{
  "cveId": "CVE-2026-23219",
  "url": "https://patchblox.com/security/cve/CVE-2026-23219",
  "summary": "CVE-2026-23219 is fixed in 58 products on 1 platform, first by DEBIAN-CVE-2026-23219, released February 18, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  mm/slab: Add alloc_tagging_slab_free_hook for me...",
  "description": "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:  [ 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\u002B0x128/0x178, 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\u002B #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 \u002BPAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 3959.024199] pc : alloc_tag_add\u002B0x128/0x178 [ 3959.024207] lr : alloc_tag_add\u002B0x128/0x178 [ 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\u002B0x128/0x178 (P) [ 3959.024355]  __alloc_tagging_slab_alloc_hook\u002B0x11c/0x1a8 [ 3959.024362]  kmem_cache_alloc_lru_noprof\u002B0x1b8/0x5e8 [ 3959.024369]  xas_alloc\u002B0x304/0x4f0 [ 3959.024381]  xas_create\u002B0x1e0/0x4a0 [ 3959.024388]  xas_store\u002B0x68/0xda8 [ 3959.024395]  __filemap_add_folio\u002B0x5b0/0xbd8 [ 3959.024409]  filemap_add_folio\u002B0x16c/0x7e0 [ 3959.024416]  __filemap_get_folio_mpol\u002B0x2dc/0x9e8 [ 3959.024424]  iomap_get_folio\u002B0xfc/0x180 [ 3959.024435]  __iomap_get_folio\u002B0x2f8/0x4b8 [ 3959.024441]  iomap_write_begin\u002B0x198/0xc18 [ 3959.024448]  iomap_write_iter\u002B0x2ec/0x8f8 [ 3959.024454]  iomap_file_buffered_write\u002B0x19c/0x290 [ 3959.024461]  blkdev_write_iter\u002B0x38c/0x978 [ 3959.024470]  vfs_write\u002B0x4d4/0x928 [ 3959.024482]  ksys_write\u002B0xfc/0x1f8 [ 3959.024489]  __arm64_sys_write\u002B0x74/0xb0 [ 3959.024496]  invoke_syscall\u002B0xd4/0x258 [ 3959.024507]  el0_svc_common.constprop.0\u002B0xb4/0x240 [ 3959.024514]  do_el0_svc\u002B0x48/0x68 [ 3959.024520]  el0_svc\u002B0x40/0xf8 [ 3959.024526]  el0t_64_sync_handler\u002B0xa0/0xe8 [ 3959.024533]  el0t_64_sync\u002B0x1ac/0x1b0 [ 3959.024540] ---[ end trace 0000000000000000 ]---  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\u0027t, the above warning will be triggered on the next allocation.  Therefore, add alloc_tagging_slab_free_hook() to the memcg_alloc_abort_single() path.",
  "published": "2026-02-18T15:18:43Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00131,
  "epssPercentile": 0.02694,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
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