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CVE-2026-97548— xfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions

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： xfs：修复 rtrmap 和 rtrefcount 的 _maxlevels_ondisk 函数 _maxlevels_ondisk 函数用于计算每种 btree 类型的内存中 btree 游标的大小。不幸的是，LLollM 发现 rtrmap 和 rtrefcount 版本的这些函数忘记了考虑 inode 根节点，这意味着在 btree 足够大的情况下，可能会访问超出游标末尾的内存。现予以修复。

CVSS 7.8 · High EPSS 0.17% · P6

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 9abe03a0e4f978615a2b1b484b8d09ca84c16ea0< 108114437915e61e8f88d1cbcc442c3f886a347e affected
9abe03a0e4f978615a2b1b484b8d09ca84c16ea0< 84316cb25af95a60e655ccc8fe646bb5ad631b71 affected
9abe03a0e4f978615a2b1b484b8d09ca84c16ea0< aa301322f72f82f26e4ba0826018d41388ab9896 affected
6.14 affected
< 6.14 unaffected
6.18.53≤ 6.18.* unaffected
7.2.7≤ 7.2.* unaffected
7.3-rc3≤ * unaffected
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I. Basic Information for CVE-2026-97548

Vulnerability Information
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Vulnerability Title
xfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: xfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions The _maxlevels_ondisk functions are used to compute the size of in-memory btree cursors for each btree type. Unfortunately, LOLLM noticed that the rtrmap and rtrefcount versions of these functions forget to account for the inode root, which means that we could access beyond the end of the cursor given a sufficiently large btree. Fix this.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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 9abe03a0e4f978615a2b1b484b8d09ca84c16ea0 ~ 108114437915e61e8f88d1cbcc442c3f886a347e -
Linux Linux 6.14 -

II. Public POCs for CVE-2026-97548

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III. Intelligence Information for CVE-2026-97548

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Patches & Fixes for CVE-2026-97548 (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-2026-97957 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-2026-97555 8.8 HIGH smb: client: fix heap overflow in DACL owner/group rewrite
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-2026-97573 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-2026-98070 8.1 HIGH net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks()
CVE-2026-98069 8.1 HIGH net/rds: acquire the fastpath locks in rds_conn_shutdown()
CVE-2026-98130 8.1 HIGH sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START
CVE-2026-97578 7.8 HIGH media: verisilicon: rockchip: guard VPU981 AV1 divisor and tile buffer
CVE-2026-97903 7.8 HIGH exit: hold a reference to thread_pid across proc_flush_pid
CVE-2026-98052 7.8 HIGH net: bcmasp: clear txcb->last before writing each descriptor
CVE-2026-97611 7.8 HIGH net: openvswitch: fix use-after-free of the flow table mask array
CVE-2026-97612 7.8 HIGH net: mpls: clear inner_protocol when the last label is popped
CVE-2026-98073 7.8 HIGH net: Remove conflicting altnames for dying netns in __dev_change_net_namespace().
CVE-2026-97602 7.8 HIGH inet: frags: invalidate queues before flushing them
CVE-2026-98112 7.8 HIGH ksmbd: fix listener task lifetime on netdev events

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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