Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-23219— mm/slab: Add alloc_tagging_slab_free_hook for memcg_alloc_abort_single

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于缺少alloc_tagging_slab_free_hook，可能导致内存分配标签未清除。

EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 9f9796b413d3c417f34cae427c4e47bfdd3a7454< b8bc72587c79fe52c14732e16a766b6eded00707 affected
9f9796b413d3c417f34cae427c4e47bfdd3a7454< e8af57e090790983591f6927b3d89ee6383f8c1e affected
9f9796b413d3c417f34cae427c4e47bfdd3a7454< e6c53ead2d8fa73206e0a63e9cd9aea6bc929837 affected
6.10 affected
< 6.10 unaffected
6.12.70≤ 6.12.* unaffected
6.18.10≤ 6.18.* unaffected
6.19≤ * unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-23219

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
mm/slab: Add alloc_tagging_slab_free_hook for memcg_alloc_abort_single
Source: CVE Program / CVE List V5
Vulnerability 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+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 ]--- 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于缺少alloc_tagging_slab_free_hook，可能导致内存分配标签未清除。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 9f9796b413d3c417f34cae427c4e47bfdd3a7454 ~ b8bc72587c79fe52c14732e16a766b6eded00707 -
Linux Linux 6.10 -

II. Public POCs for CVE-2026-23219

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-23219

请登录查看更多情报信息。

Same Patch Batch · Linux · 2026-02-18 · 31 CVEs total

CVE-2025-71234 8.8 HIGH wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add
CVE-2026-23230 8.8 HIGH smb: client: split cached_fid bitfields to avoid shared-byte RMW races
CVE-2026-23226 8.8 HIGH ksmbd: add chann_lock to protect ksmbd_chann_list xarray
CVE-2026-23227 7.8 HIGH drm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to
CVE-2026-23225 7.8 HIGH sched/mmcid: Don't assume CID is CPU owned on mode switch
CVE-2026-23224 7.8 HIGH erofs: fix UAF issue for file-backed mounts w/ directio option
CVE-2026-23222 7.8 HIGH crypto: omap - Allocate OMAP_CRYPTO_FORCE_COPY scatterlists correctly
CVE-2025-71236 7.5 HIGH scsi: qla2xxx: Validate sp before freeing associated memory
CVE-2025-71235 scsi: qla2xxx: Delay module unload while fabric scan in progress
CVE-2026-23212 bonding: annotate data-races around slave->last_rx
CVE-2026-23229 crypto: virtio - Add spinlock protection with virtqueue notification
CVE-2026-23228 smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()
CVE-2025-71225 md: suspend array while updating raid_disks via sysfs
CVE-2026-23223 xfs: fix UAF in xchk_btree_check_block_owner
CVE-2026-23221 bus: fsl-mc: fix use-after-free in driver_override_show()
CVE-2026-23220 ksmbd: fix infinite loop caused by next_smb2_rcv_hdr_off reset in error paths
CVE-2025-71237 nilfs2: Fix potential block overflow that cause system hang
CVE-2025-71227 wifi: mac80211: don't WARN for connections on invalid channels
CVE-2026-23211 mm, swap: restore swap_space attr aviod kernel panic
CVE-2025-71233 PCI: endpoint: Avoid creating sub-groups asynchronously

Showing top 20 of 31 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23219

No comments yet

Leave a comment