{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46055", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.094Z", "datePublished": "2026-05-27T12:57:13.671Z", "dateUpdated": "2026-06-14T17:51:05.226Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-14T17:51:05.226Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: Fix string overrun due to missing termination\n\nWhen booting Ubuntu 26.04 with Linux 7.0-rc4 on an ARM64 Qualcomm\nSnapdragon X1 we see a string buffer overrun:\n\nBUG: KASAN: slab-out-of-bounds in aa_dfa_match (security/apparmor/match.c:535)\nRead of size 1 at addr ffff0008901cc000 by task snap-update-ns/2120\n\nCPU: 5 UID: 60578 PID: 2120 Comm: snap-update-ns Not tainted 7.0.0-rc4+ #22 PREEMPTLAZY\nHardware name: LENOVO 83ED/LNVNB161216, BIOS NHCN60WW 09/11/2025\nCall trace:\nshow_stack (arch/arm64/kernel/stacktrace.c:501) (C)\ndump_stack_lvl (lib/dump_stack.c:122)\nprint_report (mm/kasan/report.c:379 mm/kasan/report.c:482)\nkasan_report (mm/kasan/report.c:597)\n__asan_report_load1_noabort (mm/kasan/report_generic.c:378)\naa_dfa_match (security/apparmor/match.c:535)\nmatch_mnt_path_str (security/apparmor/mount.c:244 security/apparmor/mount.c:336)\nmatch_mnt (security/apparmor/mount.c:371)\naa_bind_mount (security/apparmor/mount.c:447 (discriminator 4))\napparmor_sb_mount (security/apparmor/lsm.c:719 (discriminator 1))\nsecurity_sb_mount (security/security.c:1062 (discriminator 31))\npath_mount (fs/namespace.c:4101)\n__arm64_sys_mount (fs/namespace.c:4172 fs/namespace.c:4361 fs/namespace.c:4338 fs/namespace.c:4338)\ninvoke_syscall.constprop.0 (arch/arm64/kernel/syscall.c:35 arch/arm64/kernel/syscall.c:49)\nel0_svc_common.constprop.0 (./include/linux/thread_info.h:142 (discriminator 2) arch/arm64/kernel/syscall.c:140 (discriminator 2))\ndo_el0_svc (arch/arm64/kernel/syscall.c:152)\nel0_svc (arch/arm64/kernel/entry-common.c:80 arch/arm64/kernel/entry-common.c:725)\nel0t_64_sync_handler (arch/arm64/kernel/entry-common.c:744)\nel0t_64_sync (arch/arm64/kernel/entry.S:596)\n\nAllocated by task 2120:\nkasan_save_stack (mm/kasan/common.c:58)\nkasan_save_track (./arch/arm64/include/asm/current.h:19 mm/kasan/common.c:70 mm/kasan/common.c:79)\nkasan_save_alloc_info (mm/kasan/generic.c:571)\n__kasan_kmalloc (mm/kasan/common.c:419)\n__kmalloc_noprof (./include/linux/kasan.h:263 mm/slub.c:5260 mm/slub.c:5272)\naa_get_buffer (security/apparmor/lsm.c:2201)\naa_bind_mount (security/apparmor/mount.c:442)\napparmor_sb_mount (security/apparmor/lsm.c:719 (discriminator 1))\nsecurity_sb_mount (security/security.c:1062 (discriminator 31))\npath_mount (fs/namespace.c:4101)\n__arm64_sys_mount (fs/namespace.c:4172 fs/namespace.c:4361 fs/namespace.c:4338 fs/namespace.c:4338)\ninvoke_syscall.constprop.0 (arch/arm64/kernel/syscall.c:35 arch/arm64/kernel/syscall.c:49)\nel0_svc_common.constprop.0 (./include/linux/thread_info.h:142 (discriminator 2) arch/arm64/kernel/syscall.c:140 (discriminator 2))\ndo_el0_svc (arch/arm64/kernel/syscall.c:152)\nel0_svc (arch/arm64/kernel/entry-common.c:80 arch/arm64/kernel/entry-common.c:725)\nel0t_64_sync_handler (arch/arm64/kernel/entry-common.c:744)\nel0t_64_sync (arch/arm64/kernel/entry.S:596)\n\nThe buggy address belongs to the object at ffff0008901ca000\nwhich belongs to the cache kmalloc-rnd-06-8k of size 8192\nThe buggy address is located 0 bytes to the right of\nallocated 8192-byte region [ffff0008901ca000, ffff0008901cc000)\n\nThe buggy address belongs to the physical page:\npage: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9101c8\nhead: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:-1 pincount:0\nflags: 0x8000000000000040(head|zone=2)\npage_type: f5(slab)\nraw: 8000000000000040 ffff000800016c40 fffffdffe2d14e10 ffff000800015c70\nraw: 0000000000000000 