ffff80000f973eb0 x1 : 00000000e8551f00 x0 : 0000000000000001 Rastreo de llamadas: 0x0 do_alignment_fault+0x40/0x50 do_mem_abort+0x4c/0xa0 el0_da+0x48/0xf0 el0t_32_sync_handler+0x110/0x140 el0t_32_sync+0x190/0x194 Código: valor de PC incorrecto ---[ fin de seguimiento 0000000000000000 ]---"
}
],
"lastModified": "2026-06-17T08:44:53.587",
"configurations": [
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