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CVE-2026-80924— crypto: krb5 - use kfree_sensitive() for derived key buffers

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： crypto: krb5 - 对派生密钥缓冲区使用 kfree_sensitive() 和 使用普通的 释放持有新派生密钥的缓冲区，导致密钥材料残留在已释放的 slab 对象中。

AI Predicted 5.3 Difficulty: Hard

Possible ATT&CK Techniques 1 AI

T1529 · System Shutdown/Reboot

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 3936f02bf2d3308a7359dd37dd96cd60603d8170< 731a5b6fb4c1705f9405d9029dd64ea81e336207 affected
3936f02bf2d3308a7359dd37dd96cd60603d8170< 91b96dc9cc250cd16751f53de525cf3442ca0962 affected
3936f02bf2d3308a7359dd37dd96cd60603d8170< a1bf79365794783b19f5b09e8a23f7ee311e8931 affected
3936f02bf2d3308a7359dd37dd96cd60603d8170< f7d53dd3f267e46a784f219a75072f2f400d42b9 affected
6.15 affected
< 6.15 unaffected
6.18.49≤ 6.18.* unaffected
7.1.13≤ 7.1.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-80924

Vulnerability Information
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Vulnerability Title
crypto: krb5 - use kfree_sensitive() for derived key buffers
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: crypto: krb5 - use kfree_sensitive() for derived key buffers crypto_krb5_prepare_encryption() and crypto_krb5_prepare_checksum() free the buffer holding the freshly derived keys with plain kfree(), leaving the key material behind in the freed slab object.
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 3936f02bf2d3308a7359dd37dd96cd60603d8170 ~ 731a5b6fb4c1705f9405d9029dd64ea81e336207 -
Linux Linux 6.15 -

II. Public POCs for CVE-2026-80924

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III. Intelligence Information for CVE-2026-80924

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Patches & Fixes for CVE-2026-80924 (4)

Same Patch Batch · Linux · 2026-09-09 · 12 CVEs total

CVE-2026-80925 vlan: fix skb_under_panic and races when toggling HW VLAN offload
CVE-2026-80923 xhci: dbgtty: Fix unregister on tty_register_driver() failure
CVE-2026-80922 crypto: qcom-rng - Allow zero as a random number
CVE-2026-80921 KVM: s390: vsie: zero stale crypto bits
CVE-2026-80920 io_uring: defer eventfd signaling when queued from a wakeup handler
CVE-2026-80919 drm/amdgpu: fix recursive ww_mutex acquire in amdgpu_devcoredump_format
CVE-2026-80918 HID: core: fix number/pointer type confusion on long items
CVE-2026-80917 PCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems
CVE-2026-80916 kcov: fix data corruption and race conditions on PREEMPT_RT
CVE-2026-80915 drm/xe: Fix DPT allocation paths.
CVE-2026-80914 Bluetooth: ISO: fix use-after-free of listener socket in iso_conn_ready

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80924

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