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CVE-2026-99142— tracing: Check operator stack capacity before pushing

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：追踪（tracing）：在入栈前检查运算符栈的容量函数在处理任何左括号之前，会先使用运算符栈的第一个条目。随后的入栈操作会在写入前先递增栈顶指针。现有的检查机制允许在已指向最后一个已分配条目时仍执行写入，从而导致访问超出运算符栈的范围。修复方案：当达到最后一个已分配条目时，拒绝执行入栈操作。

AI Predicted 8.8 Difficulty: Hard Updated Oct 28, 2026

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 8

Vendor	Product	Version Range	Status
Linux	Linux	`39f7c41c908bc82947ce47cdd021520ff486c53f< a866a8a753922cdf7710b8eb3f686dc0efc06505`	affected
		`39f7c41c908bc82947ce47cdd021520ff486c53f< 75e894f92417390f0ef44fd350f2d3634c784876`	affected
		`39f7c41c908bc82947ce47cdd021520ff486c53f< c47a7b11bcb3d45e29723afcf6336866476b1d08`	affected
		`6.6`	affected
		`< 6.6`	unaffected
		`6.18.59≤ 6.18.*`	unaffected
		`7.2.13≤ 7.2.*`	unaffected
		`7.3≤ *`	unaffected

Updated Oct 28, 2026

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Vulnerability Information

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Vulnerability Title

tracing: Check operator stack capacity before pushing

Source: CVE Program / CVE List V5

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: tracing: Check operator stack capacity before pushing predicate_parse() uses the first operator stack entry before processing any opening parentheses. A push then increments top before writing. The existing check still permits that write when top already points to the last allocated entry, which can access beyond the operator stack. Reject the push when top reaches the last allocated entry.

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	39f7c41c908bc82947ce47cdd021520ff486c53f ~ a866a8a753922cdf7710b8eb3f686dc0efc06505	-
Linux	Linux	6.6	-

II. Public POCs for CVE-2026-99142

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-99142

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Patches & Fixes for CVE-2026-99142 (3)

https://www.cve.org/CVERecord?id=CVE-2026-99142

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-2026-99132		xfs: don't hold buffer locks across sync transaction commit in xfs_sync_sb_buf
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-2026-99143		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 → →

IV. Related Vulnerabilities

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