CVE-2026-74538— Bluetooth: ISO: lock sk in iso_connect_ind
Possible ATT&CK Techniques 1AI
T1068 · Exploitation for Privilege EscalationAffected Version Matrix 10
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 168d9bf9c7f01df71e6404cfff66d9c2a8e968fb< e8e9cff6d80eeec28dec4cf7cc18662986945391 | affected |
168d9bf9c7f01df71e6404cfff66d9c2a8e968fb< 9bee7e476534f27e830658dad962d85da9edf6bf | affected | ||
168d9bf9c7f01df71e6404cfff66d9c2a8e968fb< 4311fd6f429065a8ba208660360a895627a00cf3 | affected | ||
489efc9ae36f164423f5fa7ace772a7ab8131cd8 | affected | ||
6.8.9< 6.9 | affected | ||
6.9 | affected | ||
< 6.9 | unaffected | ||
6.18.44≤ 6.18.* | unaffected | ||
| … +2 more rows | |||
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I. Basic Information for CVE-2026-74538
Vulnerability Information
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Vulnerability Title
Bluetooth: ISO: lock sk in iso_connect_ind
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: lock sk in iso_connect_ind Accessing iso_pi(sk)->conn requires lock_sock, which is not taken in the "ev3" part of iso_connect_ind. It may also be NULL if socket has transitioned away from the LISTEN/CONNECT states before locking. Fix by adding lock/release. Recheck hcon is valid after lock acquire where needed.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 6.9版本存在安全漏洞，该漏洞源于Bluetooth ISO的iso_connect_ind函数在“ev3”部分访问iso_pi(sk)->conn时未获取锁，可能导致空指针取消引用或竞争条件。
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-2026-74538
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-74538 (2)
Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total
| CVE-2026-74280 | 10.0 CRITICAL | crypto: marvell/octeontx - fix DMA cleanup using wrong loop index |
| CVE-2026-74475 | 10.0 CRITICAL | vxlan: use neigh_ha_snapshot() in route_shortcircuit() |
| CVE-2026-72407 | 10.0 CRITICAL | geneve: validate inner network offset in geneve_gro_complete() |
| CVE-2026-74309 | 10.0 CRITICAL | vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler |
| CVE-2026-72408 | 10.0 CRITICAL | geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint |
| CVE-2026-72421 | 10.0 CRITICAL | ipv4: fib: Don't ignore error route in local/main tables. |
| CVE-2026-74279 | 10.0 CRITICAL | crypto: cavium/cpt - fix DMA cleanup using wrong loop index |
| CVE-2026-72493 | 9.9 CRITICAL | net: serialize netif_running() check in enqueue_to_backlog() |
| CVE-2026-72084 | 9.8 CRITICAL | scsi: target: Bound PR-OUT TransportID parsing to the received buffer |
| CVE-2026-72249 | 9.8 CRITICAL | netfilter: flowtable: use dst in this direction when pushing IPIP header |
| CVE-2026-72248 | 9.8 CRITICAL | netfilter: flowtable: support IPIP tunnel with direct xmit |
| CVE-2026-72098 | 9.8 CRITICAL | dm-verity: fix buffer overflow in FEC calculation |
| CVE-2026-72494 | 9.8 CRITICAL | RDMA/irdma: Replace waitqueue and flag with completion |
| CVE-2026-74345 | 9.8 CRITICAL | RDMA/siw: Fix endpoint/socket association handling |
| CVE-2026-74255 | 9.8 CRITICAL | tipc: fix UAF in tipc_l2_send_msg() |
| CVE-2026-72221 | 9.8 CRITICAL | sunrpc: wait for in-flight TLS handshake callback when cancel loses race |
| CVE-2026-72226 | 9.8 CRITICAL | batman-adv: tt: prevent TVLV OOB check overflow |
| CVE-2026-74428 | 9.8 CRITICAL | rxrpc: Fix double unlock in rxrpc_recvmsg() |
| CVE-2026-72083 | 9.8 CRITICAL | scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE |
| CVE-2026-72234 | 9.8 CRITICAL | batman-adv: access unicast_ttvn skb->data only after skb realloc |
Showing top 20 of 845 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
Same vendor: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
V. Comments for CVE-2026-74538
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