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CVE-2026-98113— ksmbd: rate limit unmapped SID errors

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，已修复以下漏洞： ksmbd：对未映射的 SID 错误进行速率限制 攻击者可在 DACL（离散访问控制列表）中包含大量结构合法但未映射的 SID（安全标识符）。每次映射失败都会记录一条日志，导致单个请求可能产生数百条内核错误消息。 为防止已认证客户端通过频繁发送此类请求淹没内核日志，对上述消息进行速率限制。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.21% · P10

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< 3005d43143096321cc857645a9d48ef4ffde8bcf affected
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< 674aabf554bdaffcf25f145bf32c8b4f510f7916 affected
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< 486876f957456721b5e51af532235db4c6f7bd47 affected
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< 13af319c1efec0b45fb5c1b16830eb0888b3fd1e affected
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< 30dbb08777b9a611d7d9193c040f382fbd0e7562 affected
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< 54cb2a909996346ac6a8a3beac96c07b3dcba584 affected
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< feca5e70fc963b088377b20879e8cd8237c2fd7d affected
5.15 affected
… +8 more rows
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I. Basic Information for CVE-2026-98113

Vulnerability Information
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Vulnerability Title
ksmbd: rate limit unmapped SID errors
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: rate limit unmapped SID errors A client can include many structurally valid but unmapped SIDs in a DACL. Logging every mapping failure lets one request generate hundreds of kernel error messages. Rate limit the message to prevent an authenticated client from flooding the kernel 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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 ~ 3005d43143096321cc857645a9d48ef4ffde8bcf -
Linux Linux 5.15 -

II. Public POCs for CVE-2026-98113

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III. Intelligence Information for CVE-2026-98113

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Patches & Fixes for CVE-2026-98113 (7)

Same Patch Batch · Linux · 2026-09-25 · 372 CVEs total

CVE-2026-100075 9.8 CRITICAL RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters
CVE-2026-97555 8.8 HIGH smb: client: fix heap overflow in DACL owner/group rewrite
CVE-2026-97957 8.8 HIGH net: hinic: fix mailbox segment buffer overflow
CVE-2026-97527 8.8 HIGH scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock
CVE-2026-97528 8.8 HIGH scsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error
CVE-2026-98115 8.8 HIGH ksmbd: safely drain sessions during logoff
CVE-2026-97525 8.2 HIGH x86/mm/pat: Allocate split page tables as kernel page tables
CVE-2026-98069 8.1 HIGH net/rds: acquire the fastpath locks in rds_conn_shutdown()
CVE-2026-97573 8.1 HIGH bnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset()
CVE-2026-97570 8.1 HIGH bnxt_en: Bound SW TPA IDs to prevent crashes
CVE-2026-98130 8.1 HIGH sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START
CVE-2026-98070 8.1 HIGH net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks()
CVE-2026-98002 7.8 HIGH iommu/amd: Fix ineffective error check in nested domain allocation
CVE-2026-97575 7.8 HIGH media: v4l2-ctrls: validate AV1 tile counts
CVE-2026-97576 7.8 HIGH media: v4l2-ctrls: validate HEVC tile counts
CVE-2026-97941 7.8 HIGH mm/slab: take n->list_lock in __slab_try_return_freelist() to avoid race
CVE-2026-98112 7.8 HIGH ksmbd: fix listener task lifetime on netdev events
CVE-2026-97937 7.8 HIGH ftrace: fork: Initialize function graph state before copy_exec_state()
CVE-2026-97580 7.8 HIGH media: rkvdec: bound HEVC tile loops and PPS id to the array capacity
CVE-2026-97940 7.8 HIGH ipv6: fix fib6 walker UAF on seq stop

Showing top 20 of 372 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98113

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