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CVE-2026-98948— mlxsw: spectrum_flower: Fix port range register leak in tmplt_create()

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： mlxsw: spectrum_flower: 修复 tmplt_create() 中的端口范围寄存器泄漏问题 mlxsw_sp_flower_tmplt_create() 函数会将 flow_cls_offload 模板解析到一个栈局部结构体 struct mlxsw_sp_acl_rule_info 中，其目的仅为计算 rulei.values.elusage。该解析过程可能通过 mlxsw_sp_flower_parse_ports_range() 获取端口范围寄

AI Predicted 5.5 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux fe22f7410527c2077223b5fd0fc0458db912f0db< 41ad5bcf0219aaebf8ffb052c5e8177479330cde affected
fe22f7410527c2077223b5fd0fc0458db912f0db< c8e934287debb29c6ded86b21e49fc72e186d15e affected
fe22f7410527c2077223b5fd0fc0458db912f0db< 3938430f0237c59ca08d6a366e7657b2b7f8d0bb affected
fe22f7410527c2077223b5fd0fc0458db912f0db< 4eaf1285b5c1e42f80e47f9fe0d391e70418db02 affected
fe22f7410527c2077223b5fd0fc0458db912f0db< 7ea07afb230f1342ab0f9365edd0aae137f425d3 affected
6.6 affected
< 6.6 unaffected
6.6.160≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-98948

Vulnerability Information
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Vulnerability Title
mlxsw: spectrum_flower: Fix port range register leak in tmplt_create()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_flower: Fix port range register leak in tmplt_create() mlxsw_sp_flower_tmplt_create() parses a flow_cls_offload template into a stack-local struct mlxsw_sp_acl_rule_info purely to compute rulei.values.elusage. Parsing can acquire port range registers via mlxsw_sp_flower_parse_ports_range(), but since this rulei never goes through mlxsw_sp_acl_rulei_destroy(), those registers were never released, including through chain template deletion. Factor out of mlxsw_sp_acl_rulei_destroy() the code to actually release the necessary resources and call from mlxsw_sp_flower_tmplt_create() to plug the leak. The issue was found during a review of Wentao Liang's patch referenced below.
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 fe22f7410527c2077223b5fd0fc0458db912f0db ~ 41ad5bcf0219aaebf8ffb052c5e8177479330cde -
Linux Linux 6.6 -

II. Public POCs for CVE-2026-98948

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III. Intelligence Information for CVE-2026-98948

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Patches & Fixes for CVE-2026-98948 (3)

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

CVE-2026-98937 perf/core: Check kernel access when kernel callchains are requested
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-2026-98947 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-2026-98938 rust: irq: pass RegistrationInner as cookie to request_irq
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

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