CVE-2026-23244
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: nvme: fix memory allocation in nvme_pr_read_keys() nvme_pr_read_keys() takes num_keys from userspace and uses it to calculate the allocation size for rse via struct_size(). The upper limit is PR_KEYS_MAX (64K). A malicious or buggy userspace can pass a large num_keys value that results in a 4MB allocation attempt at most, causing a warning in the page allocator when the order exceeds MAX_PAGE_ORDER. To fix this, use kvzalloc() instead of kzalloc(). This bug has the same reasoning and fix with the patch below: https://lore.kernel.org/linux-block/[email protected]/ Warning log: WARNING: mm/page_alloc.c:5216 at __alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216, CPU#1: syz-executor117/272 Modules linked in: CPU: 1 UID: 0 PID: 272 Comm: syz-executor117 Not tainted 6.19.0 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 RIP: 0010:__alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216 Code: ff 83 bd a8 fe ff ff 0a 0f 86 69 fb ff ff 0f b6 1d f9 f9 c4 04 80 fb 01 0f 87 3b 76 30 ff 83 e3 01 75 09 c6 05 e4 f9 c4 04 01 <0f> 0b 48 c7 85 70 fe ff ff 00 00 00 00 e9 8f fd ff ff 31 c0 e9 0d RSP: 0018:ffffc90000fcf450 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff920001f9ea0 RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000040dc0 RBP: ffffc90000fcf648 R08: ffff88800b6c3380 R09: 0000000000000001 R10: ffffc90000fcf840 R11: ffff88807ffad280 R12: 0000000000000000 R13: 0000000000040dc0 R14: 0000000000000001 R15: ffffc90000fcf620 FS: 0000555565db33c0(0000) GS:ffff8880be26c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002000000c CR3: 0000000003b72000 CR4: 00000000000006f0 Call Trace: <TASK> alloc_pages_mpol+0x236/0x4d0 mm/mempolicy.c:2486 alloc_frozen_pages_noprof+0x149/0x180 mm/mempolicy.c:2557 ___kmalloc_large_node+0x10c/0x140 mm/slub.c:5598 __kmalloc_large_node_noprof+0x25/0xc0 mm/slub.c:5629 __do_kmalloc_node mm/slub.c:5645 [inline] __kmalloc_noprof+0x483/0x6f0 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] nvme_pr_read_keys+0x8f/0x4c0 drivers/nvme/host/pr.c:245 blkdev_pr_read_keys block/ioctl.c:456 [inline] blkdev_common_ioctl+0x1b71/0x29b0 block/ioctl.c:730 blkdev_ioctl+0x299/0x700 block/ioctl.c:786 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x1bf/0x220 fs/ioctl.c:583 x64_sys_call+0x1280/0x21b0 mnt/fuzznvme_1/fuzznvme/linux-build/v6.19/./arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x71/0x330 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fb893d3108d Code: 28 c3 e8 46 1e 00 00 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffff61f2f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffff61f3138 RCX: 00007fb893d3108d RDX: 0000000020000040 RSI: 00000000c01070ce RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 00007ffff61f3138 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffff61f3128 R14: 00007fb893dae530 R15: 0000000000000001 </TASK>
View original CVE JSON
{
"id": "CVE-2026-23244",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-03-18T11:16:16.270",
"lastModified": "2026-11-05T22:18:08.277",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix memory allocation in nvme_pr_read_keys()\n\nnvme_pr_read_keys() takes num_keys from userspace and uses it to\ncalculate the allocation size for rse via struct_size(). The upper\nlimit is PR_KEYS_MAX (64K).\n\nA malicious or buggy userspace can pass a large num_keys value that\nresults in a 4MB allocation attempt at most, causing a warning in\nthe page allocator when the order exceeds MAX_PAGE_ORDER.\n\nTo fix this, use kvzalloc() instead of kzalloc().\n\nThis bug has the same reasoning and fix with the patch below:\nhttps://lore.kernel.org/linux-block/[email protected]/\n\nWarning log:\nWARNING: mm/page_alloc.c:5216 at __alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216, CPU#1: syz-executor117/272\nModules linked in:\nCPU: 1 UID: 0 PID: 272 Comm: syz-executor117 Not tainted 6.19.0 #1 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\nRIP: 0010:__alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216\nCode: ff 83 bd a8 fe ff ff 0a 0f 86 69 fb ff ff 0f b6 1d f9 f9 c4 04 80 fb 01 0f 87 3b 76 30 ff 83 e3 01 75 09 c6 05 e4 f9 c4 04 01 <0f> 0b 48 c7 85 70 fe ff ff 00 00 00 00 e9 8f fd ff ff 31 c0 