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CVE-2026-64553— net: psample: fix info leak in PSAMPLE_ATTR_DATA

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基金会开源的一款操作系统内核。 Linux kernel 4.11版本存在安全漏洞，该漏洞源于psample模块在PSAMPLE_ATTR_DATA中未清除填充位，可能导致信息泄露。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 6ae0a6286171154661b74f7f550f9441c6008424< 0d3ea2ccddda442077fc44f11d873209c97ec50b affected
6ae0a6286171154661b74f7f550f9441c6008424< 7fe7e6949964aa8ee6305f09db2dc9eede977bb3 affected
6ae0a6286171154661b74f7f550f9441c6008424< e2fa322782a2d7d8078f7bb20817e0aa9f7c32e9 affected
6ae0a6286171154661b74f7f550f9441c6008424< befe1ebe7fc2c65c80074bc34ceeb0a721ed3cd2 affected
6ae0a6286171154661b74f7f550f9441c6008424< 48930f6c59fd0056c2de46ce52bfe27d9c9e5eb6 affected
6ae0a6286171154661b74f7f550f9441c6008424< a6cfb924ad74efce254e99c197d2e3863de70868 affected
6ae0a6286171154661b74f7f550f9441c6008424< 794a0d8bdbb39e083ed42caccb86d687a9b53570 affected
6ae0a6286171154661b74f7f550f9441c6008424< aedd02af1f8b0bceb7f42f5a21c41634ca9ed390 affected
… +10 more rows
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I. Basic Information for CVE-2026-64553

Vulnerability Information
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Vulnerability Title
net: psample: fix info leak in PSAMPLE_ATTR_DATA
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: psample: fix info leak in PSAMPLE_ATTR_DATA psample open codes nla_put() presumably to avoid wiping the data with 0s just to override it with packet data. This open coding is missing clearing the pad, however, each netlink attr is padded to 4B and data_len may not be divisible by 4B.
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基金会开源的一款操作系统内核。 Linux kernel 4.11版本存在安全漏洞，该漏洞源于psample模块在PSAMPLE_ATTR_DATA中未清除填充位，可能导致信息泄露。
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 6ae0a6286171154661b74f7f550f9441c6008424 ~ 0d3ea2ccddda442077fc44f11d873209c97ec50b -
Linux Linux 4.11 -

II. Public POCs for CVE-2026-64553

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III. Intelligence Information for CVE-2026-64553

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Patches & Fixes for CVE-2026-64553 (7)

Other References for CVE-2026-64553 (1)

Same Patch Batch · Linux · 2026-07-27 · 26 CVEs total

CVE-2026-64534 9.8 CRITICAL nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path
CVE-2026-64535 9.8 CRITICAL nvmet-tcp: Fix potential UAF when ddgst mismatch
CVE-2026-64541 9.8 CRITICAL net/smc: fix UAF in smc_cdc_rx_handler() by pinning the socket
CVE-2026-64551 9.1 CRITICAL sctp: validate STALE_COOKIE cause length before reading staleness
CVE-2026-64555 8.8 HIGH KVM: arm64: nv: Fix SPSR_EL2 restore in kvm_hyp_handle_mops()
CVE-2026-64554 8.8 HIGH netfilter: bridge: fix stale prevhdr pointer in br_ip6_fragment()
CVE-2026-64552 8.4 HIGH virtio-net: fix len check in receive_big()
CVE-2026-64548 8.4 HIGH bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()
CVE-2026-64536 8.1 HIGH staging: rtl8723bs: fix OOB reads in is_ap_in_tkip() IE loop
CVE-2026-64547 8.1 HIGH net: usb: net1080: validate packet_len before pad-byte access in rx_fixup
CVE-2026-64540 8.1 HIGH usbnet: gl620a: fix out-of-bounds read in genelink_rx_fixup()
CVE-2026-64532 7.8 HIGH fs/ntfs3: bound NTFS_DE view.data_off in UpdateRecordData{Root,Allocation}
CVE-2026-64543 7.8 HIGH tipc: fix use-after-free of the discoverer in tipc_disc_rcv()
CVE-2026-64539 7.8 HIGH Bluetooth: eir: Fix stack OOB write when prepending the Flags AD
CVE-2026-17523 7.8 HIGH can: bcm: switch timer to HRTIMER_MODE_SOFT and remove hrtimer_tasklet
CVE-2026-64533 7.8 HIGH fs/ntfs3: validate lcns_follow in log_replay conversion
CVE-2026-64531 7.8 HIGH net: openvswitch: reject oversized nested action attrs
CVE-2026-64545 7.5 HIGH net, bpf: check master for NULL in xdp_master_redirect()
CVE-2026-64550 7.3 HIGH net: qualcomm: rmnet: validate MAP frame length before ingress parsing
CVE-2026-64546 7.1 HIGH drm/edid: fix OOB read in drm_parse_tiled_block()

Showing top 20 of 26 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64553

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