CVE-2026-90347— arm64: ptrace: Keep 'orig_x0' in-sync with x0 on syscall entry
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： arm64: ptrace: 在系统调用入口保持 'orig_x0' 与 x0 同步 提交 e057b9477232（“arm64: syscall: 确保保存的 x0 与追踪者的更新保持同步”）试图解决一个长期存在的系统调用入口追踪问题：追踪者（tracer）能够操纵第一个系统调用参数，却未受到 seccomp 或 audit 检查的约束。 不幸的是，该修复并不完整 [1]，因为它未能更新 'orig_x0'。具体来说，在追踪者通过 ptrace 更新 x0（对应 S
Possible ATT&CK Techniques 2 AI
T1531 · Account Access Removal T1055.001 · Dynamic-link Library InjectionAffected Version Matrix 6
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615< f433869f23841a50455c4087d85540d5b4d37cde |
affected |
a5cd110cb8369d6b37ef5ccfe56b3fa1338c9615< 88b839ce497ccb1ff92f7ae742c78dd2937ba572 |
affected | ||
4.8 |
affected | ||
< 4.8 |
unaffected | ||
7.2.6≤ 7.2.* |
unaffected | ||
7.3-rc1≤ * |
unaffected |
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I. Basic Information for CVE-2026-90347
Vulnerability Information
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Vulnerability Title
arm64: ptrace: Keep 'orig_x0' in-sync with x0 on syscall entry
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
arm64: ptrace: Keep 'orig_x0' in-sync with x0 on syscall entry
Commit e057b9477232 ("arm64: syscall: Ensure saved x0 is kept in-sync
with tracer updates") attempted to resolve a long-standing issue with
syscall entry tracing, where a tracer is able to manipulate the first
syscall argument without being subjected to seccomp or audit checking.
Unfortunately, that fix was incomplete [1], as it failed to update
'orig_x0' between a tracer updating x0 during a seccomp ptrace exit
(SECCOMP_RET_TRACE) and the seccomp filter being re-evaluated.
Rather than add hooks to the core seccomp code, instead move the
synchronisation code into the ptrace GPR and syscall setting code so
that 'orig_x0' is kept up to date with x0 whenever we're stopped on the
syscall entry path.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-90347
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-90347 (2)
Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total
| CVE-2026-90104 | 9.8 CRITICAL | NFSv4.1: zero referring call lists before decoding |
| CVE-2026-90151 | 9.8 CRITICAL | NFSv4: remove callback IDR entry on client allocation failure |
| CVE-2026-90173 | 9.8 CRITICAL | smb: smbdirect: free completion queues with ib_free_cq() |
| CVE-2026-92489 | 9.8 CRITICAL | xfrm: Fix skb double-free in xfrm_dev_direct_output() |
| CVE-2026-90235 | 9.8 CRITICAL | sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE |
| CVE-2026-90110 | 9.4 CRITICAL | inetpeer: randomize RB-tree node comparison using SipHash |
| CVE-2026-90414 | 9.1 CRITICAL | IB/isert: reject PDUs declaring more data than was received |
| CVE-2026-90230 | 9.1 CRITICAL | nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate() |
| CVE-2026-90413 | 9.1 CRITICAL | IB/isert: reject login PDUs declaring more data than was received |
| CVE-2026-90240 | 8.8 HIGH | iommu/vt-d: Flush context cache with correct SID when tearing down aliases |
| CVE-2026-90381 | 8.8 HIGH | wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx() |
| CVE-2026-90286 | 8.8 HIGH | drm/amdgpu/gfx6: Use PFP on the compute queues too |
| CVE-2026-90425 | 8.8 HIGH | iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID |
| CVE-2026-90380 | 8.8 HIGH | wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete |
| CVE-2026-90256 | 8.8 HIGH | Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind |
| CVE-2026-90255 | 8.8 HIGH | Bluetooth: hci_conn: fix the SCO setup context lifetime |
| CVE-2026-90379 | 8.8 HIGH | wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash |
| CVE-2026-93042 | 8.8 HIGH | dmaengine: dw-edma: Terminate all descriptors without callbacks |
| CVE-2026-90162 | 8.8 HIGH | ksmbd: defer publishing granted locks to prevent UAF/double-free race |
| CVE-2026-93189 | 8.8 HIGH | HID: core: quiesce input in hid_hw_stop() to prevent use-after-free |
Showing top 20 of 600 CVEs. View all on vendor page → →
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Same vendor: Linux
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CVE-2026-98384
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bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
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bpf: Reject dev-bound-only programs on other devices -
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V. Comments for CVE-2026-90347
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