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CVE-2026-23219

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

mm/slab: Add alloc_tagging_slab_free_hook for memcg_alloc_abort_single

When CONFIG_MEM_ALLOC_PROFILING_DEBUG is enabled, the following warning may be noticed:

When __memcg_slab_post_alloc_hook() fails, there are two different free paths depending on whether size == 1 or size != 1. In the kmem_cache_free_bulk() path, we do call alloc_tagging_slab_free_hook(). However, in memcg_alloc_abort_single() we don't, the above warning will be triggered on the next allocation.

Therefore, add alloc_tagging_slab_free_hook() to the memcg_alloc_abort_single() path.

Detalles técnicos trazas, registros y código del informe original
[ 3959.023862] ------------[ cut here ]------------
[ 3959.023891] alloc_tag was not cleared (got tag for lib/xarray.c:378)
[ 3959.023947] WARNING: ./include/linux/alloc_tag.h:155 at alloc_tag_add+0x128/0x178, CPU#6: mkfs.ntfs/113998
[ 3959.023978] Modules linked in: dns_resolver tun brd overlay exfat btrfs blake2b libblake2b xor xor_neon raid6_pq loop sctp ip6_udp_tunnel udp_tunnel ext4 crc16 mbcache jbd2 rfkill sunrpc vfat fat sg fuse nfnetlink sr_mod virtio_gpu cdrom drm_client_lib virtio_dma_buf drm_shmem_helper drm_kms_helper ghash_ce drm sm4 backlight virtio_net net_failover virtio_scsi failover virtio_console virtio_blk virtio_mmio dm_mirror dm_region_hash dm_log dm_multipath dm_mod i2c_dev aes_neon_bs aes_ce_blk [last unloaded: hwpoison_inject]
[ 3959.024170] CPU: 6 UID: 0 PID: 113998 Comm: mkfs.ntfs Kdump: loaded Tainted: G        W           6.19.0-rc7+ #7 PREEMPT(voluntary)
[ 3959.024182] Tainted: [W]=WARN
[ 3959.024186] Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022
[ 3959.024192] pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 3959.024199] pc : alloc_tag_add+0x128/0x178
[ 3959.024207] lr : alloc_tag_add+0x128/0x178
[ 3959.024214] sp : ffff80008b696d60
[ 3959.024219] x29: ffff80008b696d60 x28: 0000000000000000 x27: 0000000000000240
[ 3959.024232] x26: 0000000000000000 x25: 0000000000000240 x24: ffff800085d17860
[ 3959.024245] x23: 0000000000402800 x22: ffff0000c0012dc0 x21: 00000000000002d0
[ 3959.024257] x20: ffff0000e6ef3318 x19: ffff800085ae0410 x18: 0000000000000000
[ 3959.024269] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
[ 3959.024281] x14: 0000000000000000 x13: 0000000000000001 x12: ffff600064101293
[ 3959.024292] x11: 1fffe00064101292 x10: ffff600064101292 x9 : dfff800000000000
[ 3959.024305] x8 : 00009fff9befed6e x7 : ffff000320809493 x6 : 0000000000000001
[ 3959.024316] x5 : ffff000320809490 x4 : ffff600064101293 x3 : ffff800080691838
[ 3959.024328] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000d5bcd640
[ 3959.024340] Call trace:
[ 3959.024346]  alloc_tag_add+0x128/0x178 (P)
[ 3959.024355]  __alloc_tagging_slab_alloc_hook+0x11c/0x1a8
[ 3959.024362]  kmem_cache_alloc_lru_noprof+0x1b8/0x5e8
[ 3959.024369]  xas_alloc+0x304/0x4f0
[ 3959.024381]  xas_create+0x1e0/0x4a0
[ 3959.024388]  xas_store+0x68/0xda8
[ 3959.024395]  __filemap_add_folio+0x5b0/0xbd8
[ 3959.024409]  filemap_add_folio+0x16c/0x7e0
[ 3959.024416]  __filemap_get_folio_mpol+0x2dc/0x9e8
[ 3959.024424]  iomap_get_folio+0xfc/0x180
[ 3959.024435]  __iomap_get_folio+0x2f8/0x4b8
[ 3959.024441]  iomap_write_begin+0x198/0xc18
[ 3959.024448]  iomap_write_iter+0x2ec/0x8f8
[ 3959.024454]  iomap_file_buffered_write+0x19c/0x290
[ 3959.024461]  blkdev_write_iter+0x38c/0x978
[ 3959.024470]  vfs_write+0x4d4/0x928
[ 3959.024482]  ksys_write+0xfc/0x1f8
[ 3959.024489]  __arm64_sys_write+0x74/0xb0
[ 3959.024496]  invoke_syscall+0xd4/0x258
[ 3959.024507]  el0_svc_common.constprop.0+0xb4/0x240
[ 3959.024514]  do_el0_svc+0x48/0x68
[ 3959.024520]  el0_svc+0x40/0xf8
[ 3959.024526]  el0t_64_sync_handler+0xa0/0xe8
[ 3959.024533]  el0t_64_sync+0x1ac/0x1b0
[ 3959.024540] ---[ end trace 0000000000000000 ]---

