CVE-2026-46254
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: AppArmor: Allow apparmor to handle unaligned dfa tables The dfa tables can originate from kernel or userspace and 8-byte alignment isn't always guaranteed and as such may trigger unaligned memory accesses on various architectures. Resulting in the following [ 73.901376] WARNING: CPU: 0 PID: 341 at security/apparmor/match.c:316 aa_dfa_unpack+0x6cc/0x720 [ 74.015867] Modules linked in: binfmt_misc evdev flash sg drm drm_panel_orientation_quirks backlight i2c_core configfs nfnetlink autofs4 ext4 crc16 mbcache jbd2 hid_generic usbhid sr_mod hid cdrom sd_mod ata_generic ohci_pci ehci_pci ehci_hcd ohci_hcd pata_ali libata sym53c8xx scsi_transport_spi tg3 scsi_mod usbcore libphy scsi_common mdio_bus usb_common [ 74.428977] CPU: 0 UID: 0 PID: 341 Comm: apparmor_parser Not tainted 6.18.0-rc6+ #9 NONE [ 74.536543] Call Trace: [ 74.568561] [<0000000000434c24>] dump_stack+0x8/0x18 [ 74.633757] [<0000000000476438>] __warn+0xd8/0x100 [ 74.696664] [<00000000004296d4>] warn_slowpath_fmt+0x34/0x74 [ 74.771006] [<00000000008db28c>] aa_dfa_unpack+0x6cc/0x720 [ 74.843062] [<00000000008e643c>] unpack_pdb+0xbc/0x7e0 [ 74.910545] [<00000000008e7740>] unpack_profile+0xbe0/0x1300 [ 74.984888] [<00000000008e82e0>] aa_unpack+0xe0/0x6a0 [ 75.051226] [<00000000008e3ec4>] aa_replace_profiles+0x64/0x1160 [ 75.130144] [<00000000008d4d90>] policy_update+0xf0/0x280 [ 75.201057] [<00000000008d4fc8>] profile_replace+0xa8/0x100 [ 75.274258] [<0000000000766bd0>] vfs_write+0x90/0x420 [ 75.340594] [<00000000007670cc>] ksys_write+0x4c/0xe0 [ 75.406932] [<0000000000767174>] sys_write+0x14/0x40 [ 75.472126] [<0000000000406174>] linux_sparc_syscall+0x34/0x44 [ 75.548802] ---[ end trace 0000000000000000 ]--- [ 75.609503] dfa blob stream 0xfff0000008926b96 not aligned. [ 75.682695] Kernel unaligned access at TPC[8db2a8] aa_dfa_unpack+0x6e8/0x720 Work around it by using the get_unaligned_xx() helpers.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-06-03 18:16:26.323000
Last modified
2026-10-30 13:19:00.450000
View original CVE JSON
{
"id": "CVE-2026-46254",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-06-03T18:16:26.323",
"lastModified": "2026-10-30T13:19:00.450",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nAppArmor: Allow apparmor to handle unaligned dfa tables\n\nThe dfa tables can originate from kernel or userspace and 8-byte alignment\nisn't always guaranteed and as such may trigger unaligned memory accesses\non various architectures. Resulting in the following\n\n[ 73.901376] WARNING: CPU: 0 PID: 341 at security/apparmor/match.c:316 aa_dfa_unpack+0x6cc/0x720\n[ 74.015867] Modules linked in: binfmt_misc evdev flash sg drm drm_panel_orientation_quirks backlight i2c_core configfs nfnetlink autofs4 ext4 crc16 mbcache jbd2 hid_generic usbhid sr_mod hid cdrom\nsd_mod ata_generic ohci_pci ehci_pci ehci_hcd ohci_hcd pata_ali libata sym53c8xx scsi_transport_spi tg3 scsi_mod usbcore libphy scsi_common mdio_bus usb_common\n[ 74.428977] CPU: 0 UID: 0 PID: 341 Comm: apparmor_parser Not tainted 6.18.0-rc6+ #9 NONE\n[ 74.536543] Call Trace:\n[ 74.568561] [<0000000000434c24>] dump_stack+0x8/0x18\n[ 74.633757] [<0000000000476438>] __warn+0xd8/0x100\n[ 74.696664] [<00000000004296d4>] warn_slowpath_fmt+0x34/0x74\n[ 74.771006] [<00000000008db28c>] aa_dfa_unpack+0x6cc/0x720\n[ 74.843062] [<00000000008e643c>] unpack_pdb+0xbc/0x7e0\n[ 74.910545] [<00000000008e7740>] unpack_profile+0xbe0/0x1300\n[ 74.984888] [<00000000008e82e0>] aa_unpack+0xe0/0x6a0\n[ 75.051226] [<00000000008e3ec4>] aa_replace_profiles+0x64/0x1160\n[ 75.130144] [<00000000008d4d90>] policy_update+0xf0/0x280\n[ 75.201057] [<00000000008d4fc8>] profile_replace+0xa8/0x100\n[ 75.274258] [<0000000000766bd0>] vfs_write+0x90/0x420\n[ 75.340594] [<00000000007670cc>] ksys_write+0x4c/0xe0\n[ 75.406932] [<0000000000767174>] sys_write+0x14/0x40\n[ 75.472126] [<0000000000406174>] linux_sparc_syscall+0x34/0x44\n[ 75.548802] ---[ end trace 0000000000000000 ]---\n[ 75.609503] dfa blob stream 0xfff0000008926b96 not aligned.