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CVE Record

CVE-2025-68265: nvme: fix admin request_queue lifetime

In the Linux kernel, the following vulnerability has been resolved: nvme: fix admin request_queue lifetime The namespaces can access the controller's admin request_queue, and stale references on the namespaces may exist after tearing down the controller. Ensure the admin request_queue is active by moving the controller's 'put' to after all controller references have been released to ensure no one is can access the request_queue. This fixes a reported use-after-free bug: BUG: KASAN: slab-use-after-free in blk_queue_enter+0x41c/0x4a0 Read of size 8 at addr ffff88c0a53819f8 by task nvme/3287 CPU: 67 UID: 0 PID: 3287 Comm: nvme Tainted: G E 6.13.2-ga1582f1a031e #15 Tainted: [E]=UNSIGNED_MODULE Hardware name: Jabil /EGS 2S MB1, BIOS 1.00 06/18/2025 Call Trace: <TASK> dump_stack_lvl+0x4f/0x60 print_report+0xc4/0x620 ? _raw_spin_lock_irqsave+0x70/0xb0 ? _raw_read_unlock_irqrestore+0x30/0x30 ? blk_queue_enter+0x41c/0x4a0 kasan_report+0xab/0xe0 ? blk_queue_enter+0x41c/0x4a0 blk_queue_enter+0x41c/0x4a0 ? __irq_work_queue_local+0x75/0x1d0 ? blk_queue_start_drain+0x70/0x70 ? irq_work_queue+0x18/0x20 ? vprintk_emit.part.0+0x1cc/0x350 ? wake_up_klogd_work_func+0x60/0x60 blk_mq_alloc_request+0x2b7/0x6b0 ? __blk_mq_alloc_requests+0x1060/0x1060 ? __switch_to+0x5b7/0x1060 nvme_submit_user_cmd+0xa9/0x330 nvme_user_cmd.isra.0+0x240/0x3f0 ? force_sigsegv+0xe0/0xe0 ? nvme_user_cmd64+0x400/0x400 ? vfs_fileattr_set+0x9b0/0x9b0 ? cgroup_update_frozen_flag+0x24/0x1c0 ? cgroup_leave_frozen+0x204/0x330 ? nvme_ioctl+0x7c/0x2c0 blkdev_ioctl+0x1a8/0x4d0 ? blkdev_common_ioctl+0x1930/0x1930 ? fdget+0x54/0x380 __x64_sys_ioctl+0x129/0x190 do_syscall_64+0x5b/0x160 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7f765f703b0b Code: ff ff ff 85 c0 79 9b 49 c7 c4 ff ff ff ff 5b 5d 4c 89 e0 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d dd 52 0f 00 f7 d8 64 89 01 48 RSP: 002b:00007ffe2cefe808 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffe2cefe860 RCX: 00007f765f703b0b RDX: 00007ffe2cefe860 RSI: 00000000c0484e41 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000000 R10: 00007f765f611d50 R11: 0000000000000202 R12: 0000000000000003 R13: 00000000c0484e41 R14: 0000000000000001 R15: 00007ffe2cefea60 </TASK>

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue is a use-after-free in NVMe controller teardown. It can leave namespaces holding stale access to an admin request queue after the controller is torn down. The sources do not provide CVSS, business impact, or confirmed exploitation, so urgency should be based on whether affected kernels and NVMe storage are present.

Executive priority

Treat this as a targeted kernel maintenance item, not an emergency based on current evidence. Prioritize patch validation for NVMe-heavy servers, appliances, and Siemens environments, while watching vendor advisories for severity clarification.

Technical view

The resolved bug moves the controller put later so all controller references are released before the admin request_queue can be freed. The reported KASAN trace shows slab-use-after-free in blk_queue_enter during an NVMe ioctl path. Affected Linux version data is present, but severity and exploitability are not scored in the bundle.

Likely exposure

Exposure appears limited to Linux systems running affected kernel versions with NVMe controller and namespace activity. The bundle lists Linux as affected and references stable kernel fixes plus Siemens advisories, but it does not identify specific Siemens products or deployment conditions.

Exploitation context

No active exploitation is supported by the provided sources. KEV is false, and the bundle only shows a reported KASAN use-after-free trace, not public exploit activity or a weaponized path.

Researcher notes

Evidence supports a lifetime bug in the NVMe admin request_queue during controller teardown. The source bundle lacks CVSS, CWE, exploit prerequisites, and full affected product mapping. Avoid extrapolating beyond Linux kernel NVMe paths and the referenced advisories.

Mitigation direction

  • Apply the relevant Linux stable kernel update containing the admin request_queue lifetime fix.
  • Check Linux distribution and appliance vendor advisories for packaged kernel availability.
  • Prioritize systems using NVMe storage in production or safety-sensitive environments.
  • Review the referenced Siemens advisories if Siemens-managed systems are in scope.

Validation and detection

  • Inventory Linux kernel versions against the affected version data in the CVE bundle.
  • Confirm whether exposed systems use NVMe storage controllers and namespaces.
  • Verify the installed kernel includes one of the referenced stable fixes.
  • Monitor kernel logs for NVMe teardown or KASAN use-after-free indicators.
Prepared
Confidence
medium
Sources
9

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2025-68265 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
1ADP providers
8Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxfe60e8c534118a288cd251a59d747cbf5c03e160, fe60e8c534118a288cd251a59d747cbf5c03e160, fe60e8c534118a288cd251a59d747cbf5c03e160, fe60e8c534118a288cd251a59d747cbf5c03e160, fe60e8c534118a288cd251a59d747cbf5c03e160unaffected
LinuxLinux6.1, 0, 6.1.168, 6.6.120, 6.12.62, 6.17.12, 6.18affected
Weakness

CWE details

No CWE listed

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