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-23219",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "9f9796b413d3c417f34cae427c4e47bfdd3a7454",
              "lessThan": "b8bc72587c79fe52c14732e16a766b6eded00707",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9f9796b413d3c417f34cae427c4e47bfdd3a7454",
              "lessThan": "e8af57e090790983591f6927b3d89ee6383f8c1e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9f9796b413d3c417f34cae427c4e47bfdd3a7454",
              "lessThan": "e6c53ead2d8fa73206e0a63e9cd9aea6bc929837",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "mm/slub.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.10",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.70",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.10",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "mm/slub.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-02-18T15:18:43.310",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/b8bc72587c79fe52c14732e16a766b6eded00707",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e6c53ead2d8fa73206e0a63e9cd9aea6bc929837",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e8af57e090790983591f6927b3d89ee6383f8c1e",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-772"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/slab: Add alloc_tagging_slab_free_hook for memcg_alloc_abort_single\n\nWhen CONFIG_MEM_ALLOC_PROFILING_DEBUG is enabled, the following warning\nmay be noticed:\n\n[ 3959.023862] ------------[ cut here ]------------\n[ 3959.023891] alloc_tag was not cleared (got tag for lib/xarray.c:378)\n[ 3959.023947] WARNING: ./include/linux/alloc_tag.h:155 at alloc_tag_add+0x128/0x178, CPU#6: mkfs.ntfs/113998\n[ 3959.023978] Modules linked in: dns_resolver tun brd overlay exfat btrfs blake2b libblake2b xor xor_neon raid6_pq loop sctp ip6_udp_tunnel udp_tunnel ext4 crc16 mbcache jbd2 rfkill sunrpc vfat fat sg fuse nfnetlink sr_mod virtio_gpu cdrom drm_client_lib virtio_dma_buf drm_shmem_helper drm_kms_helper ghash_ce drm sm4 backlight virtio_net net_failover virtio_scsi failover virtio_console virtio_blk virtio_mmio dm_mirror dm_region_hash dm_log dm_multipath dm_mod i2c_dev aes_neon_bs aes_ce_blk [last unloaded: hwpoison_inject]\n[ 3959.024170] CPU: 6 UID: 0 PID: 113998 Comm: mkfs.ntfs Kdump: loaded Tainted: G        W           6.19.0-rc7+ #7 PREEMPT(voluntary)\n[ 3959.024182] Tainted: [W]=WARN\n[ 3959.024186] Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022\n[ 3959.024192] pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ 3959.024199] pc : alloc_tag_add+0x128/0x178\n[ 3959.024207] lr : alloc_tag_add+0x128/0x178\n[ 3959.024214] sp : ffff80008b696d60\n[ 3959.024219] x29: ffff80008b696d60 x28: 0000000000000000 x27: 0000000000000240\n[ 3959.024232] x26: 0000000000000000 x25: 0000000000000240 x24: ffff800085d17860\n[ 3959.024245] x23: 0000000000402800 x22: ffff0000c0012dc0 x21: 00000000000002d0\n[ 3959.024257] x20: ffff0000e6ef3318 x19: ffff800085ae0410 x18: 0000000000000000\n[ 3959.024269] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000\n[ 3959.024281] x14: 0000000000000000 x13: 0000000000000001 x12: ffff600064101293\n[ 3959.024292] x11: 