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CVE-2026-64173— tracing: Do not call map->ops->elt_free() if elt_alloc() fails

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，该漏洞源于在追踪映射中，当elt_alloc()分配对象失败时，错误地调用了map->ops->elt_free()函数。

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.11% · P1

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 2734b629525a9dae5bf217cbf0a9651da93d2108< 49332e49ad5b20262cc719b03d4123b9362de701 affected
2734b629525a9dae5bf217cbf0a9651da93d2108< b559a218eece132de0c58d444877b5627cbee524 affected
2734b629525a9dae5bf217cbf0a9651da93d2108< b427e9f6d81c9341cba23ef92f860f99f830d91d affected
2734b629525a9dae5bf217cbf0a9651da93d2108< f383cff9fb382139980bac1bcd3f3f5d59f68435 affected
2734b629525a9dae5bf217cbf0a9651da93d2108< 1a150947f8480262a46c860f1acb9c6597ca7097 affected
2734b629525a9dae5bf217cbf0a9651da93d2108< 798183376d9d3e278a270ea0e75a5769c8f145d9 affected
2734b629525a9dae5bf217cbf0a9651da93d2108< b6723339736320b2e1784258ad4490cec7aac11a affected
2734b629525a9dae5bf217cbf0a9651da93d2108< 8f0f5c4fb9df0e19a341e0c6ed8dc4fda9124f03 affected
… +10 more rows
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I. Basic Information for CVE-2026-64173

Vulnerability Information
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Vulnerability Title
tracing: Do not call map->ops->elt_free() if elt_alloc() fails
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: tracing: Do not call map->ops->elt_free() if elt_alloc() fails In paths where tracing_map_elt_alloc() failed to allocate objects, the map->ops->elt_alloc() call was never successful. In this case, map->ops->elt_free() should not be called.
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，该漏洞源于在追踪映射中，当elt_alloc()分配对象失败时，错误地调用了map->ops->elt_free()函数。
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 2734b629525a9dae5bf217cbf0a9651da93d2108 ~ 49332e49ad5b20262cc719b03d4123b9362de701 -
Linux Linux 4.17 -

II. Public POCs for CVE-2026-64173

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III. Intelligence Information for CVE-2026-64173

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Patches & Fixes for CVE-2026-64173 (7)

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-2026-64173

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