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CVE-2026-89597— fbdev: uvesafb: unregister connector callback on init failure

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uvesafb_init()在注册平台驱动前注册了v86d连接器回调，当platform_driver_register()失败时直接返回错误，未注销已注册的连接器回调，可能导致连接器回调残留。

CVSS 7.8 · High EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 8bdb3a2d7df48b861972c4bfb58490853a228f51< b149f77d04082a9da75944cdc488becb0e35258f affected
8bdb3a2d7df48b861972c4bfb58490853a228f51< 0352fdac3cbf11e3b323322ff8cd95e20cbf5cd7 affected
8bdb3a2d7df48b861972c4bfb58490853a228f51< 17518e7123f7ef01b1155064dc01f2087583908e affected
8bdb3a2d7df48b861972c4bfb58490853a228f51< 9eb7b3cbe99c9c0edbff69eb155c723e30983c22 affected
8bdb3a2d7df48b861972c4bfb58490853a228f51< 9f8a822b44c42502f105cf6574f4867067eecdd0 affected
8bdb3a2d7df48b861972c4bfb58490853a228f51< 466a8af0dee2cf745307155e26884e19a37b7e15 affected
8bdb3a2d7df48b861972c4bfb58490853a228f51< 9e768ae51426af2034d479133cfd73010d641b1a affected
8bdb3a2d7df48b861972c4bfb58490853a228f51< de8db23aa7c337e606fca9faf48b3ba72968597a affected
… +10 more rows
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I. Basic Information for CVE-2026-89597

Vulnerability Information
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Vulnerability Title
fbdev: uvesafb: unregister connector callback on init failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fbdev: uvesafb: unregister connector callback on init failure uvesafb_init() registers the v86d connector callback before registering the platform driver. If platform_driver_register() fails, the function returns the error directly and leaves the connector callback registered. The later platform-device failure path already unregisters the callback. Add the same cleanup before the final return when platform-driver registration fails. This issue was identified during our ongoing static-analysis research while reviewing kernel code.
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uvesafb_init()在注册平台驱动前注册了v86d连接器回调，当platform_driver_register()失败时直接返回错误，未注销已注册的连接器回调，可能导致连接器回调残留。
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 8bdb3a2d7df48b861972c4bfb58490853a228f51 ~ b149f77d04082a9da75944cdc488becb0e35258f -
Linux Linux 2.6.24 -

II. Public POCs for CVE-2026-89597

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III. Intelligence Information for CVE-2026-89597

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Patches & Fixes for CVE-2026-89597 (8)

Same Patch Batch · Linux · 2026-09-11 · 431 CVEs total

CVE-2026-89688 9.8 CRITICAL nfsd: drop the stateid, not the stateowner, on seqid_op replay retry
CVE-2026-89656 9.8 CRITICAL libceph: reject buckets with mismatched CRUSH ids
CVE-2026-89655 9.8 CRITICAL ceph: fix UAF in __kick_flushing_caps() on cf entry freed during unlock
CVE-2026-89658 9.8 CRITICAL NFSD: Prevent client use-after-free during NFSv4.0 revoked-state cleanup
CVE-2026-89660 9.8 CRITICAL NFSD: Prevent client use-after-free during admin state revocation
CVE-2026-89659 9.8 CRITICAL NFSD: Prevent client use-after-free during delegation revoke
CVE-2026-89662 9.8 CRITICAL NFSD: Prevent lock owner use-after-free during client teardown
CVE-2026-89669 9.8 CRITICAL nfsd: initialize copy-notify stateid before publishing it
CVE-2026-89674 9.8 CRITICAL nfsd: fix XDR length calculation in nfsd4_ff_encode_layoutget
CVE-2026-89675 9.8 CRITICAL nfsd: fix UAF in async copy cancel and shutdown
CVE-2026-89676 9.8 CRITICAL nfsd: fix stale s2s_cp_stateids IDR entry for async COPY
CVE-2026-89677 9.8 CRITICAL nfsd: fix possible fh_compose of wrong dentry in nfsd4_create_file()
CVE-2026-89681 9.8 CRITICAL nfsd: fix layout fence worker double-reference race
CVE-2026-89686 9.8 CRITICAL nfsd: fix BUG_ON in nfsd4_alloc_layout_stateid on racing delegation revoke
CVE-2026-89703 9.8 CRITICAL nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations
CVE-2026-89479 9.8 CRITICAL sctp: stop processing a packet once its association is deleted
CVE-2026-89478 9.8 CRITICAL sctp: drop a chunk if its transport was removed
CVE-2026-89702 9.8 CRITICAL nfsd: size fh_verify server sockaddr slot by xpt_locallen
CVE-2026-89482 9.8 CRITICAL nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone
CVE-2026-89708 9.8 CRITICAL nfsd: RCU-protect cl_cb_session to fix use-after-free on session teardown

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-2026-89597

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