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CVE-2026-64147— pds_core: fix debugfs_lookup dentry leak and error handling

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存在安全漏洞，该漏洞源于pds_core模块中debugfs_lookup()返回的dentry未调用dput()释放，导致每次固件重置恢复时引用泄漏，且在CONFIG_DEBUG_FS禁用时返回错误指针而非NULL，检查逻辑误判导致调用dput()于无效指针，可能造成崩溃。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 15

VendorProduct Version RangeStatus
Linux Linux 2bbf2b1c20f934a054172175ccbabcc01fe69ef6< 60ef1675b652e912f3eb064767af4432393291fd affected
bc90fbe0c3182157d2be100a2f6c2edbb1820677< 26e19622c485e53c3fdb299e822068a0542ddf0c affected
bc90fbe0c3182157d2be100a2f6c2edbb1820677< 91d13e92b983e6c6d7631012c2e20ae8057de9f2 affected
bc90fbe0c3182157d2be100a2f6c2edbb1820677< d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32 affected
bc90fbe0c3182157d2be100a2f6c2edbb1820677< dc416e32baaeb620b9809e9e25fc7b30889686e9 affected
3ffe14c36985e3174933127c9efad82ac8f3fefb affected
6.6.16< 6.6.142 affected
6.7.4< 6.8 affected
… +7 more rows
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I. Basic Information for CVE-2026-64147

Vulnerability Information
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Vulnerability Title
pds_core: fix debugfs_lookup dentry leak and error handling
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: pds_core: fix debugfs_lookup dentry leak and error handling debugfs_lookup() returns a dentry with an elevated reference count that must be released with dput(). The current code discards the returned dentry without calling dput(), causing a reference leak on every firmware reset recovery. Additionally, when CONFIG_DEBUG_FS is disabled, debugfs_lookup() returns ERR_PTR(-ENODEV), not NULL. The current check passes for error pointers and would call dput() on an invalid pointer, causing a crash.
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存在安全漏洞，该漏洞源于pds_core模块中debugfs_lookup()返回的dentry未调用dput()释放，导致每次固件重置恢复时引用泄漏，且在CONFIG_DEBUG_FS禁用时返回错误指针而非NULL，检查逻辑误判导致调用dput()于无效指针，可能造成崩溃。
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 2bbf2b1c20f934a054172175ccbabcc01fe69ef6 ~ 60ef1675b652e912f3eb064767af4432393291fd -
Linux Linux 6.8 -

II. Public POCs for CVE-2026-64147

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III. Intelligence Information for CVE-2026-64147

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Patches & Fixes for CVE-2026-64147 (5)

Same Patch Batch · Linux · 2026-07-19 · 429 CVEs total

CVE-2026-63795 10.0 CRITICAL 9p: avoid putting oldfid in p9_client_walk() error path
CVE-2026-63887 9.8 CRITICAL scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf
CVE-2026-63994 9.8 CRITICAL tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]()
CVE-2026-64035 9.8 CRITICAL igc: set tx buffer type for SMD frames
CVE-2026-64142 9.8 CRITICAL ksmbd: close durable scavenger races against m_fp_list lookups
CVE-2026-63993 9.8 CRITICAL vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu()
CVE-2026-53399 9.8 CRITICAL nfsd: release layout stid on setlease failure
CVE-2026-53398 9.8 CRITICAL NFSD: Fix SECINFO_NO_NAME decode error cleanup
CVE-2026-63825 9.8 CRITICAL gcov: use atomic counter updates to fix concurrent access crashes
CVE-2026-64025 9.8 CRITICAL bpf, skmsg: fix verdict sk_data_ready racing with ktls rx
CVE-2026-64033 9.8 CRITICAL RDMA/rtrs: Fix use-after-free in path file creation cleanup
CVE-2026-63886 9.8 CRITICAL scsi: target: iscsi: Validate CHAP_R length before base64 decode
CVE-2026-64125 9.8 CRITICAL net: bcmgenet: keep RBUF EEE/PM disabled
CVE-2026-64091 9.8 CRITICAL batman-adv: tt: fix TOCTOU race for reported vlans
CVE-2026-63808 9.8 CRITICAL exfat: fix potential use-after-free in exfat_find_dir_entry()
CVE-2026-63978 9.8 CRITICAL net/handshake: Drain pending requests at net namespace exit
CVE-2026-63979 9.8 CRITICAL net/handshake: hand off the pinned file reference to accept_doit
CVE-2026-64132 9.8 CRITICAL ipv6: ioam: refresh hdr pointer before ioam6_event()
CVE-2026-64136 9.8 CRITICAL smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()
CVE-2026-63800 9.8 CRITICAL pNFS: Fix use-after-free in pnfs_update_layout()

Showing top 20 of 429 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64147

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