CVE-2026-45965
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
apparmor: fix invalid deref of rawdata when export_binary is unset
If the export_binary parameter is disabled on runtime, profiles that were loaded before that will still have their rawdata stored in apparmorfs, with a symbolic link to the rawdata on the policy directory. When one of those profiles are replaced, the rawdata is set to NULL, but when trying to resolve the symbolic links to rawdata for that profile, it will try to dereference profile->rawdata->name when profile->rawdata is now NULL causing an oops. Fix it by checking if rawdata is set.
Detalles técnicos trazas, registros y código del informe original
[ 168.653080] BUG: kernel NULL pointer dereference, address: 0000000000000088 [ 168.657420] #PF: supervisor read access in kernel mode [ 168.660619] #PF: error_code(0x0000) - not-present page [ 168.663613] PGD 0 P4D 0 [ 168.665450] Oops: Oops: 0000 [#1] SMP NOPTI [ 168.667836] CPU: 1 UID: 0 PID: 1729 Comm: ls Not tainted 6.19.0-rc7+ #3 PREEMPT(voluntary) [ 168.672308] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 168.679327] RIP: 0010:rawdata_get_link_base.isra.0+0x23/0x330 [ 168.682768] Code: 90 90 90 90 90 90 90 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 89 55 d0 48 85 ff 0f 84 e3 01 00 00 <48> 83 3c 25 88 00 00 00 00 0f 84 d4 01 00 00 49 89 f6 49 89 cc e8 [ 168.689818] RSP: 0018:ffffcdcb8200fb80 EFLAGS: 00010282 [ 168.690871] RAX: ffffffffaee74ec0 RBX: 0000000000000000 RCX: ffffffffb0120158 [ 168.692251] RDX: ffffcdcb8200fbe0 RSI: ffff88c187c9fa80 RDI: ffff88c186c98a80 [ 168.693593] RBP: ffffcdcb8200fbc0 R08: 0000000000000000 R09: 0000000000000000 [ 168.694941] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88c186c98a80 [ 168.696289] R13: 00007fff005aaa20 R14: 0000000000000080 R15: ffff88c188f4fce0 [ 168.697637] FS: 0000790e81c58280(0000) GS:ffff88c20a957000(0000) knlGS:0000000000000000 [ 168.699227] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 168.700349] CR2: 0000000000000088 CR3: 000000012fd3e000 CR4: 0000000000350ef0 [ 168.701696] Call Trace: [ 168.702325] <TASK> [ 168.702995] rawdata_get_link_data+0x1c/0x30 [ 168.704145] vfs_readlink+0xd4/0x160 [ 168.705152] do_readlinkat+0x114/0x180 [ 168.706214] __x64_sys_readlink+0x1e/0x30 [ 168.708653] x64_sys_call+0x1d77/0x26b0 [ 168.709525] do_syscall_64+0x81/0x500 [ 168.710348] ? do_statx+0x72/0xb0 [ 168.711109] ? putname+0x3e/0x80 [ 168.711845] ? __x64_sys_statx+0xb7/0x100 [ 168.712711] ? x64_sys_call+0x10fc/0x26b0 [ 168.713577] ? do_syscall_64+0xbf/0x500 [ 168.714412] ? do_user_addr_fault+0x1d2/0x8d0 [ 168.715404] ? irqentry_exit+0xb2/0x740 [ 168.716359] ? exc_page_fault+0x90/0x1b0 [ 168.717307] entry_SYSCALL_64_after_hwframe+0x76/0x7e
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: 0.16%
- Percentil entre todas las CVEs puntuadas: 5
- Fecha de la puntuación: 6/10/2026
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
Referencias
- https://git.kernel.org/stable/c/1432ab0774cba43e8111be39989ff226531a9bac
- https://git.kernel.org/stable/c/19f2e4055626a58842ddec3282ad4465a80c6625
- https://git.kernel.org/stable/c/1d2b2b58fde9059a488bc25399e6c3d74e9b5548
- https://git.kernel.org/stable/c/3c36b87fc2a4cf88eadea8cf13923bd2b4f9a3fa
