CVE catalog

CVE-2026-46055

In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix string overrun due to missing termination When booting Ubuntu 26.04 with Linux 7.0-rc4 on an ARM64 Qualcomm Snapdrag

[CVE catalog]

Severity: High · CVSS 7.1
Published: May 27, 2026, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.15% · Oct 25, 2026

In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix string overrun due to missing termination When booting Ubuntu 26.04 with Linux 7.0-rc4 on an ARM64 Qualcomm Snapdragon X1 we see a string buffer overrun: BUG: KASAN: slab-out-of-bounds in aa_dfa_match (security/apparmor/match.c:535) Read of size 1 at addr ffff0008901cc000 by task snap-update-ns/2120 CPU: 5 UID: 60578 PID: 2120 Comm: snap-update-ns Not tainted 7.0.0-rc4+ #22 PREEMPTLAZY Hardware name: LENOVO 83ED/LNVNB161216, BIOS NHCN60WW 09/11/2025 Call trace: show_stack (arch/arm64/kernel/stacktrace.c:501) (C) dump_stack_lvl (lib/dump_stack.c:122) print_report (mm/kasan/report.c:379 mm/kasan/report.c:482) kasan_report (mm/kasan/report.c:597) __asan_report_load1_noabort (mm/kasan/report_generic.c:378) aa_dfa_match (security/apparmor/match.c:535) match_mnt_path_str (security/apparmor/mount.c:244 security/apparmor/mount.c:336) match_mnt (security/apparmor/mount.c:371) aa_bind_mount (security/apparmor/mount.c:447 (discriminator 4)) apparmor_sb_mount (security/apparmor/lsm.c:719 (discriminator 1)) security_sb_mount (security/security.c:1062 (discriminator 31)) path_mount (fs/namespace.c:4101) __arm64_sys_mount (fs/namespace.c:4172 fs/namespace.c:4361 fs/namespace.c:4338 fs/namespace.c:4338) invoke_syscall.constprop.0 (arch/arm64/kernel/syscall.c:35 arch/arm64/kernel/syscall.c:49) el0_svc_common.constprop.0 (./include/linux/thread_info.h:142 (discriminator 2) arch/arm64/kernel/syscall.c:140 (discriminator 2)) do_el0_svc (arch/arm64/kernel/syscall.c:152) el0_svc (arch/arm64/kernel/entry-common.c:80 arch/arm64/kernel/entry-common.c:725) el0t_64_sync_handler (arch/arm64/kernel/entry-common.c:744) el0t_64_sync (arch/arm64/kernel/entry.S:596) Allocated by task 2120: kasan_save_stack (mm/kasan/common.c:58) kasan_save_track (./arch/arm64/include/asm/current.h:19 mm/kasan/common.c:70 mm/kasan/common.c:79) kasan_save_alloc_info (mm/kasan/generic.c:571) __kasan_kmalloc (mm/kasan/common.c:419) __kmalloc_noprof (./include/linux/kasan.h:263 mm/slub.c:5260 mm/slub.c:5272) aa_get_buffer (security/apparmor/lsm.c:2201) aa_bind_mount (security/apparmor/mount.c:442) apparmor_sb_mount (security/apparmor/lsm.c:719 (discriminator 1)) security_sb_mount (security/security.c:1062 (discriminator 31)) path_mount (fs/namespace.c:4101) __arm64_sys_mount (fs/namespace.c:4172 fs/namespace.c:4361 fs/namespace.c:4338 fs/namespace.c:4338) invoke_syscall.constprop.0 (arch/arm64/kernel/syscall.c:35 arch/arm64/kernel/syscall.c:49) el0_svc_common.constprop.0 (./include/linux/thread_info.h:142 (discriminator 2) arch/arm64/kernel/syscall.c:140 (discriminator 2)) do_el0_svc (arch/arm64/kernel/syscall.c:152) el0_svc (arch/arm64/kernel/entry-common.c:80 arch/arm64/kernel/entry-common.c:725) el0t_64_sync_handler (arch/arm64/kernel/entry-common.c:744) el0t_64_sync (arch/arm64/kernel/entry.S:596) The buggy address belongs to the object at ffff0008901ca000 which belongs to the cache kmalloc-rnd-06-8k of size 8192 The buggy address is located 0 bytes to the right of allocated 8192-byte region [ffff0008901ca000, ffff0008901cc000) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9101c8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:-1 pincount:0 flags: 0x8000000000000040(head|zone=2) page_type: f5(slab) raw: 8000000000000040 ffff000800016c40 fffffdffe2d14e10 ffff000800015c70 raw: 0000000000000000 0000000800010001 00000000f5000000 0000000000000000 head: 8000000000000040 ffff000800016c40 fffffdffe2d14e10 ffff000800015c70 head: 0000000000000000 0000000800010001 00000000f5000000 0000000000000000 head: 8000000000000003 fffffdffe2407201 fffffdffffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0008901cbf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0008 ---truncated---

