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CVE-2026-74457— can: peak_usb: add bounds check for USB channel index

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 3.4版本存在安全漏洞，该漏洞源于USB通道索引缺少边界检查，可能导致堆越界读取，最终导致内核崩溃。

AI Predicted 8.1 Difficulty: Moderate EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux d8a199355f8f8a0797c00d98788d7282c9ea38bd< 18b1a868a2cda66fb438007ba47ce5f2484db381 affected
d8a199355f8f8a0797c00d98788d7282c9ea38bd< 0c9268457bd6e4058fe55b4db01b16661c2eacf5 affected
d8a199355f8f8a0797c00d98788d7282c9ea38bd< 94fb6fe83ce152532b11b36730b30f3dc0c94217 affected
d8a199355f8f8a0797c00d98788d7282c9ea38bd< 825c903ca3c98cd0cf0e3de8ab8f2604a5339b3f affected
d8a199355f8f8a0797c00d98788d7282c9ea38bd< f97b7e5e1cdaae15cd95b3a360028c7929664969 affected
d8a199355f8f8a0797c00d98788d7282c9ea38bd< 1acab790b7cecd4e144d1d18bdfe549e282f6b0b affected
d8a199355f8f8a0797c00d98788d7282c9ea38bd< 0149fdb50a30944827acf9600a2cc44de0325a7f affected
d8a199355f8f8a0797c00d98788d7282c9ea38bd< 39132f166ca8ce00ae60d8a9068e06a60943cc4b affected
… +10 more rows
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I. Basic Information for CVE-2026-74457

Vulnerability Information
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Vulnerability Title
can: peak_usb: add bounds check for USB channel index
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: add bounds check for USB channel index The channel control index ctrl_idx is derived from rx->len which comes directly from a device USB payload. The mask 0x0f allows values 0-15, but the array size of usb_if->dev[] is only 2. Values 2-15 cause heap out-of-bounds read, eventually causing kernel panic in the IRQ context. Add bounds checking for ctrl_idx before the array access in both pcan_usb_pro_handle_canmsg() and pcan_usb_pro_handle_error().
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 3.4版本存在安全漏洞，该漏洞源于USB通道索引缺少边界检查，可能导致堆越界读取，最终导致内核崩溃。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux d8a199355f8f8a0797c00d98788d7282c9ea38bd ~ 18b1a868a2cda66fb438007ba47ce5f2484db381 -
Linux Linux 3.4 -

II. Public POCs for CVE-2026-74457

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III. Intelligence Information for CVE-2026-74457

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Patches & Fixes for CVE-2026-74457 (8)

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

CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
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-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
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-2026-72339 9.8 CRITICAL qede: fix off-by-one in BD ring consumption on build_skb failure
CVE-2026-72234 9.8 CRITICAL batman-adv: access unicast_ttvn skb->data only after skb realloc
CVE-2026-74376 9.8 CRITICAL md/raid10: reset read_slot when reusing r10bio for discard
CVE-2026-74255 9.8 CRITICAL tipc: fix UAF in tipc_l2_send_msg()
CVE-2026-72064 9.8 CRITICAL net: mana: Sync page pool RX frags for CPU
CVE-2026-72065 9.8 CRITICAL net: mana: Validate the packet length reported by the NIC
CVE-2026-72217 9.8 CRITICAL SUNRPC: Bound-check xdr_buf_to_bvec() stores before writing
CVE-2026-74473 9.8 CRITICAL vxlan: use pskb_network_may_pull() in route_shortcircuit()
CVE-2026-72323 9.8 CRITICAL ipv4: igmp: Fix potential UAF in igmp_gq_start_timer()
CVE-2026-74495 9.8 CRITICAL igbvf: Fix leak in TX DMA error cleanup
CVE-2026-72463 9.8 CRITICAL xfrm: Fix dev use-after-free in xfrm async resumption
CVE-2026-72069 9.8 CRITICAL locking/rt: Fix the incorrect RCU protection in rt_spin_unlock()

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-2026-74457

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