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CVE-2026-98937— perf/core: Check kernel access when kernel callchains are requested

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： perf/core：当请求内核调用栈时，检查内核访问权限 目前， 仅根据 来限制 的调用。 然而，即使设置了 ，用户仍可通过将 设为 0 来请求收集内核调用栈。虽然这实际上仍需内核分析权限，但现有的检查机制并未对此进行强制验证。 现更新权限检查逻辑：当请求内核采样或内核调用栈时，均调用 。 此举确保权限检查与实际请求的数据保持一致，从而防止未授权用户使用内核调用栈捕获功能。

AI Predicted 6.0 Difficulty: Moderate

Affected Version Matrix 11

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 132bee76097be421ab3012130b5b506324cf2be1 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2581b43e162cfc43e6f5d8dd8d2b38f3441550de affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6e187281f978a2bff98ead6aa40f8ddc9a2c9afb affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< a4573a3838ae4fc73b70019cfa1dac9aaea7cc2f affected
< 6.12.113 affected
< 6.18.56 affected
< 7.2.10 affected
6.12.113≤ 6.12.* unaffected
… +3 more rows
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I. Basic Information for CVE-2026-98937

Vulnerability Information
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Vulnerability Title
perf/core: Check kernel access when kernel callchains are requested
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: perf/core: Check kernel access when kernel callchains are requested perf_event_open() currently gates perf_allow_kernel() only on !attr.exclude_kernel. However, users can still request kernel callchain collection with attr.exclude_callchain_kernel == 0 even when attr.exclude_kernel == 1. That still requires kernel profiling privilege, but the existing check does not enforce it. Update the permission check to call perf_allow_kernel() when either kernel sampling is requested or kernel callchains are requested. This keeps permission checks aligned with requested data and prevents unprivileged use of kernel callchain capture.
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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 132bee76097be421ab3012130b5b506324cf2be1 -
Linux Linux 6.12.113 ~ 6.12.* -

II. Public POCs for CVE-2026-98937

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III. Intelligence Information for CVE-2026-98937

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Patches & Fixes for CVE-2026-98937 (4)

Same Patch Batch · Linux · 2026-10-23 · 218 CVEs total

CVE-2026-98938 rust: irq: pass RegistrationInner as cookie to request_irq
CVE-2026-98951 riscv: ptrace: Zero-initialize regset buffers before copyin
CVE-2026-98950 flow_dissector: avoid u16 truncation of hlen in bpf_flow_dissect()
CVE-2026-98949 drm/imagination: Fix reference and vm_bo handling in remap()
CVE-2026-98948 mlxsw: spectrum_flower: Fix port range register leak in tmplt_create()
CVE-2026-98947 vsock: Fix memory leak in vmci_transport_recv_dgram_cb()
CVE-2026-98946 drm/vc4: Disable the V3D interrupt across runtime suspend
CVE-2026-98945 HID: steam: Rearrange teardown sequence
CVE-2026-98944 HID: steam: Refactor registration
CVE-2026-98943 HID: steam: Clean up locking
CVE-2026-98942 sched_ext: Build the cid tables privately and publish them with RCU
CVE-2026-98941 ext4: don't enable large folios on encrypted inodes
CVE-2026-98940 ASoC: qcom: lpass-cpu: use DAI table index for playback constraints
CVE-2026-98939 x86/mm: Drop unnecessary PMD page copy when freeing
CVE-2026-98926 drm/amd/display: Remove sink usage from DPMS
CVE-2026-98929 macsec: initialize SecY before registering the netdevice
CVE-2026-98928 KVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2
CVE-2026-98927 KVM: arm64: nv: Fix life cycle of the nested_mmus array
CVE-2026-98930 KVM: s390: Fix IRQ injection with SIGP Stop and Store Status
CVE-2026-98925 bpf, sockmap: Fix self-redirect copied_seq double-counting

Showing top 20 of 218 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98937

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