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CVE-2026-89522— media: staging/ipu7: fix async notifier UAF on probe error path

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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于异步通知器在探测错误路径未注销和清理，导致通知器仍链接在全局notifier_list中，而ipu7_isys结构体被释放，造成链表损坏和释放后重用。

CVSS 7.8 · High EPSS 0.17% · P6

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux a516d36bdc3d8373f904af57c95e76d6f921cf1c< 2a8dd9fd12f3f6b21207cec8f50c92cd428e6b81 affected
a516d36bdc3d8373f904af57c95e76d6f921cf1c< 323c411fb63122e8cef5b833032d69d59a838559 affected
a516d36bdc3d8373f904af57c95e76d6f921cf1c< d7f48aa7d60c65d3e6d5312c27f17d5525a245fb affected
6.17 affected
< 6.17 unaffected
6.18.50≤ 6.18.* unaffected
7.2.4≤ 7.2.* unaffected
7.3-rc1≤ * unaffected
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I. Basic Information for CVE-2026-89522

Vulnerability Information
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Vulnerability Title
media: staging/ipu7: fix async notifier UAF on probe error path
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: staging/ipu7: fix async notifier UAF on probe error path isys_register_devices() registers the V4L2 async notifier via isys_notifier_init(). If a subsequent probe step such as isys_fw_log_init() fails, isys_probe() jumps to the out_cleanup label which only calls isys_unregister_devices(). That helper tears down the video devices, subdevices, V4L2 device and media device, but never unregisters or cleans up the async notifier. As a result the notifier stays chained in the global notifier_list while the enclosing struct ipu7_isys is freed by devres, leading to list corruption and a use-after-free the next time the list is walked. The remove path already does the right thing by calling isys_notifier_cleanup() before isys_unregister_devices(). Mirror that on the probe error path so the notifier is unregistered and cleaned up before the device is torn down.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于异步通知器在探测错误路径未注销和清理，导致通知器仍链接在全局notifier_list中，而ipu7_isys结构体被释放，造成链表损坏和释放后重用。
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 a516d36bdc3d8373f904af57c95e76d6f921cf1c ~ 2a8dd9fd12f3f6b21207cec8f50c92cd428e6b81 -
Linux Linux 6.17 -

II. Public POCs for CVE-2026-89522

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III. Intelligence Information for CVE-2026-89522

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Patches & Fixes for CVE-2026-89522 (3)

Same Patch Batch · Linux · 2026-09-11 · 430 CVEs total

CVE-2026-89703 9.8 CRITICAL nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations
CVE-2026-89689 9.8 CRITICAL nfsd: don't free session slots that are still in use
CVE-2026-89558 9.8 CRITICAL md/raid10: fix still_degraded being inverted in raid10_sync_request()
CVE-2026-89555 9.8 CRITICAL mpls: reload header after pskb_may_pull()
CVE-2026-89550 9.8 CRITICAL SUNRPC: svcauth_gss: enforce krb5 token minimum length
CVE-2026-89551 9.8 CRITICAL SUNRPC: xdr_buf_trim: clamp buf->len to avoid underflow
CVE-2026-89546 9.8 CRITICAL SUNRPC: close backchannel before destroying callback service
CVE-2026-89542 9.8 CRITICAL SUNRPC: harden gss_krb5_unwrap_v2 against short tokens
CVE-2026-89541 9.8 CRITICAL SUNRPC: harden gss_unwrap_resp_priv length checks
CVE-2026-89538 9.8 CRITICAL SUNRPC: Reject krb5 v2 wrap tokens with oversized ec field
CVE-2026-89536 9.8 CRITICAL SUNRPC: wait for in-flight client TLS handshake callback
CVE-2026-89533 9.8 CRITICAL svcrdma: Fix offset arithmetic in read_chunk_range
CVE-2026-89530 9.8 CRITICAL svcrdma: Reject inline replies that overflow the pull-up buffer
CVE-2026-89526 9.8 CRITICAL svcrdma: Validate Read chunk positions before reconstruction
CVE-2026-81002 9.8 CRITICAL xdp: fix zero-copy frame layout
CVE-2026-89482 9.8 CRITICAL nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone
CVE-2026-89478 9.8 CRITICAL sctp: drop a chunk if its transport was removed
CVE-2026-89479 9.8 CRITICAL sctp: stop processing a packet once its association is deleted
CVE-2026-89485 9.8 CRITICAL lockd: pin next file across nlm_inspect_file lock-drop
CVE-2026-80986 9.8 CRITICAL net/smc: bound the peer rkey counts in SMC-Rv2 LLC messages

Showing top 20 of 430 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-89522

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