e9 0d\nRSP: 0018:ffffc90000fcf450 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff920001f9ea0\nRDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000040dc0\nRBP: ffffc90000fcf648 R08: ffff88800b6c3380 R09: 0000000000000001\nR10: ffffc90000fcf840 R11: ffff88807ffad280 R12: 0000000000000000\nR13: 0000000000040dc0 R14: 0000000000000001 R15: ffffc90000fcf620\nFS: 0000555565db33c0(0000) GS:ffff8880be26c000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000002000000c CR3: 0000000003b72000 CR4: 00000000000006f0\nCall Trace:\n <TASK>\n alloc_pages_mpol+0x236/0x4d0 mm/mempolicy.c:2486\n alloc_frozen_pages_noprof+0x149/0x180 mm/mempolicy.c:2557\n ___kmalloc_large_node+0x10c/0x140 mm/slub.c:5598\n __kmalloc_large_node_noprof+0x25/0xc0 mm/slub.c:5629\n __do_kmalloc_node mm/slub.c:5645 [inline]\n __kmalloc_noprof+0x483/0x6f0 mm/slub.c:5669\n kmalloc_noprof include/linux/slab.h:961 [inline]\n kzalloc_noprof include/linux/slab.h:1094 [inline]\n nvme_pr_read_keys+0x8f/0x4c0 drivers/nvme/host/pr.c:245\n blkdev_pr_read_keys block/ioctl.c:456 [inline]\n blkdev_common_ioctl+0x1b71/0x29b0 block/ioctl.c:730\n blkdev_ioctl+0x299/0x700 block/ioctl.c:786\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:597 [inline]\n __se_sys_ioctl fs/ioctl.c:583 [inline]\n __x64_sys_ioctl+0x1bf/0x220 fs/ioctl.c:583\n x64_sys_call+0x1280/0x21b0 mnt/fuzznvme_1/fuzznvme/linux-build/v6.19/./arch/x86/include/generated/asm/syscalls_64.h:17\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x71/0x330 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0033:0x7fb893d3108d\nCode: 28 c3 e8 46 1e 00 00 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007ffff61f2f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 00007ffff61f3138 RCX: 00007fb893d3108d\nRDX: 0000000020000040 RSI: 00000000c01070ce RDI: 0000000000000003\nRBP: 0000000000000001 R08: 0000000000000000 R09: 00007ffff61f3138\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001\nR13: 00007ffff61f3128 R14: 00007fb893dae530 R15: 0000000000000001\n </TASK>"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnvme: corregir la asignación de memoria en nvme_pr_read_keys()\n\nnvme_pr_read_keys() toma num_keys del espacio de usuario y lo usa para calcular el tamaño de asignación para rse a través de struct_size(). El límite superior es PR_KEYS_MAX (64K).\n\nUn espacio de usuario malicioso o con errores puede pasar un valor grande de num_keys que resulta en un intento de asignación de 4MB como máximo, causando una advertencia en el asignador de páginas cuando el orden excede MAX_PAGE_ORDER.\n\nPara corregir esto, use kvzalloc() en lugar de kzalloc().\n\nEste error tiene el mismo razonamiento y corrección con el parche a continuación:\nhttps://lore.kernel.org/linux-block/[email protected]/\n\nRegistro de advertencia:\nADVERTENCIA: mm/page_alloc.c:5216 en __alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216, CPU#1: syz-executor117/272\nMódulos enlazados:\nCPU: 1 UID: 0 PID: 272 Comm: syz-executor117 No contaminado 6.19.0 #1 PREEMPT(voluntario)\nNombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\nRIP: 0010:__alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216\nCódigo: ff 83 bd a8 fe ff ff 0a 0f 86 69 fb ff ff 0f b6 1d f9 f9 c4 04 80 fb 01 0f 87 3b 76 30 ff 83 e3 01 75 09 c6 05 e4 f9 c4 04 01 <0f> 0b 48 c7 85 70 fe ff ff 00 00 00 00 e9 8f fd ff ff 31 c0 e9 0d\nRSP: 0018:ffffc90000fcf450 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff920001f9ea0\nRDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000040dc0\nRBP: ffffc90000fcf648 R08: ffff88800b6c3380 R09: 0000000000000001\nR10: ffffc90000fcf840 R11: ffff88807ffad280 R12: 0000000000000000\nR13: 0000000000040dc0 R14: 0000000000000001 R15: ffffc90000fcf620\nFS: 0000555565db33c0(0000) GS:ffff8880be26c000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000002000000c CR3: 0000000003b72000 CR4: 00000000000006f0\nRastro de llamadas:\n \n alloc_pages_mpol+0x236/0x4d0 mm/mempolicy.c:2486\n alloc_frozen_pages_noprof+0x149/0x180 mm/mempolicy.c:2557\n ___kmalloc_large_node+0x10c/0x140 mm/slub.c:5598\n __kmalloc_large_node_noprof+0x25/0xc0 mm/slub.c:5629\n __do_kmalloc_node mm/slub.c:5645 [inline]\n __kmalloc_noprof+0x483/0x6f0 mm/slub.c:5669\n kmalloc_noprof include/linux/slab.h:961 [inline]\n