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CVE-2026-72223— nvdimm/btt: Free arena sub-allocations on discover_arenas() error path

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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于discover_arenas()错误路径上未释放btt_freelist_init()、btt_rtt_init()和btt_maplocks_init()分配的内存，可能导致内存泄漏。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 5212e11fde4d40fa627668b4f2222d20db488f71< 2d0364937550a7b3e2592629c2a68753ac020b28 affected
5212e11fde4d40fa627668b4f2222d20db488f71< eeb95774bc79268e2b78ebf01d8781560b5bd671 affected
5212e11fde4d40fa627668b4f2222d20db488f71< 7563f69caa9143a491d5f26e563255c734751545 affected
5212e11fde4d40fa627668b4f2222d20db488f71< 0b0d9404951aacc9717aa61e77af4a6e9e8f8249 affected
5212e11fde4d40fa627668b4f2222d20db488f71< 873ced7f345e99f7ee16f9ff226515580332ecc4 affected
5212e11fde4d40fa627668b4f2222d20db488f71< 30d490bb2c4cd220e7dedf862ab6a09eb5dcbad5 affected
5212e11fde4d40fa627668b4f2222d20db488f71< ba59b96d8d21dc8729fca44a022ca5919c1848c9 affected
5212e11fde4d40fa627668b4f2222d20db488f71< 13fe4cd9ddd0aacb7777812328be525a11ea3fea affected
… +10 more rows
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I. Basic Information for CVE-2026-72223

Vulnerability Information
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Vulnerability Title
nvdimm/btt: Free arena sub-allocations on discover_arenas() error path
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nvdimm/btt: Free arena sub-allocations on discover_arenas() error path Memory allocated by btt_freelist_init(), btt_rtt_init(), and btt_maplocks_init() is not freed on some discover_arenas() error paths. This leaks memory when arena discovery fails. Add the missing kfree() calls to release the allocations before returning an error. [ as: commit message and log edits ]
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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于discover_arenas()错误路径上未释放btt_freelist_init()、btt_rtt_init()和btt_maplocks_init()分配的内存，可能导致内存泄漏。
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 5212e11fde4d40fa627668b4f2222d20db488f71 ~ 2d0364937550a7b3e2592629c2a68753ac020b28 -
Linux Linux 4.2 -

II. Public POCs for CVE-2026-72223

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III. Intelligence Information for CVE-2026-72223

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Patches & Fixes for CVE-2026-72223 (8)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72201 9.8 CRITICAL ntfs: validate index entries on reading
CVE-2026-74268 9.8 CRITICAL tcp: clear sock_ops cb flags before force-closing a child socket
CVE-2026-72065 9.8 CRITICAL net: mana: Validate the packet length reported by the NIC
CVE-2026-72064 9.8 CRITICAL net: mana: Sync page pool RX frags for CPU
CVE-2026-74478 9.8 CRITICAL um: vector: fix use-after-free in vector_mmsg_rx()
CVE-2026-72191 9.8 CRITICAL ntfs3: validate split-point offset in indx_insert_into_buffer
CVE-2026-72192 9.8 CRITICAL ntfs3: bound to_move in indx_insert_into_root before hdr_insert_head
CVE-2026-74269 9.8 CRITICAL bnxt: fix head underflow on XDP head-grow
CVE-2026-72194 9.8 CRITICAL fs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow
CVE-2026-72209 9.8 CRITICAL ntfs: validate attribute values on lookup
CVE-2026-72211 9.8 CRITICAL ntfs: grow index root value before reparent header update
CVE-2026-72210 9.8 CRITICAL ntfs: fix off-by-one in mapping pairs decoding bounds checks

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-72223

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