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CVE-2026-64021— drm/xe/oa: Fix exec_queue leak on width check in stream open

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 6.13版本存在安全漏洞，该漏洞源于在xe_oa_stream_open_ioctl()函数中，当param.exec_q->width > 1时函数直接返回-EOPNOTSUPP，跳过了已有的err_exec_q清理路径，导致xe_exec_queue_lookup()获取的exec_queue引用被泄露，使exec queue和文件私有状态被永久固定。

AI Predicted 5.5 Difficulty: Easy EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1505.003 · Web Shell

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux f0ed39830e6064d62f9c5393505677a26569bb56< 04ef7592eaadd9ca8f8f66e76452f73525cff819 affected
f0ed39830e6064d62f9c5393505677a26569bb56< 4b0c4f0c1b133d4bfa31c167200bcda646873328 affected
f0ed39830e6064d62f9c5393505677a26569bb56< 4d25342543c01310fc4e0cba7cb17c775e2421e2 affected
6.13 affected
< 6.13 unaffected
6.18.34≤ 6.18.* unaffected
7.0.11≤ 7.0.* unaffected
7.1≤ * unaffected
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I. Basic Information for CVE-2026-64021

Vulnerability Information
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Vulnerability Title
drm/xe/oa: Fix exec_queue leak on width check in stream open
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/xe/oa: Fix exec_queue leak on width check in stream open In xe_oa_stream_open_ioctl(), when param.exec_q->width > 1 the function returns -EOPNOTSUPP directly, skipping the existing err_exec_q cleanup path. The exec_queue reference obtained by xe_exec_queue_lookup() is leaked. The exec queue holds a reference on the xe_file, which is only dropped during queue teardown. The leaked lookup ref is not on the file's exec_queue xarray, so file close cannot release it. This keeps both the exec queue and the file private state pinned indefinitely. Jump to err_exec_q instead of returning directly so the reference is released. (cherry picked from commit 339fa0be9e4a5d69fa47e91f4a36574224fb478f)
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 6.13版本存在安全漏洞，该漏洞源于在xe_oa_stream_open_ioctl()函数中，当param.exec_q->width > 1时函数直接返回-EOPNOTSUPP，跳过了已有的err_exec_q清理路径，导致xe_exec_queue_lookup()获取的exec_queue引用被泄露，使exec queue和文件私有状态被永久固定。
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 f0ed39830e6064d62f9c5393505677a26569bb56 ~ 04ef7592eaadd9ca8f8f66e76452f73525cff819 -
Linux Linux 6.13 -

II. Public POCs for CVE-2026-64021

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III. Intelligence Information for CVE-2026-64021

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Patches & Fixes for CVE-2026-64021 (3)

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-2026-64021

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