1fffe00064101292 x10: ffff600064101292 x9 : dfff800000000000\n[ 3959.024305] x8 : 00009fff9befed6e x7 : ffff000320809493 x6 : 0000000000000001\n[ 3959.024316] x5 : ffff000320809490 x4 : ffff600064101293 x3 : ffff800080691838\n[ 3959.024328] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000d5bcd640\n[ 3959.024340] Call trace:\n[ 3959.024346]  alloc_tag_add+0x128/0x178 (P)\n[ 3959.024355]  __alloc_tagging_slab_alloc_hook+0x11c/0x1a8\n[ 3959.024362]  kmem_cache_alloc_lru_noprof+0x1b8/0x5e8\n[ 3959.024369]  xas_alloc+0x304/0x4f0\n[ 3959.024381]  xas_create+0x1e0/0x4a0\n[ 3959.024388]  xas_store+0x68/0xda8\n[ 3959.024395]  __filemap_add_folio+0x5b0/0xbd8\n[ 3959.024409]  filemap_add_folio+0x16c/0x7e0\n[ 3959.024416]  __filemap_get_folio_mpol+0x2dc/0x9e8\n[ 3959.024424]  iomap_get_folio+0xfc/0x180\n[ 3959.024435]  __iomap_get_folio+0x2f8/0x4b8\n[ 3959.024441]  iomap_write_begin+0x198/0xc18\n[ 3959.024448]  iomap_write_iter+0x2ec/0x8f8\n[ 3959.024454]  iomap_file_buffered_write+0x19c/0x290\n[ 3959.024461]  blkdev_write_iter+0x38c/0x978\n[ 3959.024470]  vfs_write+0x4d4/0x928\n[ 3959.024482]  ksys_write+0xfc/0x1f8\n[ 3959.024489]  __arm64_sys_write+0x74/0xb0\n[ 3959.024496]  invoke_syscall+0xd4/0x258\n[ 3959.024507]  el0_svc_common.constprop.0+0xb4/0x240\n[ 3959.024514]  do_el0_svc+0x48/0x68\n[ 3959.024520]  el0_svc+0x40/0xf8\n[ 3959.024526]  el0t_64_sync_handler+0xa0/0xe8\n[ 3959.024533]  el0t_64_sync+0x1ac/0x1b0\n[ 3959.024540] ---[ end trace 0000000000000000 ]---\n\nWhen __memcg_slab_post_alloc_hook() fails, there are two different\nfree paths depending on whether size == 1 or size != 1. In the\nkmem_cache_free_bulk() path, we do call alloc_tagging_slab_free_hook().\nHowever, in memcg_alloc_abort_single() we don't, the above warning will be\ntriggered on the next allocation.\n\nTherefore, add alloc_tagging_slab_free_hook() to the\nmemcg_alloc_abort_single() path."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmm/slab: Añadir alloc_tagging_slab_free_hook para memcg_alloc_abort_single\n\nCuando CONFIG_MEM_ALLOC_PROFILING_DEBUG está habilitado, la siguiente advertencia puede ser notada:\n\n[ 3959.023862] ------------[ cut here ]------------\n[ 3959.023891] alloc_tag no fue limpiado (obtuvo etiqueta para lib/xarray.c:378)\n[ 3959.023947] ADVERTENCIA: ./include/linux/alloc_tag.h:155 en alloc_tag_add+0x128/0x178, CPU#6: mkfs.ntfs/113998\n[ 3959.023978] Módulos enlazados: dns_resolver tun brd overlay exfat btrfs blake2b libblake2b xor xor_neon raid6_pq loop sctp ip6_udp_tunnel udp_tunnel ext4 crc16 mbcache jbd2 rfkill sunrpc vfat fat sg fuse nfnetlink sr_mod virtio_gpu cdrom drm_client_lib virtio_dma_buf drm_shmem_helper drm_kms_helper ghash_ce drm sm4 backlight virtio_net net_failover virtio_scsi failover virtio_console virtio_blk virtio_mmio dm_mirror dm_region_hash dm_log dm_multipath dm_mod i2c_dev aes_neon_bs aes_ce_blk [último descargado: hwpoison_inject]\n[ 3959.024170] CPU: 6 UID: 0 PID: 113998 Comm: mkfs.ntfs Kdump: cargado Tainted: G W 6.19.0-rc7+ #7 PREEMPT(voluntary)\n[ 3959.024182] Tainted: [W]=WARN\n[ 3959.024186] Nombre del hardware: Máquina virtual QEMU KVM, BIOS desconocido 2/2/2022\n[ 3959.024192] pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ 