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CVE-2026-53225— sctp: fix uninit-value in __sctp_rcv_asconf_lookup()

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基金会开源的操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于__sctp_rcv_asconf_lookup()函数中未正确验证ASCONF地址参数边界，可能导致未经身份验证的对等端发送截断的ASCONF块，从而使from_addr_param()读取未初始化的内存。以下版本受到影响：2.6.25版本。

CVSS 9.1 · Critical EPSS 0.73% · P53

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux df21857714398acb8b24a8bb5a6d2286dd9c59ef< 446e0ecd845abc394b24ae2030a883572bec9d16 affected
df21857714398acb8b24a8bb5a6d2286dd9c59ef< 928dd94db23e8ba340f83d68f7f24d831b7a4426 affected
df21857714398acb8b24a8bb5a6d2286dd9c59ef< d796cfd06074b579d265b28401306cadd30db945 affected
df21857714398acb8b24a8bb5a6d2286dd9c59ef< 8ce96f1182644079249a24ac7e2ffc32e0301a46 affected
df21857714398acb8b24a8bb5a6d2286dd9c59ef< d6bd0bb7697ea8c0387b0d9d973453f479017b23 affected
df21857714398acb8b24a8bb5a6d2286dd9c59ef< f76a8b323e28e0951f979dbef20a7496383c47df affected
df21857714398acb8b24a8bb5a6d2286dd9c59ef< 8e86817b8af4d552f3c6fe04ca52bb0c8c57411d affected
df21857714398acb8b24a8bb5a6d2286dd9c59ef< f8373d7090b745728de66308deeecc67e8d319ce affected
… +10 more rows
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I. Basic Information for CVE-2026-53225

Vulnerability Information
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Vulnerability Title
sctp: fix uninit-value in __sctp_rcv_asconf_lookup()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: sctp: fix uninit-value in __sctp_rcv_asconf_lookup() __sctp_rcv_asconf_lookup() in net/sctp/input.c only checks that the ASCONF chunk can hold the ADDIP header and a parameter header, then calls af->from_addr_param(), which reads the full address (16 bytes for IPv6) trusting the parameter's declared length. An unauthenticated peer can send a truncated trailing ASCONF chunk that declares an IPv6 address parameter but stops after the 4-byte parameter header; reached from the no-association lookup path, from_addr_param() then reads uninitialized bytes past the parameter. Impact: an unauthenticated SCTP peer makes the receive path read up to 16 bytes of uninitialized memory past a truncated ASCONF address parameter. The sibling __sctp_rcv_init_lookup() bounds parameters with sctp_walk_params(); this path open-codes the fetch and omits the bound. Verify the whole address parameter lies within the chunk before from_addr_param() reads it, the same class of fix as commit 51e5ad549c43 ("net: sctp: fix KMSAN uninit-value in sctp_inq_pop").
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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基金会开源的操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于__sctp_rcv_asconf_lookup()函数中未正确验证ASCONF地址参数边界，可能导致未经身份验证的对等端发送截断的ASCONF块，从而使from_addr_param()读取未初始化的内存。以下版本受到影响：2.6.25版本。
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 df21857714398acb8b24a8bb5a6d2286dd9c59ef ~ 446e0ecd845abc394b24ae2030a883572bec9d16 -
Linux Linux 2.6.25 -

II. Public POCs for CVE-2026-53225

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III. Intelligence Information for CVE-2026-53225

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Patches & Fixes for CVE-2026-53225 (8)

Same Patch Batch · Linux · 2026-06-25 · 146 CVEs total

CVE-2026-53175 9.8 CRITICAL inet: frags: fix use-after-free caused by the fqdir_pre_exit() flush
CVE-2026-53221 9.8 CRITICAL ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()
CVE-2026-53176 9.8 CRITICAL IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN
CVE-2026-53246 9.8 CRITICAL sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing
CVE-2026-53247 9.8 CRITICAL net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown
CVE-2026-53228 9.8 CRITICAL ipv6: sit: reload inner IPv6 header after GSO offloads
CVE-2026-53151 9.8 CRITICAL rxrpc: Fix the ACK parser to extract the SACK table for parsing
CVE-2026-53216 9.8 CRITICAL net: mvpp2: limit XDP frame size to the RX buffer
CVE-2026-53260 9.8 CRITICAL tcp: Add preempt_{disable,enable}_nested() in reqsk_queue_hash_req().
CVE-2026-53215 9.8 CRITICAL net: mvpp2: refill RX buffers before XDP or skb use
CVE-2026-53131 9.4 CRITICAL netfilter: require Ethernet MAC header before using eth_hdr()
CVE-2026-53186 9.1 CRITICAL RDMA/srp: bound SRP_RSP sense copy by the received length
CVE-2026-53224 9.1 CRITICAL sctp: validate embedded INIT chunk and address list lengths in cookie
CVE-2026-53232 8.8 HIGH net: phy: clean the sfp upstream if phy probing fails
CVE-2026-53277 8.8 HIGH KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation
CVE-2026-53198 8.8 HIGH ksmbd: fix use-after-free of a deferred file_lock on double SMB2_CANCEL
CVE-2026-53248 8.8 HIGH net: airoha: Fix use-after-free in metadata dst teardown
CVE-2026-53170 8.8 HIGH accel/ethosu: reject DMA commands with uninitialized length
CVE-2026-53159 8.8 HIGH misc: fastrpc: fix DMA address corruption due to find_vma misuse
CVE-2026-53275 8.8 HIGH ipv6: mcast: Fix use-after-free when processing MLD queries

Showing top 20 of 146 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-53225

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