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CVE-2026-68369— usb: gadget: printer: fix infinite loop in printer_read()

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 4.1版本存在安全漏洞，该漏洞源于printer_read()函数将请求复制大小与实际复制字节数使用同一变量，当copy_to_user复制失败时读取循环无限重复，可能导致拒绝服务。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux b185f01a9ab7af586133be2555298e960237359b< 3f81197364b57e5318620c75f3bd63f405f60552 affected
b185f01a9ab7af586133be2555298e960237359b< e225e2998e5a9b83c838dbbe4511fb0d63f88daf affected
b185f01a9ab7af586133be2555298e960237359b< 3081b0e187065c3b9577e393ad664b12854aeaf3 affected
b185f01a9ab7af586133be2555298e960237359b< 994afccfdcceb73be33f69a8a8ea71e260c9eca5 affected
b185f01a9ab7af586133be2555298e960237359b< e03597ad9494b500344076589aeaa6c6d2d381d3 affected
b185f01a9ab7af586133be2555298e960237359b< 4cde0b38cc0cb8b7dc17295801015148de37d1d2 affected
b185f01a9ab7af586133be2555298e960237359b< e41bbbbb1740ce4d7270ab1cdeca13892d6a8d2e affected
b185f01a9ab7af586133be2555298e960237359b< c2e819be6a5c7f34344926b4bd7e3dfca58cf48a affected
… +10 more rows
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I. Basic Information for CVE-2026-68369

Vulnerability Information
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Vulnerability Title
usb: gadget: printer: fix infinite loop in printer_read()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: printer: fix infinite loop in printer_read() printer_read() uses the same variable for the requested copy size and the number of bytes actually copied to user space. copy_to_user() returns the number of bytes not copied, so when it fails to copy anything, the computed copied length becomes zero. In that case len, buf, current_rx_bytes and current_rx_buf are left unchanged. If RX data is available and the user buffer remains unwritable, the read loop can repeat indefinitely. Track the copied length separately and return -EFAULT, or the number of bytes already copied, if an iteration makes no progress.
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 4.1版本存在安全漏洞，该漏洞源于printer_read()函数将请求复制大小与实际复制字节数使用同一变量，当copy_to_user复制失败时读取循环无限重复，可能导致拒绝服务。
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 b185f01a9ab7af586133be2555298e960237359b ~ 3f81197364b57e5318620c75f3bd63f405f60552 -
Linux Linux 4.1 -

II. Public POCs for CVE-2026-68369

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III. Intelligence Information for CVE-2026-68369

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Patches & Fixes for CVE-2026-68369 (6)

Same Patch Batch · Linux · 2026-08-10 · 344 CVEs total

CVE-2026-68117 9.8 CRITICAL tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-68161 9.8 CRITICAL sctp: close UDP tunnel sockets during netns teardown
CVE-2026-68160 9.8 CRITICAL ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-68123 9.8 CRITICAL openvswitch: fix GSO userspace truncation underflow
CVE-2026-68302 9.8 CRITICAL amt: re-read skb header pointers after every pull
CVE-2026-68381 9.8 CRITICAL ksmbd: pin conn during async oplock break notification
CVE-2026-68385 9.8 CRITICAL s390/checksum: Fix csum_partial() without vector facility
CVE-2026-68159 9.8 CRITICAL libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
CVE-2026-68127 9.8 CRITICAL ila: reload IPv6 header after pskb_may_pull in checksum adjust
CVE-2026-68388 9.8 CRITICAL smb/client: handle overlapping allocated ranges in fallocate
CVE-2026-68144 9.8 CRITICAL phonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-68137 9.8 CRITICAL net/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-68136 9.8 CRITICAL net: gro: fix double aggregation of flush-marked skbs
CVE-2026-68170 9.8 CRITICAL mptcp: fix stale skb->sk reference on subflow close
CVE-2026-68426 9.8 CRITICAL xfrm: fix stale skb->prev after async crypto steals a GSO segment
CVE-2026-68156 9.8 CRITICAL libceph: refresh auth->authorizer_buf{,_len} after authorizer update
CVE-2026-68158 9.8 CRITICAL libceph: Fix multiplication overflow in decode_new_up_state_weight()
CVE-2026-68300 9.8 CRITICAL sctp: auth: verify auth requirement when auth_chunk is NULL
CVE-2026-68154 9.8 CRITICAL libceph: reject zero bucket types in crush_decode
CVE-2026-68124 9.6 CRITICAL mctp: serial: handle zero-length frames to prevent rx buffer overflow

Showing top 20 of 344 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68369

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