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CVE-2026-53238— netlabel: validate unlabeled address and mask attribute lengths

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 2.6.25版本及之后版本存在安全漏洞，该漏洞源于netlbl_unlabel_addrinfo_get()函数未独立验证掩码属性长度，可能导致特制Generic Netlink请求提供较短掩码属性进而被读取为完整结构。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd< 975a84fd741440853380d37465b6e226cf47254c affected
8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd< 672f0f3b8f875ffe6525a37847eafa7648c4c0c6 affected
8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd< 95bda3eac0b1454c2cee98d58d9ba6dd8391e843 affected
8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd< 07a18f5c90dd3d586b73242f5a5bbf0a72f2fdc6 affected
8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd< 71c52da13c3737493b42d20d9f33de34e03b3156 affected
8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd< 0c4bb32ad7fdc2dc6a8050f41eb04d4bda56b6c8 affected
8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd< ccfe292a966079c61ea68a2da303b2a336170993 affected
8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd< 9772589b57e44aedc240211c5c3f7a684a034d3a affected
… +10 more rows
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I. Basic Information for CVE-2026-53238

Vulnerability Information
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Vulnerability Title
netlabel: validate unlabeled address and mask attribute lengths
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netlabel: validate unlabeled address and mask attribute lengths netlbl_unlabel_addrinfo_get() used the address attribute length to determine whether the attribute data could be read as an IPv4 or IPv6 address, but did not independently validate the corresponding mask attribute length. A crafted Generic Netlink request could therefore provide a valid IPv4/IPv6 address attribute with a shorter mask attribute, which would later be read as a full struct in_addr or struct in6_addr. NLA_BINARY policy lengths are maximum lengths by default, so use NLA_POLICY_EXACT_LEN() for the unlabeled IPv4/IPv6 address and mask attributes. This rejects short attributes during policy validation and also exposes the exact length requirements through policy introspection.
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基金会开源的操作系统Linux所使用的内核。 Linux kernel 2.6.25版本及之后版本存在安全漏洞，该漏洞源于netlbl_unlabel_addrinfo_get()函数未独立验证掩码属性长度，可能导致特制Generic Netlink请求提供较短掩码属性进而被读取为完整结构。
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 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd ~ 975a84fd741440853380d37465b6e226cf47254c -
Linux Linux 2.6.25 -

II. Public POCs for CVE-2026-53238

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III. Intelligence Information for CVE-2026-53238

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Patches & Fixes for CVE-2026-53238 (7)

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

CVE-2026-53176 9.8 CRITICAL IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN
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-2026-53221 9.8 CRITICAL ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()
CVE-2026-53247 9.8 CRITICAL net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown
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-2026-53246 9.8 CRITICAL sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing
CVE-2026-53175 9.8 CRITICAL inet: frags: fix use-after-free caused by the fqdir_pre_exit() flush
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-2026-53225 9.1 CRITICAL sctp: fix uninit-value in __sctp_rcv_asconf_lookup()
CVE-2026-53224 9.1 CRITICAL sctp: validate embedded INIT chunk and address list lengths in cookie
CVE-2026-53186 9.1 CRITICAL RDMA/srp: bound SRP_RSP sense copy by the received length
CVE-2026-53240 8.8 HIGH xfrm: iptfs: fix use-after-free on first_skb in __input_process_payload
CVE-2026-53171 8.8 HIGH accel/ethosu: fix arithmetic issues in dma_length()
CVE-2026-53232 8.8 HIGH net: phy: clean the sfp upstream if phy probing fails
CVE-2026-53159 8.8 HIGH misc: fastrpc: fix DMA address corruption due to find_vma misuse
CVE-2026-53170 8.8 HIGH accel/ethosu: reject DMA commands with uninitialized length
CVE-2026-53188 8.8 HIGH RDMA/core: Validate the passed in fops for ib_get_ucaps()

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-2026-53238

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