0000000800010001 00000000f5000000 0000000000000000\nhead: 8000000000000040 ffff000800016c40 fffffdffe2d14e10 ffff000800015c70\nhead: 0000000000000000 0000000800010001 00000000f5000000 0000000000000000\nhead: 8000000000000003 fffffdffe2407201 fffffdffffffffff 00000000ffffffff\nhead: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\nffff0008901cbf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\nffff0008\n---truncated---"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["security/apparmor/path.c"], "versions": [{"version": "93d4dbdc8da0b8a3ba86f4a08868084f8da872e1", "lessThan": "4b877ef27adc8ec187b0418629169856e7264e01", "status": "affected", "versionType": "git"}, {"version": "93d4dbdc8da0b8a3ba86f4a08868084f8da872e1", "lessThan": "828bf7929bedcb79b560b5b4e44f22abee07d31b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["security/apparmor/path.c"], "versions": [{"version": "7.0", "status": "affected"}, {"version": "0", "lessThan": "7.0", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4b877ef27adc8ec187b0418629169856e7264e01"}, {"url": "https://git.kernel.org/stable/c/828bf7929bedcb79b560b5b4e44f22abee07d31b"}], "title": "apparmor: Fix string overrun due to missing termination", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["security/apparmor/path.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4b877ef27adc8ec187b0418629169856e7264e01", "status": "affected", "version": "93d4dbdc8da0b8a3ba86f4a08868084f8da872e1", "versionType": "git"}, {"lessThan": "828bf7929bedcb79b560b5b4e44f22abee07d31b", "status": "affected", "version": "93d4dbdc8da0b8a3ba86f4a08868084f8da872e1", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["security/apparmor/path.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.0"}, {"lessThan": "7.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "37C6A06A-578A-467F-8EE4-E50B9A46C871", "versionEndExcluding": "7.0.4", "versionStartIncluding": "7.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: Fix string overrun due to missing termination\n\nWhen booting Ubuntu 26.04 with Linux 7.0-rc4 on an ARM64 Qualcomm\nSnapdragon X1 we see a string buffer overrun:\n\nBUG: KASAN: slab-out-of-bounds in aa_dfa_match (security/apparmor/match.c:535)\nRead of size 1 at addr ffff0008901cc000 by task snap-update-ns/2120\n\nCPU: 5 UID: 60578 PID: 2120 Comm: snap-update-ns Not tainted 7.0.0-rc4+ #22 PREEMPTLAZY\nHardware name: LENOVO 83ED/LNVNB161216, BIOS NHCN60WW 09/11/2025\nCall trace:\nshow_stack (arch/arm64/kernel/stacktrace.c:501) (C)\ndump_stack_lvl (lib/dump_stack.c:122)\nprint_report (mm/kasan/report.c:379 mm/kasan/report.c:482)\nkasan_report (mm/kasan/report.c:597)\n__asan_report_load1_noabort (mm/kasan/report_generic.c:378)\naa_dfa_match (security/apparmor/match.c:535)\nmatch_mnt_path_str (security/apparmor/mount.c:244 security/apparmor/mount.c:336)\nmatch_mnt (security/apparmor/mount.c:371)\naa_bind_mount (security/apparmor/mount.c:447 (discriminator 4))\napparmor_sb_mount (security/apparmor/lsm.c:719 (discriminator 1))\nsecurity_sb_mount (security/security.c:1062 (discriminator 31))\npath_mount (fs/namespace.c:4101)\n__arm64_sys_mount (fs/namespace.c:4172 fs/namespace.c:4361 fs/namespace.c:4338 fs/namespace.c:4338)\ninvoke_syscall.constprop.0 (arch/arm64/kernel/syscall.c:35 arch/arm64/kernel/syscall.c:49)\nel0_svc_common.constprop.0 (./include/linux/thread_info.h:142 (discriminator 2) arch/arm64/kernel/syscall.c:140 (discriminator 2))\ndo_el0_svc (arch/arm64/kernel/syscall.c:152)\nel0_svc (arch/arm64/kernel/entry-common.c:80 arch/arm64/kernel/entry-common.c:725)\nel0t_64_sync_handler (arch/arm64/kernel/entry-common.c:744)\nel0t_64_sync (arch/arm64/kernel/entry.S:596)\n\nAllocated by task 2120:\nkasan_save_stack (mm/kasan/common.c:58)\nkasan_save_track (./arch/arm64/include/asm/current.h:19 mm/kasan/common.c:70 mm/kasan/common.c:79)\nkasan_save_alloc_info (mm/kasan/generic.c:571)\n__kasan_kmalloc (mm/kasan/common.c:419)\n__kmalloc_noprof (./include/linux/kasan.h:263 mm/slub.c:5260 mm/slub.c:5272)\naa_get_buffer (security/apparmor/lsm.c:2201)\naa_bind_mount (security/apparmor/mount.c:442)\napparmor_sb_mount (security/apparmor/lsm.c:719 (discriminator 1))\nsecurity_sb_mount (security/security.c:1062 (discriminator 31))\npath_mount (fs/namespace.c:4101)\n__arm64_sys_mount (fs/namespace.c:4172 fs/namespace.c:4361 fs/namespace.c:4338 fs/namespace.c:4338)\ninvoke_syscall.constprop.0 (arch/arm64/kernel/syscall.c:35 arch/arm64/kernel/syscall.c:49)\nel0_svc_common.constprop.0 (./include/linux/thread_info.h:142 (discriminator 2) arch/arm64/kernel/syscall.c:140 (discriminator 2))\ndo_el0_svc (arch/arm64/kernel/syscall.c:152)\nel0_svc (arch/arm64/kernel/entry-common.c:80 arch/arm64/kernel/entry-common.c:725)\nel0t_64_sync_handler (arch/arm64/kernel/entry-common.c:744)\nel0t_64_sync (arch/arm64/kernel/entry.S:596)\n\nThe buggy address belongs to the object at ffff0008901ca000\nwhich belongs to the cache kmalloc-rnd-06-8k of size 8192\nThe buggy address is located 0 bytes to the right of\nallocated 8192-byte region [ffff0008901ca000, ffff0008901cc000)\n\nThe buggy address belongs to the physical page:\npage: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9101c8\nhead: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:-1 pincount:0\nflags: 0x8000000000000040(head|zone=2)\npage_type: f5(slab)\nraw: 8000000000000040 ffff000800016c40 fffffdffe2d14e10 ffff000800015c70\nraw: 0000000000000000 0000000800010001 00000000f5000000 0000000000000000\nhead: 8000000000000040 ffff000800016c40 fffffdffe2d14e10 ffff000800015c70\nhead: 0000000000000000 0000000800010001 00000000f5000000 0000000000000000\nhead: 8000000000000003 fffffdffe2407201 fffffdffffffffff 00000000ffffffff\nhead: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\nffff0008901cbf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\nffff0008\n---truncated---"}], "id": "CVE-2026-46055", "lastModified": "2026-06-17T10:52:59.437", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-27T14:17:25.190", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4b877ef27adc8ec187b0418629169856e7264e01"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/828bf7929bedcb79b560b5b4e44f22abee07d31b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: apparmor: Fix string overrun due to missing termination", "id": "2482003", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482003"}, "csaw": false, "cwe": "CWE-170", "details": ["A flaw was found in the AppArmor security module of the Linux kernel. A missing string termination in the `aa_dfa_match` function can lead to a string buffer overrun. This vulnerability could allow a local attacker to cause a denial of service (DoS) or potentially disclose sensitive information due to a slab-out-of-bounds read."], "name": "CVE-2026-46055", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46055\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46055\nhttps://lore.kernel.org/linux-cve-announce/2026052754-CVE-2026-46055-942d@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[93d4dbdc8da0b8a3ba86f4a08868084f8da872e1,4b877ef27adc8ec187b0418629169856e7264e01)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[93d4dbdc8da0b8a3ba86f4a08868084f8da872e1,828bf7929bedcb79b560b5b4e44f22abee07d31b)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "7.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.4,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-27T20:30:40.558008+00:00", "updated": "2026-06-17T23:45:13.995538+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}