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CVE-2026-43223— media: pvrusb2: fix URB leak in pvr2_send_request_ex

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pvr2_send_request_ex函数中URB泄漏，可能导致提交仍处于活动状态的写URB。

AI Predicted 3.3 Difficulty: Hard EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux d855497edbfbf9e19a17f4a1154bca69cb4bd9ba< da524c939b1e5ba17f10db4bde4bdaf569ffcda6 affected
d855497edbfbf9e19a17f4a1154bca69cb4bd9ba< cf459d6ffa5e150ef3744b897f936ff24b52bd15 affected
d855497edbfbf9e19a17f4a1154bca69cb4bd9ba< 77a63f8efc434ddb04667ed632aade58301a2f13 affected
d855497edbfbf9e19a17f4a1154bca69cb4bd9ba< 4ba5c7a1aade7090172cbffd4d120bf4cf5ccbde affected
d855497edbfbf9e19a17f4a1154bca69cb4bd9ba< 58dd722b6c3debcddb4684fb256c90fee7f063e5 affected
d855497edbfbf9e19a17f4a1154bca69cb4bd9ba< 2011929f0e4cf6a0a34dd6205911b12276904453 affected
d855497edbfbf9e19a17f4a1154bca69cb4bd9ba< 5f3ac816861c3b8a5d1a3645b17dc3a99d668d94 affected
d855497edbfbf9e19a17f4a1154bca69cb4bd9ba< a8333c8262aed2aedf608c18edd39cf5342680a7 affected
… +10 more rows
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I. Basic Information for CVE-2026-43223

Vulnerability Information
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Vulnerability Title
media: pvrusb2: fix URB leak in pvr2_send_request_ex
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix URB leak in pvr2_send_request_ex When pvr2_send_request_ex() submits a write URB successfully but fails to submit the read URB (e.g. returns -ENOMEM), it returns immediately without waiting for the write URB to complete. Since the driver reuses the same URB structure, a subsequent call to pvr2_send_request_ex() attempts to submit the still-active write URB, triggering a 'URB submitted while active' warning in usb_submit_urb(). Fix this by ensuring the write URB is unlinked and waited upon if the read URB submission fails.
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pvr2_send_request_ex函数中URB泄漏，可能导致提交仍处于活动状态的写URB。
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 d855497edbfbf9e19a17f4a1154bca69cb4bd9ba ~ da524c939b1e5ba17f10db4bde4bdaf569ffcda6 -
Linux Linux 2.6.18 -

II. Public POCs for CVE-2026-43223

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III. Intelligence Information for CVE-2026-43223

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Patches & Fixes for CVE-2026-43223 (8)

Same Patch Batch · Linux · 2026-05-06 · 224 CVEs total

CVE-2026-43186 9.8 CRITICAL ipv6: ioam: fix heap buffer overflow in __ioam6_fill_trace_data()
CVE-2026-43185 9.8 CRITICAL ksmbd: fix signededness bug in smb_direct_prepare_negotiation()
CVE-2026-43125 9.8 CRITICAL dlm: validate length in dlm_search_rsb_tree
CVE-2026-43208 9.8 CRITICAL net: do not pass flow_id to set_rps_cpu()
CVE-2026-43198 9.8 CRITICAL tcp: fix potential race in tcp_v6_syn_recv_sock()
CVE-2026-43114 9.4 CRITICAL netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
CVE-2026-43117 9.1 CRITICAL btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()
CVE-2026-43083 9.1 CRITICAL net: ioam6: fix OOB and missing lock
CVE-2026-43197 9.1 CRITICAL netconsole: avoid OOB reads, msg is not nul-terminated
CVE-2026-43232 8.8 HIGH net: wan: farsync: Fix use-after-free bugs caused by unfinished tasklets
CVE-2026-43215 8.8 HIGH cifs: Fix locking usage for tcon fields
CVE-2026-43112 8.8 HIGH fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath
CVE-2026-43113 8.8 HIGH wifi: wl1251: validate packet IDs before indexing tx_frames
CVE-2026-43110 8.8 HIGH wifi: brcmfmac: validate bsscfg indices in IF events
CVE-2026-43187 8.8 HIGH xfs: delete attr leaf freemap entries when empty
CVE-2026-43283 8.8 HIGH net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle
CVE-2026-43176 8.8 HIGH wifi: rtw89: pci: validate release report content before using for RTL8922DE
CVE-2026-43239 8.8 HIGH smb: client: prevent races in ->query_interfaces()
CVE-2026-43249 8.8 HIGH 9p/xen: protect xen_9pfs_front_free against concurrent calls
CVE-2026-43172 8.8 HIGH wifi: iwlwifi: fix 22000 series SMEM parsing

Showing top 20 of 224 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43223

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