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CVE-2025-40010— afs: Fix potential null pointer dereference in afs_put_server

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afs_put_server函数中未正确检查空指针，可能导致空指针取消引用。

AI Predicted 4.4 Difficulty: Moderate EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 2757a4dc184997c66ef1de32636f73b9f21aac14< 7b8381f3c405b864a814d747e526e078c3ef4bc2 affected
2757a4dc184997c66ef1de32636f73b9f21aac14< cab278cead49a547ac84c3e185f446f381303eae affected
2757a4dc184997c66ef1de32636f73b9f21aac14< a13dbc5e20c7284b82afe6f08debdecf51d2ca04 affected
2757a4dc184997c66ef1de32636f73b9f21aac14< 41782c44bb8431c43043129ae42f2ba614938479 affected
2757a4dc184997c66ef1de32636f73b9f21aac14< 9158c6bb245113d4966df9b2ba602197a379412e affected
6.0 affected
< 6.0 unaffected
6.1.155≤ 6.1.* unaffected
… +4 more rows
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I. Basic Information for CVE-2025-40010

Vulnerability Information
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Vulnerability Title
afs: Fix potential null pointer dereference in afs_put_server
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: afs: Fix potential null pointer dereference in afs_put_server afs_put_server() accessed server->debug_id before the NULL check, which could lead to a null pointer dereference. Move the debug_id assignment, ensuring we never dereference a NULL server pointer.
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afs_put_server函数中未正确检查空指针，可能导致空指针取消引用。
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 2757a4dc184997c66ef1de32636f73b9f21aac14 ~ 7b8381f3c405b864a814d747e526e078c3ef4bc2 -
Linux Linux 6.0 -

II. Public POCs for CVE-2025-40010

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III. Intelligence Information for CVE-2025-40010

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Same Patch Batch · Linux · 2025-10-20 · 13 CVEs total

CVE-2025-40012 7.8 HIGH net/smc: fix warning in smc_rx_splice() when calling get_page()
CVE-2025-40006 7.8 HIGH mm/hugetlb: fix folio is still mapped when deleted
CVE-2025-40017 media: iris: Fix memory leak by freeing untracked persist buffer
CVE-2025-40015 media: stm32-csi: Fix dereference before NULL check
CVE-2025-40016 media: uvcvideo: Mark invalid entities with id UVC_INVALID_ENTITY_ID
CVE-2025-40013 ASoC: qcom: audioreach: fix potential null pointer dereference
CVE-2025-40011 drm/gma500: Fix null dereference in hdmi teardown
CVE-2025-40009 fs/proc/task_mmu: check p->vec_buf for NULL
CVE-2025-40008 kmsan: fix out-of-bounds access to shadow memory
CVE-2025-40007 netfs: fix reference leak
CVE-2025-40005 spi: cadence-quadspi: Implement refcount to handle unbind during busy
CVE-2025-40004 net/9p: Fix buffer overflow in USB transport layer

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40010

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