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CVE-2026-72140— i2c: mlxbf: Fix use-after-free in mlxbf_i2c_init_resource()

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，该漏洞源于在mlxbf_i2c_init_resource()函数中，当devm_platform_get_and_ioremap_resource()返回错误时，在读取错误码前释放了tmp_res，导致释放后重用。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux b5b5b32081cd206baa6e58cca7f112d9723785d6< 6a108c9f5a81bb7b29dbb1398be0089655b6bfd2 affected
b5b5b32081cd206baa6e58cca7f112d9723785d6< c4d9b6a0c9645366d9e4af8a6ac8347bd4c841aa affected
b5b5b32081cd206baa6e58cca7f112d9723785d6< b398cbbbb9dd76210682a8c9aabd34c5168800b9 affected
b5b5b32081cd206baa6e58cca7f112d9723785d6< 5290a52533e09c38374963f4bb0b35121fe555c7 affected
b5b5b32081cd206baa6e58cca7f112d9723785d6< ce960a1b2caa4ad08291f28d8bcf17ad5a864e54 affected
b5b5b32081cd206baa6e58cca7f112d9723785d6< e6a395a71f4652261d09b572a03c96052662a056 affected
b5b5b32081cd206baa6e58cca7f112d9723785d6< fb267770bf822064f510c9b46743f533d8fa8a5f affected
b5b5b32081cd206baa6e58cca7f112d9723785d6< 71356737a7a55c76fee847563e3d33f8e6dc6b6d affected
… +10 more rows
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I. Basic Information for CVE-2026-72140

Vulnerability Information
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Vulnerability Title
i2c: mlxbf: Fix use-after-free in mlxbf_i2c_init_resource()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: i2c: mlxbf: Fix use-after-free in mlxbf_i2c_init_resource() If devm_platform_get_and_ioremap_resource() returns an error, mlxbf_i2c_init_resource() frees tmp_res before reading tmp_res->io to get the error code. This results in a use-after-free. Save the error code before freeing tmp_res.
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，该漏洞源于在mlxbf_i2c_init_resource()函数中，当devm_platform_get_and_ioremap_resource()返回错误时，在读取错误码前释放了tmp_res，导致释放后重用。
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 b5b5b32081cd206baa6e58cca7f112d9723785d6 ~ 6a108c9f5a81bb7b29dbb1398be0089655b6bfd2 -
Linux Linux 5.10 -

II. Public POCs for CVE-2026-72140

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III. Intelligence Information for CVE-2026-72140

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Patches & Fixes for CVE-2026-72140 (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-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
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-2026-72065 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-2026-74480 9.8 CRITICAL net: bridge: stop fast-leave after deleting a port group
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-2026-74478 9.8 CRITICAL um: vector: fix use-after-free in vector_mmsg_rx()
CVE-2026-72194 9.8 CRITICAL fs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow
CVE-2026-74269 9.8 CRITICAL bnxt: fix head underflow on XDP head-grow
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-2026-72140

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