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CVE-2025-21968— drm/amd/display: Fix slab-use-after-free on hdcp_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drm/amd/display模块在hdcp_work中存在slab释放后重用问题。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.19% · P9

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux da3fd7ac0bcf372cc57117bdfcd725cca7ef975a< 06acfdef370ae018dad9592369e2d2fd9a40c09e affected
da3fd7ac0bcf372cc57117bdfcd725cca7ef975a< 1397715b011bcdc6ad91b17df7acaee301e89db5 affected
da3fd7ac0bcf372cc57117bdfcd725cca7ef975a< 4964dbc4191ab436877a5e3ecd9c67a4e50b7c36 affected
da3fd7ac0bcf372cc57117bdfcd725cca7ef975a< 378b361e2e30e9729f9a7676f7926868d14f4326 affected
da3fd7ac0bcf372cc57117bdfcd725cca7ef975a< bac7b8b1a3f1a86eeec85835af106cbdc2b9d9f7 affected
da3fd7ac0bcf372cc57117bdfcd725cca7ef975a< 93d701064e56788663d7c5918fbe5e060d5df587 affected
da3fd7ac0bcf372cc57117bdfcd725cca7ef975a< e65e7bea220c3ce8c4c793b4ba35557f4994ab2b affected
5.5 affected
… +8 more rows
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I. Basic Information for CVE-2025-21968

Vulnerability Information
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Vulnerability Title
drm/amd/display: Fix slab-use-after-free on hdcp_work
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix slab-use-after-free on hdcp_work [Why] A slab-use-after-free is reported when HDCP is destroyed but the property_validate_dwork queue is still running. [How] Cancel the delayed work when destroying workqueue. (cherry picked from commit 725a04ba5a95e89c89633d4322430cfbca7ce128)
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drm/amd/display模块在hdcp_work中存在slab释放后重用问题。
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 da3fd7ac0bcf372cc57117bdfcd725cca7ef975a ~ 06acfdef370ae018dad9592369e2d2fd9a40c09e -
Linux Linux 5.5 -

II. Public POCs for CVE-2025-21968

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III. Intelligence Information for CVE-2025-21968

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Patches & Fixes for CVE-2025-21968 (3)

Same Patch Batch · Linux · 2025-04-01 · 93 CVEs total

CVE-2025-21954 9.8 CRITICAL netmem: prevent TX of unreadable skbs
CVE-2025-21927 9.8 CRITICAL nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()
CVE-2025-21955 8.8 HIGH ksmbd: prevent connection release during oplock break notification
CVE-2025-21946 8.8 HIGH ksmbd: fix out-of-bounds in parse_sec_desc()
CVE-2025-21945 8.8 HIGH ksmbd: fix use-after-free in smb2_lock
CVE-2025-21969 8.8 HIGH Bluetooth: L2CAP: Fix slab-use-after-free Read in l2cap_send_cmd
CVE-2025-21972 8.8 HIGH net: mctp: unshare packets when reassembling
CVE-2025-21967 8.8 HIGH ksmbd: fix use-after-free in ksmbd_free_work_struct
CVE-2025-21947 8.1 HIGH ksmbd: fix type confusion via race condition when using ipc_msg_send_request
CVE-2025-21896 7.8 HIGH fuse: revert back to __readahead_folio() for readahead
CVE-2025-21949 7.8 HIGH LoongArch: Set hugetlb mmap base address aligned with pmd size
CVE-2025-21899 7.8 HIGH tracing: Fix bad hist from corrupting named_triggers list
CVE-2025-21979 7.8 HIGH wifi: cfg80211: cancel wiphy_work before freeing wiphy
CVE-2025-21966 7.8 HIGH dm-flakey: Fix memory corruption in optional corrupt_bio_byte feature
CVE-2025-21926 7.8 HIGH net: gso: fix ownership in __udp_gso_segment
CVE-2025-21965 7.8 HIGH sched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl()
CVE-2025-21971 7.8 HIGH net_sched: Prevent creation of classes with TC_H_ROOT
CVE-2025-21934 7.8 HIGH rapidio: fix an API misues when rio_add_net() fails
CVE-2025-21939 7.8 HIGH drm/xe/hmm: Don't dereference struct page pointers without notifier lock
CVE-2025-21958 7.8 HIGH Revert "openvswitch: switch to per-action label counting in conntrack"

Showing top 20 of 93 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21968

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