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CVE-2025-68324— scsi: imm: Fix use-after-free bug caused by unfinished delayed work

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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未完成的延迟工作导致释放后重用，可能造成内存损坏。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 31ab2aad7a7b7501e904a09bf361e44671f66092 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 48dd41fa2d6c6a0c50e714deeba06ffe7f91961b affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 9e434426cc23ad5e2aad649327b59aea00294b13 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< ab58153ec64fa3fc9aea09ca09dc9322e0b54a7c affected
2.6.12 affected
< 2.6.12 unaffected
6.12.63≤ 6.12.* unaffected
6.17.13≤ 6.17.* unaffected
… +2 more rows
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I. Basic Information for CVE-2025-68324

Vulnerability Information
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Vulnerability Title
scsi: imm: Fix use-after-free bug caused by unfinished delayed work
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: scsi: imm: Fix use-after-free bug caused by unfinished delayed work The delayed work item 'imm_tq' is initialized in imm_attach() and scheduled via imm_queuecommand() for processing SCSI commands. When the IMM parallel port SCSI host adapter is detached through imm_detach(), the imm_struct device instance is deallocated. However, the delayed work might still be pending or executing when imm_detach() is called, leading to use-after-free bugs when the work function imm_interrupt() accesses the already freed imm_struct memory. The race condition can occur as follows: CPU 0(detach thread) | CPU 1 | imm_queuecommand() | imm_queuecommand_lck() imm_detach() | schedule_delayed_work() kfree(dev) //FREE | imm_interrupt() | dev = container_of(...) //USE dev-> //USE Add disable_delayed_work_sync() in imm_detach() to guarantee proper cancellation of the delayed work item before imm_struct is deallocated.
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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未完成的延迟工作导致释放后重用，可能造成内存损坏。
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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 9a8e53154353580d53f7f86a253927e41294017e -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2025-68324

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III. Intelligence Information for CVE-2025-68324

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Other References for CVE-2025-68324 (5)

Same Patch Batch · Linux · 2025-12-18 · 3 CVEs total

CVE-2025-68323 usb: typec: ucsi: fix use-after-free caused by uec->work
CVE-2025-68325 net/sched: sch_cake: Fix incorrect qlen reduction in cake_drop

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-68324

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