- https://git.kernel.org/stable/c/6d8c180c825cbc73eeffaa79591f8e142dacae70
- https://git.kernel.org/stable/c/b25298e89a297c42eb4c4d6f081d60375b820abb
- https://git.kernel.org/stable/c/df9ac55abd18628bd8cff687ea043660532a3654
- https://git.kernel.org/stable/c/e6b2fc7e34d4e7ca6b8598c33a3d45d59e455d8d
JSON original (NVD)
Mostrar
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"descriptions": [
{
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix invalid deref of rawdata when export_binary is unset\n\nIf the export_binary parameter is disabled on runtime, profiles that\nwere loaded before that will still have their rawdata stored in\napparmorfs, with a symbolic link to the rawdata on the policy\ndirectory. When one of those profiles are replaced, the rawdata is set\nto NULL, but when trying to resolve the symbolic links to rawdata for\nthat profile, it will try to dereference profile->rawdata->name when\nprofile->rawdata is now NULL causing an oops. Fix it by checking if\nrawdata is set.\n\n[ 168.653080] BUG: kernel NULL pointer dereference, address: 0000000000000088\n[ 168.657420] #PF: supervisor read access in kernel mode\n[ 168.660619] #PF: error_code(0x0000) - not-present page\n[ 168.663613] PGD 0 P4D 0\n[ 168.665450] Oops: Oops: 0000 [#1] SMP NOPTI\n[ 168.667836] CPU: 1 UID: 0 PID: 1729 Comm: ls Not tainted 6.19.0-rc7+ #3 PREEMPT(voluntary)\n[ 168.672308] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[ 168.679327] RIP: 0010:rawdata_get_link_base.isra.0+0x23/0x330\n[ 168.682768] Code: 90 90 90 90 90 90 90 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 89 55 d0 48 85 ff 0f 84 e3 01 00 00 <48> 83 3c 25 88 00 00 00 00 0f 84 d4 01 00 00 49 89 f6 49 89 cc e8\n[ 168.689818] RSP: 0018:ffffcdcb8200fb80 EFLAGS: 00010282\n[ 168.690871] RAX: ffffffffaee74ec0 RBX: 0000000000000000 RCX: ffffffffb0120158\n[ 168.692251] RDX: ffffcdcb8200fbe0 RSI: ffff88c187c9fa80 RDI: ffff88c186c98a80\n[ 168.693593] RBP: ffffcdcb8200fbc0 R08: 0000000000000000 R09: 0000000000000000\n[ 168.694941] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88c186c98a80\n[ 168.696289] R13: 00007fff005aaa20 R14: 0000000000000080 R15: ffff88c188f4fce0\n[ 168.697637] FS: 0000790e81c58280(0000) GS:ffff88c20a957000(0000) knlGS:0000000000000000\n[ 168.699227] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 168.700349] CR2: 0000000000000088 CR3: 000000012fd3e000 CR4: 0000000000350ef0\n[ 168.701696] Call Trace:\n[ 168.702325] <TASK>\n[ 168.702995] rawdata_get_link_data+0x1c/0x30\n[ 168.704145] vfs_readlink+0xd4/0x160\n[ 168.705152] do_readlinkat+0x114/0x180\n[ 168.706214] __x64_sys_readlink+0x1e/0x30\n[ 168.708653] x64_sys_call+0x1d77/0x26b0\n[ 168.709525] do_syscall_64+0x81/0x500\n[ 168.710348] ? do_statx+0x72/0xb0\n[ 168.711109] ? putname+0x3e/0x80\n[ 168.711845] ? __x64_sys_statx+0xb7/0x100\n[ 168.712711] ? x64_sys_call+0x10fc/0x26b0\n[ 168.713577] ? do_syscall_64+0xbf/0x500\n[ 168.714412] ? do_user_addr_fault+0x1d2/0x8d0\n[ 168.715404] ? irqentry_exit+0xb2/0x740\n[ 168.716359] ? exc_page_fault+0x90/0x1b0\n[ 168.717307] entry_SYSCALL_64_after_hwframe+0x76/0x7e"
}
],
"lastModified": "2026-06-17T10:52:48.670",
"configurations": [
{
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