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CVE-2026-89899— media: cec: disable delayed work before freeing an interrupted transmit

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.

以下是该 Linux 内核漏洞描述信息的中文翻译： 在 Linux 内核中，已修复以下漏洞： media: cec: 在释放被中断的传输之前禁用延迟工作项 函数在 中等待阻塞式传输完成时，会释放 锁。如果该等待过程被信号中断， 可能在 CEC 内核线程通过 中的 为回复超时设置延迟工作项之前执行。 这导致延迟工作项在取消操作之后才被重新激活（armed），而数据结构 在延迟工作项仍处于待处理状态时就被释放了： 解决方案是使用 ：它不仅能取消延迟工作项，还会将其禁用。这样，后续的 调用将变为空操作（no-op），从而

CVSS 7.8 · High EPSS 0.18% · P6

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 490d84f6d73c12f4204241cff8651eed60aae914< 9a951931d4b4084acd64fa55fc3672a9da45ddf9 affected
490d84f6d73c12f4204241cff8651eed60aae914< a3adb63b121937b97f7fdc51e96564c7c799538b affected
490d84f6d73c12f4204241cff8651eed60aae914< 9c6ceb0949227c1f0cf0e19393daec72d9889871 affected
490d84f6d73c12f4204241cff8651eed60aae914< 0fbd5c2327020858c45b2d1c65775d64cdeca523 affected
e448dfd6d3ec944411f6575bc24e4f8baa1e297f affected
2781b86d7e45de09befa5ace296b66787146561f affected
4.18.19< 4.19 affected
4.19.2< 4.20 affected
… +6 more rows
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I. Basic Information for CVE-2026-89899

Vulnerability Information
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Vulnerability Title
media: cec: disable delayed work before freeing an interrupted transmit
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: cec: disable delayed work before freeing an interrupted transmit cec_transmit_msg_fh() drops adap->lock to wait for a blocking transmit in wait_for_completion_killable(). If that wait is interrupted by a signal, cancel_delayed_work_sync() can run before the CEC kthread arms the reply timeout via schedule_delayed_work(&data->work) in cec_transmit_done_ts(). The work is then armed after the cancel, and the data is freed with its delayed_work still pending: ODEBUG: free active (active state 0) object: ... hint: cec_wait_timeout Use disable_delayed_work_sync(): it cancels the work and disables it, so the later schedule_delayed_work() becomes a no-op and the work cannot be re-armed. The data is freed right after, so it need not be re-enabled.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 490d84f6d73c12f4204241cff8651eed60aae914 ~ 9a951931d4b4084acd64fa55fc3672a9da45ddf9 -
Linux Linux 4.20 -

II. Public POCs for CVE-2026-89899

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III. Intelligence Information for CVE-2026-89899

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Other References for CVE-2026-89899 (4)

Same Patch Batch · Linux · 2026-09-16 · 276 CVEs total

CVE-2026-90048 9.8 CRITICAL fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()
CVE-2026-90012 9.8 CRITICAL spi: Fix DMA mapping ownership on partial map failure
CVE-2026-89970 9.8 CRITICAL nvmet-auth: Synchronize timeout work during SQ teardown
CVE-2026-89857 9.8 CRITICAL scsi: qla2xxx: Hold qpair lock when sending NVMe LS reject
CVE-2026-89969 9.8 CRITICAL nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU
CVE-2026-89847 9.8 CRITICAL scsi: qla2xxx: Avoid double completion in async IOCB timeout
CVE-2026-89972 9.8 CRITICAL nvme: add missing SRCU grace period in error path
CVE-2026-89990 9.8 CRITICAL ceph: lock mutex in ceph_mds_check_access()
CVE-2026-90036 9.8 CRITICAL NFSD: Prevent client use-after-free during blocked-lock reaping
CVE-2026-90038 9.8 CRITICAL NFSD: Prevent client use-after-free during export state revocation
CVE-2026-90037 9.8 CRITICAL NFSD: Prevent client use-after-free during close_lru reaping
CVE-2026-89788 9.8 CRITICAL ksmbd: fix tree connection use-after-free in smb2_tree_connect()
CVE-2026-89783 9.8 CRITICAL xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full
CVE-2026-90042 9.8 CRITICAL ceph: properly decrypt filenames in vmalloc() buffers
CVE-2026-89778 9.8 CRITICAL isofs: fix out-of-bounds page array access on empty zisofs block
CVE-2026-89915 9.3 CRITICAL KVM: arm64: Remove VM-wide VNCR mapping counter
CVE-2026-90049 9.3 CRITICAL net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy()
CVE-2026-89775 9.3 CRITICAL KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation
CVE-2026-89916 9.3 CRITICAL KVM: arm64: Make VNCR invalidation participate in MMU invalidation retry
CVE-2026-89930 9.3 CRITICAL KVM: nVMX: Service local TLB flushes on failed nested VM-Enter

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-89899

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