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CVE-2026-72242— selinux: avoid sk_socket dereference in selinux_sctp_bind_connect()

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存在安全漏洞，该漏洞源于selinux_sctp_bind_connect()函数对sk->sk_socket进行解引用，在ASCONF软中断路径下可能因缺少文件引用导致空指针取消引用。

CVSS 7.5 · High EPSS 0.60% · P46

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux d452930fd3b9031e59abfeddb2fa383f1403d61a< e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55 affected
d452930fd3b9031e59abfeddb2fa383f1403d61a< 2fcaf133a8fd88b69f32ebaecad93fd302da828f affected
d452930fd3b9031e59abfeddb2fa383f1403d61a< a4bc2fb8536488b37680c0b66c59434a4b7f8c2f affected
d452930fd3b9031e59abfeddb2fa383f1403d61a< 5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4 affected
d452930fd3b9031e59abfeddb2fa383f1403d61a< cc8bd47b35eca82393cbad08b1cc86f02e034439 affected
d452930fd3b9031e59abfeddb2fa383f1403d61a< d61a80b17254be7230bc5544f8e62ddf21ab38e2 affected
d452930fd3b9031e59abfeddb2fa383f1403d61a< 37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb affected
d452930fd3b9031e59abfeddb2fa383f1403d61a< 56acfeb10019e200ab6787d01f8d7cbe0f01526f affected
… +10 more rows
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I. Basic Information for CVE-2026-72242

Vulnerability Information
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Vulnerability Title
selinux: avoid sk_socket dereference in selinux_sctp_bind_connect()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: selinux: avoid sk_socket dereference in selinux_sctp_bind_connect() selinux_sctp_bind_connect() dereferences sk->sk_socket to pass a struct socket * to selinux_socket_bind() and selinux_socket_connect_helper(). However, when the hook is invoked from the ASCONF softirq path (sctp_process_asconf), there is no file reference guaranteeing that sk->sk_socket is non-NULL. The setsockopt callers (bindx, connectx, set_primary, sendmsg connect) hold a file reference and are not affected. Both selinux_socket_bind() and selinux_socket_connect_helper() immediately resolve sock->sk, never using the struct socket * for anything else. Refactor the inner logic into helpers that take a struct sock * directly so that selinux_sctp_bind_connect() never needs to touch sk->sk_socket at all.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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存在安全漏洞，该漏洞源于selinux_sctp_bind_connect()函数对sk->sk_socket进行解引用，在ASCONF软中断路径下可能因缺少文件引用导致空指针取消引用。
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 d452930fd3b9031e59abfeddb2fa383f1403d61a ~ e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55 -
Linux Linux 4.17 -

II. Public POCs for CVE-2026-72242

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III. Intelligence Information for CVE-2026-72242

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Patches & Fixes for CVE-2026-72242 (8)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-74376 9.8 CRITICAL md/raid10: reset read_slot when reusing r10bio for discard
CVE-2026-74433 9.8 CRITICAL rxrpc: Fix UAF in rxgk_issue_challenge()
CVE-2026-74434 9.8 CRITICAL rxrpc: Don't move a peeked OOB message onto the pending queue
CVE-2026-72191 9.8 CRITICAL ntfs3: validate split-point offset in indx_insert_into_buffer
CVE-2026-72299 9.8 CRITICAL tipc: restrict socket queue dumps in enqueue tracepoints
CVE-2026-72398 9.8 CRITICAL sctp: add INIT verification after cookie unpacking
CVE-2026-74384 9.8 CRITICAL nvme-multipath: fix flex array size in struct nvme_ns_head
CVE-2026-72442 9.8 CRITICAL netfilter: flowtable: fix and simplify IP6IP6 tunnel handling
CVE-2026-74436 9.8 CRITICAL rxrpc: serialize kernel accept preallocation with socket teardown
CVE-2026-74545 9.8 CRITICAL rtase: fix double free of multi-frag skb on DMA map failure
CVE-2026-72046 9.8 CRITICAL gve: fix header buffer corruption with header-split and HW-GRO
CVE-2026-72473 9.8 CRITICAL xprtrdma: Decouple req recycling from RPC completion

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-72242

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