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CVE-2026-98057— ring-buffer: Add checking nr_subbufs to persistent ring buffer validation

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： 环形缓冲区（ring-buffer）：在持久化环形缓冲区的验证逻辑中增加对 nr_subbufs 的检查 Sashiko 报告指出，现有代码在未确保 meta->nr_subbufs 与数据所假设的 nr_pages + 1 相匹配的情况下，直接使用了 meta->nr_subbufs，从而隐含地假定二者相等。 为此，在持久化环形缓冲区的验证代码中增加了一项检查，以确保保存的 nr_subbufs 值符合预期。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.17% · P5

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 11

VendorProduct Version RangeStatus
Linux Linux 3ec743d558f111d8999aea24577ba66c65ee2eeb< f0467190e6a9fc61e343c8064ef16aad513788c3 affected
f5b95f1fa2ef3a03f49eeec658ba97e721412b32< 69d502457e3f76142f7fcf6e2625e80e0ce8a60f affected
f5b95f1fa2ef3a03f49eeec658ba97e721412b32< 6c001a62c34f13fe1c6a24304c289b387d9e697d affected
0d547a6f5e8fad26ebc12f501d7d19fccdbad6bf affected
6.12.16< 6.12.111 affected
6.13.4< 6.14 affected
6.14 affected
< 6.14 unaffected
… +3 more rows
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I. Basic Information for CVE-2026-98057

Vulnerability Information
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Vulnerability Title
ring-buffer: Add checking nr_subbufs to persistent ring buffer validation
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Add checking nr_subbufs to persistent ring buffer validation Sashiko reported that the code was using meta->nr_subbufs without making sure that it matched the nr_pages + 1 on data that was assuming the two were the same. Add a check to the persistent ring buffer validation code to make sure that the saved nr_subbufs matches what we expect.
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 3ec743d558f111d8999aea24577ba66c65ee2eeb ~ f0467190e6a9fc61e343c8064ef16aad513788c3 -
Linux Linux 6.14 -

II. Public POCs for CVE-2026-98057

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III. Intelligence Information for CVE-2026-98057

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Patches & Fixes for CVE-2026-98057 (3)

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-2026-98057

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