kzalloc_noprof include/linux/slab.h:1094 [inline]\n nvme_pr_read_keys+0x8f/0x4c0 drivers/nvme/host/pr.c:245\n blkdev_pr_read_keys block/ioctl.c:456 [inline]\n blkdev_common_ioctl+0x1b71/0x29b0 block/ioctl.c:730\n blkdev_ioctl+0x299/0x700 block/ioctl.c:786\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:597 [inline]\n __se_sys_ioctl fs/ioctl.c:583 [inline]\n __x64_sys_ioctl+0x1bf/0x220 fs/ioctl.c:583\n x64_sys_call+0x1280/0x21b0 mnt/fuzznvme_1/fuzznvme/linux-build/v6.19/./arch/x86/include/generated/asm/syscalls_64.h:17\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x71/0x330 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0033:0x7fb893d3108d\nCódigo: 28 c3 e8 46 1e 00 00 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007ffff61f2f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 00007ffff61f3138 RCX: 00007fb893d3108d\nRDX: 0000000020000040 RSI: 00000000c01070ce RDI: 0000000000000003\nRBP: 0000000000000001 R08: 0000000000000000 R09: 00007ffff61f3138\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001\nR13: 00007ffff61f3128 R14: 00007fb893dae530 R15: 0000000000000001\n "
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/nvme/host/pr.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5fd96a4e15de8442915a912233d800c56f49001d",
"lessThan": "e42ff5abbd14927553b624c0e06d24df76156fe6",
"versionType": "git",
"status": "affected"
},
{
"version": "5fd96a4e15de8442915a912233d800c56f49001d",
"lessThan": "15fb6d627484ee39ed73e202ef4720e1fa5c898e",
"versionType": "git",
"status": "affected"
},
{
"version": "5fd96a4e15de8442915a912233d800c56f49001d",
"lessThan": "5a501379a010690ae9ae88bef62a1bae1aca32e6",
"versionType": "git",
"status": "affected"
},
{
"version": "5fd96a4e15de8442915a912233d800c56f49001d",
"lessThan": "baef52d80093bd686e70b3cb7e0512a40ae76705",
"versionType": "git",
"status": "affected"
},
{
"version": "5fd96a4e15de8442915a912233d800c56f49001d",
"lessThan": "c3320153769f05fd7fe9d840cb555dd3080ae424",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/nvme/host/pr.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.5",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.5",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.130",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.77",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.17",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.19.7",
"lessThanOrEqual": "6.19.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.0",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
"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",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 5.2
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-05T21:22:58.889383Z",
"id": "CVE-2026-23244",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-125"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.5.1",
"versionEndExcluding": "6.6.130",
"matchCriteriaId": "32772849-BF02-4208-99C1-068667D43F23"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.7",
"versionEndExcluding": "6.12.77",
"matchCriteriaId": "B3D12E00-E42D-4056-B354-BAD4903C03A5"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.13",
"versionEndExcluding": "6.18.17",
"matchCriteriaId": "A5E006E4-59C7-43C1-9231-62A72219F2BA"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.19",
"versionEndExcluding": "6.19.7",
"matchCriteriaId": "69245D10-0B71-485E-80C3-A64F077004D3"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:6.5:-:*:*:*:*:*:*",
"matchCriteriaId": "A2D9420A-9BF4-4C16-B6DA-8A1D279F7384"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*",
"matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*",
"matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/15fb6d627484ee39ed73e202ef4720e1fa5c898e",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/5a501379a010690ae9ae88bef62a1bae1aca32e6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/baef52d80093bd686e70b3cb7e0512a40ae76705",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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]
},
{
"url": "https://git.kernel.org/stable/c/c3320153769f05fd7fe9d840cb555dd3080ae424",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/e42ff5abbd14927553b624c0e06d24df76156fe6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
}
]
}