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CVE-2026-89797— power: supply: ab8500_fg: fix use-after-free on remove

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，已修复以下漏洞： 电源：电源驱动：ab8500_fg：修复移除时的释放后使用（use-after-free）问题 函数在销毁驱动的工作队列（workqueue）时，线程化的中断处理程序仍然处于激活状态。这些中断处理程序由 管理，只有在 返回之后才会被释放。因此，如果在此时间窗口内触发中断，处理程序会在已释放的工作队列上提交工作项，从而导致“释放后使用”（use-after-free）错误。 修复方案： 改为通过 来销毁工作队列，并将其清理操作注册在电源供应器（power supply）之后、

AI Predicted 6.2 Difficulty: Moderate EPSS 0.21% · P10

Possible ATT&CK Techniques 2 AI

T1614 · System Location Discovery T1604

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 13151631b5bd06a1511353bb221079bbd76606c3< c2ce9b8f325f522e10e4d262b37ae49deb83e79b affected
13151631b5bd06a1511353bb221079bbd76606c3< c660c017dec1fd7cd88e1103c5ae1aae6ce636bf affected
13151631b5bd06a1511353bb221079bbd76606c3< 013731074ab6a8d11ec209eee64c5b2656954479 affected
13151631b5bd06a1511353bb221079bbd76606c3< 75b1e88d34254f4fb7753345e21bfee47abddd7f affected
3.4 affected
< 3.4 unaffected
6.12.112≤ 6.12.* unaffected
6.18.51≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-89797

Vulnerability Information
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Vulnerability Title
power: supply: ab8500_fg: fix use-after-free on remove
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: power: supply: ab8500_fg: fix use-after-free on remove ab8500_fg_remove() destroys the driver workqueue while the threaded interrupt handlers are still armed; they are devm-managed and freed only after ->remove() returns, so a handler that fires in that window queues work on the freed workqueue. Tear the workqueue down through devm instead, registering its cleanup after the power supply and before the interrupt requests. devm then frees the interrupts first, so the handlers can no longer queue work, before disabling the delayed and plain work items and destroying the workqueue. Disabling the items, rather than cancelling them, keeps them disabled so no producer (including the power-supply external_power_changed callback) can requeue them. Found by an in-house static analysis tool.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 13151631b5bd06a1511353bb221079bbd76606c3 ~ c2ce9b8f325f522e10e4d262b37ae49deb83e79b -
Linux Linux 3.4 -

II. Public POCs for CVE-2026-89797

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III. Intelligence Information for CVE-2026-89797

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Patches & Fixes for CVE-2026-89797 (1)

Other References for CVE-2026-89797 (3)

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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