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CVE-2022-50876— usb: musb: Fix musb_gadget.c rxstate overflow bug

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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于长度检查不足，可能导致缓冲区溢出。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 03840fad004ce8a56bc8b3bb60a2df10f6f9481e< 826f84ab04a5cafe484ea9c2c85a3930068e5cb7 affected
03840fad004ce8a56bc8b3bb60a2df10f6f9481e< a1008c8b9f357691ce6a8fdb8f157aecb2d79167 affected
03840fad004ce8a56bc8b3bb60a2df10f6f9481e< 7c80f3a918ba9aa26fb699ee887064ec3af0396a affected
03840fad004ce8a56bc8b3bb60a2df10f6f9481e< d6afcab1b48f4051211c50145b9e91be3b1b42c9 affected
03840fad004ce8a56bc8b3bb60a2df10f6f9481e< acf0006f2b2b2ca672988875fd154429aafb2a9b affected
03840fad004ce8a56bc8b3bb60a2df10f6f9481e< 3c84c7f592c4ba38f54ddaddd0115acc443025db affected
03840fad004ce8a56bc8b3bb60a2df10f6f9481e< a9ccd2ab1becf5dcb6d57e9fcd981f5eaa606c96 affected
03840fad004ce8a56bc8b3bb60a2df10f6f9481e< 523313881f0aa5cbbdb548ce575b6e58b202bd76 affected
… +12 more rows
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I. Basic Information for CVE-2022-50876

Vulnerability Information
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Vulnerability Title
usb: musb: Fix musb_gadget.c rxstate overflow bug
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: musb: Fix musb_gadget.c rxstate overflow bug The usb function device call musb_gadget_queue() adds the passed request to musb_ep::req_list,If the (request->length > musb_ep->packet_sz) and (is_buffer_mapped(req) return false),the rxstate() will copy all data in fifo to request->buf which may cause request->buf out of bounds. Fix it by add the length check : fifocnt = min_t(unsigned, request->length - request->actual, fifocnt);
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于长度检查不足，可能导致缓冲区溢出。
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 03840fad004ce8a56bc8b3bb60a2df10f6f9481e ~ 826f84ab04a5cafe484ea9c2c85a3930068e5cb7 -
Linux Linux 4.3 -

II. Public POCs for CVE-2022-50876

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III. Intelligence Information for CVE-2022-50876

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Other References for CVE-2022-50876 (9)

Same Patch Batch · Linux · 2025-12-30 · 244 CVEs total

CVE-2023-54184 9.8 CRITICAL scsi: target: iscsit: Free cmds before session free
CVE-2023-54223 9.8 CRITICAL net/mlx5e: xsk: Fix invalid buffer access for legacy rq
CVE-2023-54237 9.8 CRITICAL net/smc: fix potential panic dues to unprotected smc_llc_srv_add_link()
CVE-2023-54257 9.8 CRITICAL net: macb: fix a memory corruption in extended buffer descriptor mode
CVE-2023-54258 9.8 CRITICAL cifs: fix potential oops in cifs_oplock_break
CVE-2023-54269 9.8 CRITICAL SUNRPC: double free xprt_ctxt while still in use
CVE-2023-54280 9.8 CRITICAL cifs: fix potential race when tree connecting ipc
CVE-2023-54292 9.8 CRITICAL RDMA/irdma: Fix data race on CQP request done
CVE-2023-54203 9.1 CRITICAL ksmbd: fix slab-out-of-bounds in init_smb2_rsp_hdr
CVE-2022-50880 8.8 HIGH wifi: ath10k: add peer map clean up for peer delete in ath10k_sta_state()
CVE-2023-54262 8.8 HIGH net/mlx5e: Don't clone flow post action attributes second time
CVE-2023-54214 8.8 HIGH Bluetooth: L2CAP: Fix potential user-after-free
CVE-2023-54162 8.8 HIGH ksmbd: fix possible memory leak in smb2_lock()
CVE-2023-54318 8.8 HIGH net/smc: use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add
CVE-2023-54250 8.2 HIGH ksmbd: avoid out of bounds access in decode_preauth_ctxt()
CVE-2023-54164 8.0 HIGH Bluetooth: ISO: fix iso_conn related locking and validity issues
CVE-2023-54206 7.8 HIGH net/sched: flower: fix filter idr initialization
CVE-2023-54202 7.8 HIGH drm/i915: fix race condition UAF in i915_perf_add_config_ioctl
CVE-2023-54210 7.8 HIGH Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()
CVE-2023-54243 7.8 HIGH netfilter: ebtables: fix table blob use-after-free

Showing top 20 of 244 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50876

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