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CVE-2026-74455— can: peak_usb: validate uCAN receive record lengths

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 4.0版本存在安全漏洞，该漏洞源于pcan_usb_fd_decode_buf()函数在解析USB接收缓冲区中的uCAN记录时未验证记录长度，可能导致越界读取。

AI Predicted 7.8 Difficulty: Hard EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 0a25e1f4f18566b750ebd3ae995af64e23111e63< 276d989cd2dd88e2b7ab2c96fd10c86836b12781 affected
0a25e1f4f18566b750ebd3ae995af64e23111e63< bf9d787b7e1ef59be19b35abca08194772deb97e affected
0a25e1f4f18566b750ebd3ae995af64e23111e63< 89c92a8052698dbbd3652a77c04d02bbd74a3275 affected
0a25e1f4f18566b750ebd3ae995af64e23111e63< 6067c878e38d02a3d5c43497347e143f85c9064a affected
0a25e1f4f18566b750ebd3ae995af64e23111e63< 2c8f08f3641a074da40acf05baa5a18ae2739260 affected
0a25e1f4f18566b750ebd3ae995af64e23111e63< 2427ef427bdd78d862c7c76597bfd9eda88b81f1 affected
0a25e1f4f18566b750ebd3ae995af64e23111e63< d9c115948c3dd5fcc2d0245cec5eb76c098503c8 affected
0a25e1f4f18566b750ebd3ae995af64e23111e63< 93fcab2c6968446316bbb49548848df604d6346f affected
… +10 more rows
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I. Basic Information for CVE-2026-74455

Vulnerability Information
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Vulnerability Title
can: peak_usb: validate uCAN receive record lengths
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: validate uCAN receive record lengths pcan_usb_fd_decode_buf() walks uCAN records packed in one USB receive buffer. Require each record to contain the fixed header for its type, and verify CAN payload bytes before copying them into the skb.
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 4.0版本存在安全漏洞，该漏洞源于pcan_usb_fd_decode_buf()函数在解析USB接收缓冲区中的uCAN记录时未验证记录长度，可能导致越界读取。
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 0a25e1f4f18566b750ebd3ae995af64e23111e63 ~ 276d989cd2dd88e2b7ab2c96fd10c86836b12781 -
Linux Linux 4.0 -

II. Public POCs for CVE-2026-74455

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III. Intelligence Information for CVE-2026-74455

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Patches & Fixes for CVE-2026-74455 (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-2026-74455

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