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CVE-2026-23211— mm, swap: restore swap_space attr aviod kernel panic

AI Predicted 5.5 Difficulty: Hard EPSS 0.10% · P1

Possible ATT&CK Techniques 1AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 6

VendorProductVersion RangeStatus
LinuxLinux8b47299a411a178d572aaac31ff7ab33a8bd27e2< b0020cbd26380177b9fb8b7e75a8f7bdba79db20affected
8b47299a411a178d572aaac31ff7ab33a8bd27e2< a0f3c0845a4ff68d403c568266d17e9cc553e561affected
6.18affected
< 6.18unaffected
6.18.9≤ 6.18.*unaffected
6.19≤ *unaffected
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I. Basic Information for CVE-2026-23211

Vulnerability Information
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Vulnerability Title
mm, swap: restore swap_space attr aviod kernel panic
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mm, swap: restore swap_space attr aviod kernel panic commit 8b47299a411a ("mm, swap: mark swap address space ro and add context debug check") made the swap address space read-only. It may lead to kernel panic if arch_prepare_to_swap returns a failure under heavy memory pressure as follows, el1_abort+0x40/0x64 el1h_64_sync_handler+0x48/0xcc el1h_64_sync+0x84/0x88 errseq_set+0x4c/0xb8 (P) __filemap_set_wb_err+0x20/0xd0 shrink_folio_list+0xc20/0x11cc evict_folios+0x1520/0x1be4 try_to_shrink_lruvec+0x27c/0x3dc shrink_one+0x9c/0x228 shrink_node+0xb3c/0xeac do_try_to_free_pages+0x170/0x4f0 try_to_free_pages+0x334/0x534 __alloc_pages_direct_reclaim+0x90/0x158 __alloc_pages_slowpath+0x334/0x588 __alloc_frozen_pages_noprof+0x224/0x2fc __folio_alloc_noprof+0x14/0x64 vma_alloc_zeroed_movable_folio+0x34/0x44 do_pte_missing+0xad4/0x1040 handle_mm_fault+0x4a4/0x790 do_page_fault+0x288/0x5f8 do_translation_fault+0x38/0x54 do_mem_abort+0x54/0xa8 Restore swap address space as not ro to avoid the panic.
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swap地址空间被标记为只读，可能导致内核崩溃。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 8b47299a411a178d572aaac31ff7ab33a8bd27e2 ~ b0020cbd26380177b9fb8b7e75a8f7bdba79db20 -
LinuxLinux 6.18 -

II. Public POCs for CVE-2026-23211

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III. Intelligence Information for CVE-2026-23211

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

CVE-2025-712348.8 HIGHwifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add
CVE-2026-232308.8 HIGHsmb: client: split cached_fid bitfields to avoid shared-byte RMW races
CVE-2026-232268.8 HIGHksmbd: add chann_lock to protect ksmbd_chann_list xarray
CVE-2026-232277.8 HIGHdrm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to
CVE-2026-232257.8 HIGHsched/mmcid: Don't assume CID is CPU owned on mode switch
CVE-2026-232247.8 HIGHerofs: fix UAF issue for file-backed mounts w/ directio option
CVE-2026-232227.8 HIGHcrypto: omap - Allocate OMAP_CRYPTO_FORCE_COPY scatterlists correctly
CVE-2025-712367.5 HIGHscsi: qla2xxx: Validate sp before freeing associated memory
CVE-2025-71235scsi: qla2xxx: Delay module unload while fabric scan in progress
CVE-2025-71225md: suspend array while updating raid_disks via sysfs
CVE-2026-23229crypto: virtio - Add spinlock protection with virtqueue notification
CVE-2026-23228smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()
CVE-2025-71227wifi: mac80211: don't WARN for connections on invalid channels
CVE-2026-23223xfs: fix UAF in xchk_btree_check_block_owner
CVE-2026-23221bus: fsl-mc: fix use-after-free in driver_override_show()
CVE-2026-23220ksmbd: fix infinite loop caused by next_smb2_rcv_hdr_off reset in error paths
CVE-2025-71237nilfs2: Fix potential block overflow that cause system hang
CVE-2026-23213drm/amd/pm: Disable MMIO access during SMU Mode 1 reset
CVE-2026-23212bonding: annotate data-races around slave->last_rx
CVE-2025-71233PCI: 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-2026-23211

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