3959.024199] pc : alloc_tag_add+0x128/0x178\n[ 3959.024207] lr : alloc_tag_add+0x128/0x178\n[ 3959.024214] sp : ffff80008b696d60\n[ 3959.024219] x29: ffff80008b696d60 x28: 0000000000000000 x27: 0000000000000240\n[ 3959.024232] x26: 0000000000000000 x25: 0000000000000240 x24: ffff800085d17860\n[ 3959.024245] x23: 0000000000402800 x22: ffff0000c0012dc0 x21: 00000000000002d0\n[ 3959.024257] x20: ffff0000e6ef3318 x19: ffff800085ae0410 x18: 0000000000000000\n[ 3959.024269] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000\n[ 3959.024281] x14: 0000000000000000 x13: 0000000000000001 x12: ffff600064101293\n[ 3959.024292] x11: 1fffe00064101292 x10: ffff600064101292 x9 : dfff800000000000\n[ 3959.024305] x8 : 00009fff9befed6e x7 : ffff000320809493 x6 : 0000000000000001\n[ 3959.024316] x5 : ffff000320809490 x4 : ffff600064101293 x3 : ffff800080691838\n[ 3959.024328] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000d5bcd640\n[ 3959.024340] Traza de llamada:\n[ 3959.024346] alloc_tag_add+0x128/0x178 (P)\n[ 3959.024355] __alloc_tagging_slab_alloc_hook+0x11c/0x1a8\n[ 3959.024362] kmem_cache_alloc_lru_noprof+0x1b8/0x5e8\n[ 3959.024369] xas_alloc+0x304/0x4f0\n[ 3959.024381] xas_create+0x1e0/0x4a0\n[ 3959.024388] xas_store+0x68/0xda8\n[ 3959.024395] __filemap_add_folio+0x5b0/0xbd8\n[ 3959.024409] filemap_add_folio+0x16c/0x7e0\n[ 3959.024416] __filemap_get_folio_mpol+0x2dc/0x9e8\n[ 3959.024424] iomap_get_folio+0xfc/0x180\n[ 3959.024435] __iomap_get_folio+0x2f8/0x4b8\n[ 3959.024441] iomap_write_begin+0x198/0xc18\n[ 3959.024448] iomap_write_iter+0x2ec/0x8f8\n[ 3959.024454] iomap_file_buffered_write+0x19c/0x290\n[ 3959.024461] blkdev_write_iter+0x38c/0x978\n[ 3959.024470] vfs_write+0x4d4/0x928\n[ 3959.024482] ksys_write+0xfc/0x1f8\n[ 3959.024489] __arm64_sys_write+0x74/0xb0\n[ 3959.024496] invoke_syscall+0xd4/0x258\n[ 3959.024507] el0_svc_common.constprop.0+0xb4/0x240\n[ 3959.024514] do_el0_svc+0x48/0x68\n[ 3959.024520] el0_svc+0x40/0xf8\n[ 3959.024526] el0t_64_sync_handler+0xa0/0xe8\n[ 3959.024533] el0t_64_sync+0x1ac/0x1b0\n[ 3959.024540] ---[ fin de traza 0000000000000000 ]---\n\nCuando __memcg_slab_post_alloc_hook() falla, hay dos rutas de liberación diferentes dependiendo de si size == 1 o size != 1. En la ruta de kmem_cache_free_bulk(), sí llamamos a alloc_tagging_slab_free_hook(). Sin embargo, en memcg_alloc_abort_single() no lo hacemos, la advertencia anterior se activará en la siguiente asignación.\n\nPor lo tanto, añadir alloc_tagging_slab_free_hook() a la ruta de memcg_alloc_abort_single()."
    }
  ],
  "lastModified": "2026-06-17T10:21:07.450",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "ADF10DC5-1EB2-441D-95B1-00E8C9E65669",
              "versionEndExcluding": "6.12.70",
              "versionStartIncluding": "6.10"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7156C23F-009E-4D05-838C-A2DA417B5B8D",
              "versionEndExcluding": "6.18.10",
              "versionStartIncluding": "6.13"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3EF854A1-ABB1-4E93-BE9A-44569EC76C0D"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EB5B7DFC-C36B-45D8-922C-877569FDDF43"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}