CVE-2026-43255— wifi: libertas: fix WARNING in usb_tx_block
Possible ATT&CK Techniques 3AI
T1206 T1068 · Exploitation for Privilege Escalation T1203 · Exploitation for Client ExecutionAffected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 876c9d3aeb989cf1961f2c228d309ba5dcfb1172< 498525d8358d6d20918787e59736d5b6a021e9fd | affected |
876c9d3aeb989cf1961f2c228d309ba5dcfb1172< 2902a9b4415a6bafc9b1e5dd360f065d757a0bb7 | affected | ||
876c9d3aeb989cf1961f2c228d309ba5dcfb1172< 948a39c95d0f8d73722910f8cdb7b6e3e9206232 | affected | ||
876c9d3aeb989cf1961f2c228d309ba5dcfb1172< 5bfb25495e391a1be0db94b15715174fa06b93a1 | affected | ||
876c9d3aeb989cf1961f2c228d309ba5dcfb1172< b82073564373e68c6ae3a96039fae14cd002a496 | affected | ||
876c9d3aeb989cf1961f2c228d309ba5dcfb1172< 3308c7504e093b22e91a4468470309cee2e26b83 | affected | ||
876c9d3aeb989cf1961f2c228d309ba5dcfb1172< fc188b44547dea4e7350833171982a6312befde9 | affected | ||
876c9d3aeb989cf1961f2c228d309ba5dcfb1172< d66676e6ca96bf8680f869a9bd6573b26c634622 | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2026-43255
Vulnerability Information
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Vulnerability Title
wifi: libertas: fix WARNING in usb_tx_block
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: libertas: fix WARNING in usb_tx_block The function usb_tx_block() submits cardp->tx_urb without ensuring that any previous transmission on this URB has completed. If a second call occurs while the URB is still active (e.g. during rapid firmware loading), usb_submit_urb() detects the active state and triggers a warning: 'URB submitted while active'. Fix this by enforcing serialization: call usb_kill_urb() before submitting the new request. This ensures the URB is idle and safe to reuse.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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libertas驱动在usb_tx_block函数中未确保URB传输完成，可能导致警告。
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
II. Public POCs for CVE-2026-43255
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-43255 (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-2026-43125 | 9.8 CRITICAL | dlm: validate length in dlm_search_rsb_tree |
| CVE-2026-43185 | 9.8 CRITICAL | ksmbd: fix signededness bug in smb_direct_prepare_negotiation() |
| 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-2026-43187 | 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-2026-43215 | 8.8 HIGH | cifs: Fix locking usage for tcon fields |
| CVE-2026-43176 | 8.8 HIGH | wifi: rtw89: pci: validate release report content before using for RTL8922DE |
| CVE-2026-43172 | 8.8 HIGH | wifi: iwlwifi: fix 22000 series SMEM parsing |
| CVE-2026-43113 | 8.8 HIGH | wifi: wl1251: validate packet IDs before indexing tx_frames |
| CVE-2026-43249 | 8.8 HIGH | 9p/xen: protect xen_9pfs_front_free against concurrent calls |
| CVE-2026-43239 | 8.8 HIGH | smb: client: prevent races in ->query_interfaces() |
| CVE-2026-43158 | 8.8 HIGH | xfs: fix freemap adjustments when adding xattrs to leaf blocks |
| CVE-2026-43112 | 8.8 HIGH | fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath |
| CVE-2026-43110 | 8.8 HIGH | wifi: brcmfmac: validate bsscfg indices in IF events |
Showing top 20 of 224 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-53356
drm/i915/gem: Fix phys BO pread/pwrite with offset - CVE-2026-53355
net: rds: clear i_sends on setup unwind - CVE-2026-53354
arm64: errata: Mitigate TLBI errata on various Arm CPUs - CVE-2026-53353
hsr: Remove WARN_ONCE() in hsr_addr_is_self(). - CVE-2026-53351
riscv/ptrace: Use USER_REGSET_NOTE_TYPE for REGSET_CFI
Same vendor: Linux
- CVE-2026-53356
drm/i915/gem: Fix phys BO pread/pwrite with offset - CVE-2026-53355
net: rds: clear i_sends on setup unwind - CVE-2026-53354
arm64: errata: Mitigate TLBI errata on various Arm CPUs - CVE-2026-53353
hsr: Remove WARN_ONCE() in hsr_addr_is_self(). - CVE-2026-53351
riscv/ptrace: Use USER_REGSET_NOTE_TYPE for REGSET_CFI
V. Comments for CVE-2026-43255
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