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CVE-2026-53245— net/802/mrp: fix vector attribute parsing in mrp_pdu_parse_vecattr

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mrp_pdu_parse_vecattr函数中向量属性解析逻辑错误，包括：处理第三个事件后未递减valen、valen为零时无条件消耗FirstValue以及跨字节边界时属性值未递增，可能导致错误事件被应用到MRP申请人状态、后续PDU解析偏移损坏及属性值重复使用。以下版本受到影响：3.9版本。

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 febf018d22347b5df94066bca05d0c11a84e839d< ae65714d96f68bb252eb20085320bdaacab36c00 affected
febf018d22347b5df94066bca05d0c11a84e839d< 36d259711872e3b2f6cd76a4d270c21931c0f35f affected
febf018d22347b5df94066bca05d0c11a84e839d< cc98717e591a963a616fdf15ecf48eefaf45d758 affected
febf018d22347b5df94066bca05d0c11a84e839d< 6d6e42e8e17f18d61327f8653479c5b5e161ae1d affected
febf018d22347b5df94066bca05d0c11a84e839d< fd9c3a47c670bec6b18f44454cea023f93b5adb3 affected
febf018d22347b5df94066bca05d0c11a84e839d< 42446ca0f3570663e87183c065e0b4def52dfba2 affected
febf018d22347b5df94066bca05d0c11a84e839d< 6eea6494e542a03cdf755a593b7d74f3f7c260fd affected
febf018d22347b5df94066bca05d0c11a84e839d< 7561c7fbc694308da73300f036719e63e42bf0b4 affected
… +10 more rows
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I. Basic Information for CVE-2026-53245

Vulnerability Information
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Vulnerability Title
net/802/mrp: fix vector attribute parsing in mrp_pdu_parse_vecattr
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/802/mrp: fix vector attribute parsing in mrp_pdu_parse_vecattr In mrp_pdu_parse_vecattr(), vector attribute events are encoded three per byte and valen tracks the number of events left to process. The parser decrements valen after processing the first and second events from each event byte, but not after processing the third one. When valen is exactly a multiple of three, the loop continues after the last valid event and consumes the next byte as a new event byte, applying a spurious event to the MRP applicant state. Additionally, when valen is zero the parser unconditionally consumes attrlen bytes as FirstValue and advances the offset, even though per IEEE 802.1ak a VectorAttribute with only a LeaveAllEvent has valen of zero and no FirstValue or Vector fields. This corrupts the offset for subsequent PDU parsing. Also, when valen exceeds three the loop crosses byte boundaries but the attribute value is not incremented between the last event of one byte and the first event of the next. This causes the first event of the next byte to use the same attribute value as the third event rather than the next consecutive value. Decrement valen after processing the third event, skip FirstValue consumption when valen is zero, and increment the attribute value at the end of each loop iteration.
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存在安全漏洞，该漏洞源于mrp_pdu_parse_vecattr函数中向量属性解析逻辑错误，包括：处理第三个事件后未递减valen、valen为零时无条件消耗FirstValue以及跨字节边界时属性值未递增，可能导致错误事件被应用到MRP申请人状态、后续PDU解析偏移损坏及属性值重复使用。以下版本受到影响：3.9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 febf018d22347b5df94066bca05d0c11a84e839d ~ ae65714d96f68bb252eb20085320bdaacab36c00 -
Linux Linux 3.9 -

II. Public POCs for CVE-2026-53245

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III. Intelligence Information for CVE-2026-53245

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Patches & Fixes for CVE-2026-53245 (8)

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

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