\n[ 75.682695] Kernel unaligned access at TPC[8db2a8] aa_dfa_unpack+0x6e8/0x720\n\nWork around it by using the get_unaligned_xx() helpers."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nAppArmor: Permitir que apparmor maneje tablas dfa no alineadas\n\nLas tablas dfa pueden originarse desde el kernel o el espacio de usuario y la alineación de 8 bytes no siempre está garantizada y como tal puede desencadenar accesos a memoria no alineados en varias arquitecturas. Resultando en lo siguiente\n\n[ 73.901376] WARNING: CPU: 0 PID: 341 at security/apparmor/match.c:316 aa_dfa_unpack+0x6cc/0x720\n[ 74.015867] Modules linked in: binfmt_misc evdev flash sg drm drm_panel_orientation_quirks backlight i2c_core configfs nfnetlink autofs4 ext4 crc16 mbcache jbd2 hid_generic usbhid sr_mod hid cdrom\nsd_mod ata_generic ohci_pci ehci_pci ehci_hcd ohci_hcd pata_ali libata sym53c8xx scsi_transport_spi tg3 scsi_mod usbcore libphy scsi_common mdio_bus usb_common\n[ 74.428977] CPU: 0 UID: 0 PID: 341 Comm: apparmor_parser Not tainted 6.18.0-rc6+ #9 NONE\n[ 74.536543] Call Trace:\n[ 74.568561] [<0000000000434c24>] dump_stack+0x8/0x18\n[ 74.633757] [<0000000000476438>] __warn+0xd8/0x100\n[ 74.696664] [<00000000004296d4>] warn_slowpath_fmt+0x34/0x74\n[ 74.771006] [<00000000008db28c>] aa_dfa_unpack+0x6cc/0x720\n[ 74.843062] [<00000000008e643c>] unpack_pdb+0xbc/0x7e0\n[ 74.910545] [<00000000008e7740>] unpack_profile+0xbe0/0x1300\n[ 74.984888] [<00000000008e82e0>] aa_unpack+0xe0/0x6a0\n[ 75.051226] [<00000000008e3ec4>] aa_replace_profiles+0x64/0x1160\n[ 75.130144] [<00000000008d4d90>] policy_update+0xf0/0x280\n[ 75.201057] [<00000000008d4fc8>] profile_replace+0xa8/0x100\n[ 75.274258] [<0000000000766bd0>] vfs_write+0x90/0x420\n[ 75.340594] [<00000000007670cc>] ksys_write+0x4c/0xe0\n[ 75.406932] [<0000000000767174>] sys_write+0x14/0x40\n[ 75.472126] [<0000000000406174>] linux_sparc_syscall+0x34/0x44\n[ 75.548802] ---[ end trace 0000000000000000 ]---\n[ 75.609503] dfa blob stream 0xfff0000008926b96 not aligned.\n[ 75.682695] Kernel unaligned access at TPC[8db2a8] aa_dfa_unpack+0x6e8/0x720\n\nSolucionarlo utilizando las funciones auxiliares get_unaligned_xx()."
}
],
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{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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],
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},
{
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"versionType": "semver",
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},
{
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"lessThanOrEqual": "6.1.*",
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},
{
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"lessThanOrEqual": "6.6.*",
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},
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},
{
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"lessThanOrEqual": "6.18.*",
"versionType": "semver",
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},
{
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"lessThanOrEqual": "6.19.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.0",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"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"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"configurations": [
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