Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-53133— RDMA/umem: Fix truncation for block sizes >= 4G

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 5.2版本存在安全漏洞，该漏洞源于当使用iommu时，线性化映射会给出一个非常大的单个块，分布在多个SG条目中，当__rdma_block_iter_next()重新组装分裂的SG条目时，32位堆栈值溢出，导致截断后计算出错误的DMA地址。

CVSS 7.8 · High EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux a808273a495c657e33281b181fd7fcc2bb28f662< 2ff4b7817e5b78070c30f5fb5e678e452a2628b3 affected
a808273a495c657e33281b181fd7fcc2bb28f662< dee2a49adeeb2a5e16a3fc858fa21b841c519802 affected
a808273a495c657e33281b181fd7fcc2bb28f662< cc644d5608e3b0dadc970bd6e6aa26b91ea07d0f affected
a808273a495c657e33281b181fd7fcc2bb28f662< 8fe0231adebe086c8a459c790944ac026cd99c6e affected
a808273a495c657e33281b181fd7fcc2bb28f662< baf8685bcf56dc1efb44b8f6a57c42516e549068 affected
a808273a495c657e33281b181fd7fcc2bb28f662< afd35fec9297195b759078745549c2671223f24f affected
a808273a495c657e33281b181fd7fcc2bb28f662< ac1aad8e1281534ce936c250f68084fc79c5469e affected
a808273a495c657e33281b181fd7fcc2bb28f662< 15fe76e23615f502d051ef0768f86babaf08746c affected
… +10 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-53133

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
RDMA/umem: Fix truncation for block sizes >= 4G
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/umem: Fix truncation for block sizes >= 4G When the iommu is used the linearization of the mapping can give a single block that is very large split across multiple SG entries. When __rdma_block_iter_next() reassembles the split SG entries it is overflowing the 32 bit stack values and computed the wrong DMA addresses for blocks after the truncation. Use the right types to hold DMA addresses.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/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基金会开源的操作系统Linux所使用的内核。 Linux kernel 5.2版本存在安全漏洞，该漏洞源于当使用iommu时，线性化映射会给出一个非常大的单个块，分布在多个SG条目中，当__rdma_block_iter_next()重新组装分裂的SG条目时，32位堆栈值溢出，导致截断后计算出错误的DMA地址。
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 a808273a495c657e33281b181fd7fcc2bb28f662 ~ 2ff4b7817e5b78070c30f5fb5e678e452a2628b3 -
Linux Linux 5.2 -

II. Public POCs for CVE-2026-53133

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-53133

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-53133 (8)

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

CVE-2026-53228 9.8 CRITICAL ipv6: sit: reload inner IPv6 header after GSO offloads
CVE-2026-53247 9.8 CRITICAL net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown
CVE-2026-53246 9.8 CRITICAL sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing
CVE-2026-53151 9.8 CRITICAL rxrpc: Fix the ACK parser to extract the SACK table for parsing
CVE-2026-53260 9.8 CRITICAL tcp: Add preempt_{disable,enable}_nested() in reqsk_queue_hash_req().
CVE-2026-53175 9.8 CRITICAL inet: frags: fix use-after-free caused by the fqdir_pre_exit() flush
CVE-2026-53176 9.8 CRITICAL IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN
CVE-2026-53221 9.8 CRITICAL ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup()
CVE-2026-53215 9.8 CRITICAL net: mvpp2: refill RX buffers before XDP or skb use
CVE-2026-53216 9.8 CRITICAL net: mvpp2: limit XDP frame size to the RX buffer
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-2026-53186 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-2026-53171 8.8 HIGH accel/ethosu: fix arithmetic issues in dma_length()
CVE-2026-53248 8.8 HIGH net: airoha: Fix use-after-free in metadata dst teardown
CVE-2026-53159 8.8 HIGH misc: fastrpc: fix DMA address corruption due to find_vma misuse
CVE-2026-53198 8.8 HIGH ksmbd: fix use-after-free of a deferred file_lock on double SMB2_CANCEL
CVE-2026-53188 8.8 HIGH RDMA/core: Validate the passed in fops for ib_get_ucaps()
CVE-2026-53170 8.8 HIGH accel/ethosu: reject DMA commands with uninitialized length

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-2026-53133

No comments yet

Leave a comment