Medium 5.5Published May 27, 2026

CVE-2026-45965apparmor: fix invalid deref of rawdata when export_binary is unset

Updated under an hour ago (Oct 26, 2026, 2:40 AM ET)

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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. [ 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: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1180b4c757aab5506f1be367000364dd5cf5cd02 before e6b2fc7e34d4e7ca6b8598c33a3d45d59e455d8d; 1180b4c757aab5506f1be367000364dd5cf5cd02 builds before 6d8c180c825cbc73eeffaa79591f8e142dacae70; 1180b4c757aab5506f1be367000364dd5cf5cd02 builds before 3c36b87fc2a4cf88eadea8cf13923bd2b4f9a3fa; from 1180b4c757aab5506f1be367000364dd5cf5cd02 before b25298e89a297c42eb4c4d6f081d60375b820abb; 1180b4c757aab5506f1be367000364dd5cf5cd02 builds before 19f2e4055626a58842ddec3282ad4465a80c6625; 1180b4c757aab5506f1be367000364dd5cf5cd02 builds before 1d2b2b58fde9059a488bc25399e6c3d74e9b5548; from 1180b4c757aab5506f1be367000364dd5cf5cd02 before 1432ab0774cba43e8111be39989ff226531a9bac; from 1180b4c757aab5506f1be367000364dd5cf5cd02 before df9ac55abd18628bd8cff687ea043660532a3654	CNA record
linux linux_kernel linux:linux_kernel	from 4.17 before 5.10.252; from 5.11 before 5.15.202; from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.14; from 6.19 before 6.19.4	NVD

References

https://git.kernel.org/stable/c/e6b2fc7e34d4e7ca6b8598c33a3d45d59e455d8dpatch
https://git.kernel.org/stable/c/6d8c180c825cbc73eeffaa79591f8e142dacae70patch
https://git.kernel.org/stable/c/3c36b87fc2a4cf88eadea8cf13923bd2b4f9a3fapatch
https://git.kernel.org/stable/c/b25298e89a297c42eb4c4d6f081d60375b820abbpatch
https://git.kernel.org/stable/c/19f2e4055626a58842ddec3282ad4465a80c6625patch
https://git.kernel.org/stable/c/1d2b2b58fde9059a488bc25399e6c3d74e9b5548patch
https://git.kernel.org/stable/c/1432ab0774cba43e8111be39989ff226531a9bacpatch
https://git.kernel.org/stable/c/df9ac55abd18628bd8cff687ea043660532a3654patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.