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CVE-2026-89897— media: cec: Serialize exclusive follower delivery

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.

在 Linux 内核中，以下漏洞已得到修复： 媒体：CEC：对独占跟随者（exclusive follower）的投递进行串行化 函数在未持有适配器锁的情况下读取了独占跟随者指针。现已将对“无跟随者”的检查及消息投递过程进行串行化，以防止其与模式切换及释放操作发生竞争条件。

CVSS 7.5 · High EPSS 0.36% · P27

Possible ATT&CK Techniques 1 AI

T1001 · Data Obfuscation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 9881fe0ca187c213eb3a6a8e78e45ad4d1cec171< efc829b4b937f98c4467bffe9243f756b7cfbf7f affected
9881fe0ca187c213eb3a6a8e78e45ad4d1cec171< cac577854826950dda4d53569728b1da6c1425d5 affected
9881fe0ca187c213eb3a6a8e78e45ad4d1cec171< 4b532b271c91790b7ab661cd488a7ad36f5c4f6b affected
9881fe0ca187c213eb3a6a8e78e45ad4d1cec171< 271e57a936dcdbaecb4b1bd005d9a285bbe60ab4 affected
9881fe0ca187c213eb3a6a8e78e45ad4d1cec171< df941e6851da17fc53c7f6af2bdcc7383d17babc affected
9881fe0ca187c213eb3a6a8e78e45ad4d1cec171< 5c62095acc2a952099688774513c4a637bcdb2b5 affected
9881fe0ca187c213eb3a6a8e78e45ad4d1cec171< ae614f48712156fb0f55b207338d48d422c58bc0 affected
9881fe0ca187c213eb3a6a8e78e45ad4d1cec171< 1924d0788caa6c66fd320dd4704fae99487fd2c7 affected
… +10 more rows
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I. Basic Information for CVE-2026-89897

Vulnerability Information
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Vulnerability Title
media: cec: Serialize exclusive follower delivery
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: cec: Serialize exclusive follower delivery cec_receive_notify() reads the exclusive follower pointer without the adapter lock. Serialize the no-follower check and message delivery against mode changes and release.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/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 9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 ~ efc829b4b937f98c4467bffe9243f756b7cfbf7f -
Linux Linux 4.8 -

II. Public POCs for CVE-2026-89897

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III. Intelligence Information for CVE-2026-89897

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Other References for CVE-2026-89897 (8)

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

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