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CVE-2026-99132— xfs: don't hold buffer locks across sync transaction commit in xfs_sync_sb_buf

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： XFS：在 xfs_sync_sb_buf 中，不要在同步事务提交期间持有缓冲区锁 函数在同步调用 期间持有了超级块（sb）和日志区（rtsb）的缓冲区锁。该提交操作内部会刷新 CIL（Checkpoint Image Log）推送工作队列。如果在 CIL 推送过程中系统发生关闭（shutdown）， 需要对这些缓冲区加锁以标记其失败，从而引发死锁： 路径：持有缓冲区锁 → 调用 CIL 推送工作线程：执行 → 尝试对同一缓冲区调用 修复方法是移除 调用，使事务提交能够

AI Predicted 5.5 Difficulty: Hard

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux f7664b31975bd893190708e76b2c424328f0c49b< e5456dec79c71c8ef8f9f9adb77d320f113b34db affected
f7664b31975bd893190708e76b2c424328f0c49b< 6353e5cd8c43d6e805cacbfbfecf4103571a7ff8 affected
f7664b31975bd893190708e76b2c424328f0c49b< 41a28c865d1d5843f8cb9e0af17a8f4d9e2961ff affected
4.18 affected
< 4.18 unaffected
6.18.59≤ 6.18.* unaffected
7.2.13≤ 7.2.* unaffected
7.3≤ * unaffected
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I. Basic Information for CVE-2026-99132

Vulnerability Information
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Vulnerability Title
xfs: don't hold buffer locks across sync transaction commit in xfs_sync_sb_buf
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: xfs: don't hold buffer locks across sync transaction commit in xfs_sync_sb_buf xfs_sync_sb_buf() holds sb/rtsb buffer locks across a synchronous xfs_trans_commit(), which flushes the CIL push workqueue internally. If shutdown occurs during the CIL push, xfs_buf_item_unpin() needs to lock these buffers to fail them, causing a deadlock: setlabel: holds buf lock -> flush_workqueue(xfs-cil) CIL push worker: xfs_buf_item_unpin -> xfs_buf_lock(same buf) Remove the xfs_trans_bhold() calls so that commit releases the buffer locks normally. After the sync commit, re-acquire the buffers via mp->m_sb_bp / mp->m_rtsb_bp for the on-disk writeback.
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 f7664b31975bd893190708e76b2c424328f0c49b ~ e5456dec79c71c8ef8f9f9adb77d320f113b34db -
Linux Linux 4.18 -

II. Public POCs for CVE-2026-99132

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III. Intelligence Information for CVE-2026-99132

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Patches & Fixes for CVE-2026-99132 (3)

Same Patch Batch · Linux · 2026-10-28 · 117 CVEs total

CVE-2026-99144 sched_ext: Fix use-after-free of a destroyed user DSQ by a deferred reenqueue
CVE-2026-99129 selinux: fix BPF token permission checks
CVE-2026-99130 io_uring/cancel: don't spin on local work the task can't run
CVE-2026-99131 xfs: fix capability check in xfs
CVE-2026-99133 net/iucv: fix the recvmsg window update
CVE-2026-99134 mac802154: fix data race and NULL deref on local->assoc_dev
CVE-2026-99135 dm-integrity: fix infinite loop on discard with large tag size
CVE-2026-99137 cifs: don't update i_size in cifs_do_truncate without a cached handle
CVE-2026-99136 dm-crypt: fix a tiny race condition in crypt_dec_pending
CVE-2026-99138 tcp: fix use-after-free in do_tcp_getsockopt(TCP_CC_INFO)
CVE-2026-99140 tracing: Fix hist trigger timestamps for buffered events
CVE-2026-99139 tcp: fix use-after-free in do_tcp_getsockopt(TCP_CONGESTION)
CVE-2026-99141 tracing: Fix crash in print_graph_function_event()
CVE-2026-99142 tracing: Check operator stack capacity before pushing
CVE-2026-99143 tracing: Keep the predicate limit separate from program capacity
CVE-2026-99156 scsi: st: Fix use-after-free race between st_remove() and st_open()
CVE-2026-99153 scsi: libiscsi: Validate the ITT reflected in a Reject PDU
CVE-2026-99152 scsi: libiscsi: Validate the task named by a management response
CVE-2026-99154 scsi: libiscsi: Reject a negative task index from parse_pdu_itt
CVE-2026-99151 drm/amd/display: Fix NULL sink dereference in USB4 bandwidth functions

Showing top 20 of 117 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux