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CVE-2025-21834— seccomp: passthrough uretprobe systemcall without filtering

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seccomp未过滤uretprobe系统调用，可能导致在docker中运行的进程遇到retprobe时崩溃。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1055 · Process Injection

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux ff474a78cef5cb5f32be52fe25b78441327a2e7c< 5a262628f4cf2437d863fe41f9d427177b87664c affected
ff474a78cef5cb5f32be52fe25b78441327a2e7c< fa80018aa5be10c35e9fa896b7b4061a8dce3eed affected
ff474a78cef5cb5f32be52fe25b78441327a2e7c< cf6cb56ef24410fb5308f9655087f1eddf4452e6 affected
6.11 affected
< 6.11 unaffected
6.12.14≤ 6.12.* unaffected
6.13.3≤ 6.13.* unaffected
6.14≤ * unaffected
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I. Basic Information for CVE-2025-21834

Vulnerability Information
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Vulnerability Title
seccomp: passthrough uretprobe systemcall without filtering
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: seccomp: passthrough uretprobe systemcall without filtering When attaching uretprobes to processes running inside docker, the attached process is segfaulted when encountering the retprobe. The reason is that now that uretprobe is a system call the default seccomp filters in docker block it as they only allow a specific set of known syscalls. This is true for other userspace applications which use seccomp to control their syscall surface. Since uretprobe is a "kernel implementation detail" system call which is not used by userspace application code directly, it is impractical and there's very little point in forcing all userspace applications to explicitly allow it in order to avoid crashing tracked processes. Pass this systemcall through seccomp without depending on configuration. Note: uretprobe is currently only x86_64 and isn't expected to ever be supported in i386. [kees: minimized changes for easier backporting, tweaked commit log]
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seccomp未过滤uretprobe系统调用，可能导致在docker中运行的进程遇到retprobe时崩溃。
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 ff474a78cef5cb5f32be52fe25b78441327a2e7c ~ 5a262628f4cf2437d863fe41f9d427177b87664c -
Linux Linux 6.11 -

II. Public POCs for CVE-2025-21834

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III. Intelligence Information for CVE-2025-21834

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Patches & Fixes for CVE-2025-21834 (3)

Same Patch Batch · Linux · 2025-03-06 · 46 CVEs total

CVE-2025-21829 9.8 CRITICAL RDMA/rxe: Fix the warning "__rxe_cleanup+0x12c/0x170 [rdma_rxe]"
CVE-2025-21828 8.8 HIGH wifi: mac80211: don't flush non-uploaded STAs
CVE-2024-58075 7.8 HIGH crypto: tegra - do not transfer req when tegra init fails
CVE-2024-58060 7.8 HIGH bpf: Reject struct_ops registration that uses module ptr and the module btf_id is missing
CVE-2024-58086 7.8 HIGH drm/v3d: Stop active perfmon if it is being destroyed
CVE-2025-21827 7.8 HIGH Bluetooth: btusb: mediatek: Add locks for usb_driver_claim_interface()
CVE-2024-58079 7.8 HIGH media: uvcvideo: Fix crash during unbind if gpio unit is in use
CVE-2025-21826 7.8 HIGH netfilter: nf_tables: reject mismatching sum of field_len with set key length
CVE-2024-58070 7.8 HIGH bpf: bpf_local_storage: Always use bpf_mem_alloc in PREEMPT_RT
CVE-2024-58083 7.8 HIGH KVM: Explicitly verify target vCPU is online in kvm_get_vcpu()
CVE-2025-21825 7.8 HIGH bpf: Cancel the running bpf_timer through kworker for PREEMPT_RT
CVE-2024-58069 7.8 HIGH rtc: pcf85063: fix potential OOB write in PCF85063 NVMEM read
CVE-2025-21832 7.8 HIGH block: don't revert iter for -EIOCBQUEUED
CVE-2024-58053 7.5 HIGH rxrpc: Fix handling of received connection abort
CVE-2025-21830 7.3 HIGH landlock: Handle weird files
CVE-2024-58062 wifi: iwlwifi: mvm: avoid NULL pointer dereference
CVE-2024-58063 wifi: rtlwifi: fix memory leaks and invalid access at probe error path
CVE-2024-58073 drm/msm/dpu: check dpu_plane_atomic_print_state() for valid sspp
CVE-2024-58064 wifi: cfg80211: tests: Fix potential NULL dereference in test_cfg80211_parse_colocated_ap(
CVE-2024-58061 wifi: mac80211: prohibit deactivating all links

Showing top 20 of 46 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21834

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