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CVE-2026-64182— drivers/base/memory: fix memory block reference leak in poison accounting

AI Predicted 5.5 Difficulty: Moderate EPSS 0.16% · P5

Possible ATT&CK Techniques 1AI

T1564.001 · Hidden Files and Directories

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinux5033091de814ab4b5623faed2755f3064e19e2d2< 686b4283f82cd630fafd7ca9b03dfc080b3ec8faaffected
5033091de814ab4b5623faed2755f3064e19e2d2< ce60d9452a0f2effa72fd20ea270c59ca691d455affected
5033091de814ab4b5623faed2755f3064e19e2d2< 24840b3139d7415144b81e4f9f4c44670d15bed9affected
5033091de814ab4b5623faed2755f3064e19e2d2< 8502e2c2d0633f99d94d22ae8dabc10caae1fc2aaffected
5033091de814ab4b5623faed2755f3064e19e2d2< 03a2cc1756a0570f887d624cd6c535ea0cbd4951affected
6.2affected
< 6.2unaffected
6.6.142≤ 6.6.*unaffected
… +4 more rows
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I. Basic Information for CVE-2026-64182

Vulnerability Information
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Vulnerability Title
drivers/base/memory: fix memory block reference leak in poison accounting
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drivers/base/memory: fix memory block reference leak in poison accounting memblk_nr_poison_inc() and memblk_nr_poison_sub() look up a memory block via find_memory_block_by_id(), which acquires a reference to the memory block device. Both helpers use the returned memory block without dropping that reference, leaking the device reference on each successful lookup. Drop the reference after updating nr_hwpoison.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 5033091de814ab4b5623faed2755f3064e19e2d2 ~ 686b4283f82cd630fafd7ca9b03dfc080b3ec8fa -
LinuxLinux 6.2 -

II. Public POCs for CVE-2026-64182

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III. Intelligence Information for CVE-2026-64182

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Patches & Fixes for CVE-2026-64182 (5)

Same Patch Batch · Linux · 2026-07-19 · 431 CVEs total

CVE-2026-6379510.0 CRITICAL9p: avoid putting oldfid in p9_client_walk() error path
CVE-2026-638009.8 CRITICALpNFS: Fix use-after-free in pnfs_update_layout()
CVE-2026-640559.8 CRITICALnet: ethernet: cortina: Carry over frag counter
CVE-2026-640569.8 CRITICALnet: ethernet: cortina: Make RX SKB per-port
CVE-2026-640619.8 CRITICALnetfs: Fix early put of sink folio in netfs_read_gaps()
CVE-2026-640669.8 CRITICALnetfs: Fix netfs_read_to_pagecache() to pause on subreq failure
CVE-2026-640679.8 CRITICALnetfs: Fix missing barriers when accessing stream->subrequests locklessly
CVE-2026-640689.8 CRITICALnetfs: Fix missing locking around retry adding new subreqs
CVE-2026-640699.8 CRITICALnetfs: Fix cancellation of a DIO and single read subrequests
CVE-2026-638089.8 CRITICALexfat: fix potential use-after-free in exfat_find_dir_entry()
CVE-2026-640899.8 CRITICALbatman-adv: tt: fix negative last_changeset_len
CVE-2026-640919.8 CRITICALbatman-adv: tt: fix TOCTOU race for reported vlans
CVE-2026-533999.8 CRITICALnfsd: release layout stid on setlease failure
CVE-2026-641429.8 CRITICALksmbd: close durable scavenger races against m_fp_list lookups
CVE-2026-641369.8 CRITICALsmb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()
CVE-2026-641329.8 CRITICALipv6: ioam: refresh hdr pointer before ioam6_event()
CVE-2026-533989.8 CRITICALNFSD: Fix SECINFO_NO_NAME decode error cleanup
CVE-2026-641229.8 CRITICALnet/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover
CVE-2026-641029.8 CRITICALRDMA/siw: Reject MPA FPDU length underflow before signed receive math
CVE-2026-641139.8 CRITICALixgbevf: fix use-after-free in VEPA multicast source pruning

Showing top 20 of 431 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64182

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