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	linux	sid	`7.2.12-1`	fixed
Debian	linux	forky	`7.2.12-1`	fixed
Debian	linux	trixie	`6.12.107-1`	not affected
Debian	linux	trixie-security	`6.12.113-1`	not affected
Debian	linux	bookworm	`6.1.176-1`	not affected
Debian	linux	bookworm-security	`6.1.190-1`	not affected
Cpe	linux_kernel	Not reported	`7.0.4`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	linux	source	sid	`7.0.4-1`	not yet assigned	Not reported	Not reported
Debian	linux	source	forky	`7.0.4-1`	not yet assigned	Not reported	Not reported
Debian	linux	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	linux	source	bookworm	`Not affected`	unimportant	Not reported	Not reported
Cpe	linux_kernel	cpe	Not reported	`7.0.4`	Not reported	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[bpftool]Not affected
Source package: [linux]
Details (6)
- 7.1.0+6.1.176-1 · amd64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 7.1.0+6.1.176-1 · arm64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 7.5.0+6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 7.5.0+6.12.95-1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 7.1.0+6.1.180-1 · amd64 · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
- 7.1.0+6.1.180-1 · arm64 · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
[hyperv-daemons]Not affected
Source package: [linux]
Details (6)
- 6.1.176-1 · amd64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.176-1 · arm64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.95-1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · amd64 · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · arm64 · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
[intel-sdsi]Not affected
Source package: [linux]
Details (1)
- 6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
[libcpupower1]Not affected
Source package: [linux]
Details (6)
- 6.1.176-1 · amd64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.176-1 · arm64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.95-1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · amd64 · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · arm64 · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
[libcpupower-dev]Not affected
Source package: [linux]
Details (6)
- 6.1.176-1 · amd64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.176-1 · arm64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.95-1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · amd64 · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · arm64 · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
[linux-bpf-dev]Not affected
Source package: [linux]
Details (2)
- 6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.95-1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
[linux-compiler-gcc-12-x86]Not affected
Source package: [linux]
Details (2)
- 6.1.176-1 · amd64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · amd64 · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
[linux-config-6.1]Not affected
Source package: [linux]
Details (4)
- 6.1.176-1 · amd64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.176-1 · arm64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · amd64 · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · arm64 · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
[linux-cpupower]Not affected
Source package: [linux]
Details (6)
- 6.1.176-1 · amd64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.176-1 · arm64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.95-1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · amd64 · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · arm64 · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
[linux-doc]Not affected
Source package: [linux]
Details (32)
- 6.1.170-3 · all · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.170-3 · all · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.176-1 · all · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.176-1 · all · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.12.43-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.43-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.57-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.57-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.63-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.63-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.69-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.69-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.73-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.73-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.74-2~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.74-2~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.85-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.85-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.86-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.86-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.88-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.88-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.90-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.90-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.90-2~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.90-2~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.94-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.94-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.95-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.12.95-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · all · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · all · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
[linux-doc-6.1]Not affected
Source package: [linux]
Details (6)
- 6.1.170-3 · all · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.170-3 · all · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.176-1 · all · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.176-1 · all · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · all · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
- 6.1.180-1 · all · bookworm-security
  Not affected
  nvd · linux · debian · bookworm
[linux-headers-6.1.0-47-amd64]Not affected
Source package: [linux]
Details (1)
- 6.1.170-3 · amd64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
[linux-headers-6.1.0-47-arm64]Not affected
Source package: [linux]
Details (1)
- 6.1.170-3 · arm64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
[linux-headers-6.1.0-47-cloud-amd64]Not affected
Source package: [linux]
Details (1)
- 6.1.170-3 · amd64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
[linux-headers-6.1.0-47-cloud-arm64]Not affected
Source package: [linux]
Details (1)
- 6.1.170-3 · arm64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
[linux-headers-6.1.0-47-common]Not affected
Source package: [linux]
Details (2)
- 6.1.170-3 · all · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.170-3 · all · bookworm
  Not affected
  nvd · linux · debian · bookworm
[linux-headers-6.1.0-47-common-rt]Not affected
Source package: [linux]
Details (2)
- 6.1.170-3 · all · bookworm
  Not affected
  nvd · linux · debian · bookworm
- 6.1.170-3 · all · bookworm
  Not affected
  nvd · linux · debian · bookworm
[linux-headers-6.1.0-47-rt-amd64]Not affected
Source package: [linux]
Details (1)
- 6.1.170-3 · amd64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
[linux-headers-6.1.0-47-rt-arm64]Not affected
Source package: [linux]
Details (1)
- 6.1.170-3 · arm64 · bookworm
  Not affected
  nvd · linux · debian · bookworm
[linux-headers-6.1.0-50-amd64]Not affected
Source package: [linux]
Details (1)
- 6.1.176-1 · amd64 · bookworm
  Not affected
  nvd · linux · debian · bookworm

Next results

Observed: Oct 27, 2026, 7:32:47 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]