PT-2026-43832 · Linux · Linux

Published

2026-05-27

·

Updated

2026-05-27

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CVE-2026-45965

None

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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] [ 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

Related Identifiers

CVE-2026-45965

Affected Products

Linux