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CVE-2026-68146— ftrace: Add global mutex to serialize trace_parser access

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.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于ftrace的trace_parser访问未进行互斥保护，多线程并发写入时导致解析器内部状态竞争，可能造成输入损坏或未定义行为。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1055 · Process Injection

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 689fd8b65d669b96d612ccc37d6fb87bf7ed6907< a29bc20ea5f0cb79c6287f2c6182c5eeb8e6c01f affected
689fd8b65d669b96d612ccc37d6fb87bf7ed6907< db76744d588086695371ecdd982694395628ba48 affected
689fd8b65d669b96d612ccc37d6fb87bf7ed6907< 1474fe4453505b6be720b5bb94be1c927de3314a affected
689fd8b65d669b96d612ccc37d6fb87bf7ed6907< 3d0dd138a06c782f8b755cd1b6f9909494514ce1 affected
689fd8b65d669b96d612ccc37d6fb87bf7ed6907< 90be137813e1a5bdfd671e40fe28004fb959d3e4 affected
689fd8b65d669b96d612ccc37d6fb87bf7ed6907< 65bf73bee1a4f3722208ae46afc0fa5de76b9a0a affected
689fd8b65d669b96d612ccc37d6fb87bf7ed6907< e807c9193d9493c7a0d039158ebb955050a76df1 affected
689fd8b65d669b96d612ccc37d6fb87bf7ed6907< 7720b63bcef3f54c7fe288774b720a227d54a306 affected
… +10 more rows
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I. Basic Information for CVE-2026-68146

Vulnerability Information
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Vulnerability Title
ftrace: Add global mutex to serialize trace_parser access
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ftrace: Add global mutex to serialize trace_parser access In ftrace, the trace_parser structure is allocated and initialized when a trace file is opened, and is subsequently used across write and release handlers to parse user input. The affected handler paths and their specific functions are: - Open paths: ftrace_regex_open(), ftrace_graph_open() - Write paths: ftrace_regex_write(), ftrace_graph_write() - Release paths: ftrace_regex_release(), ftrace_graph_release() If userspace opens a trace file descriptor and shares it across multiple threads, concurrent write calls will race on the parser's internal state, specifically the 'idx', 'cont', and 'buffer' fields, leading to corrupted input or undefined behavior. Fix this by adding a global mutex, parser_lock, to serialize all access to trace_parser across write and release paths, preventing concurrent corruption of parser state.
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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于ftrace的trace_parser访问未进行互斥保护，多线程并发写入时导致解析器内部状态竞争，可能造成输入损坏或未定义行为。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 689fd8b65d669b96d612ccc37d6fb87bf7ed6907 ~ a29bc20ea5f0cb79c6287f2c6182c5eeb8e6c01f -
Linux Linux 2.6.32 -

II. Public POCs for CVE-2026-68146

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III. Intelligence Information for CVE-2026-68146

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Patches & Fixes for CVE-2026-68146 (8)

Same Patch Batch · Linux · 2026-08-10 · 344 CVEs total

CVE-2026-68159 9.8 CRITICAL libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
CVE-2026-68381 9.8 CRITICAL ksmbd: pin conn during async oplock break notification
CVE-2026-68385 9.8 CRITICAL s390/checksum: Fix csum_partial() without vector facility
CVE-2026-68388 9.8 CRITICAL smb/client: handle overlapping allocated ranges in fallocate
CVE-2026-68117 9.8 CRITICAL tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-68170 9.8 CRITICAL mptcp: fix stale skb->sk reference on subflow close
CVE-2026-68161 9.8 CRITICAL sctp: close UDP tunnel sockets during netns teardown
CVE-2026-68123 9.8 CRITICAL openvswitch: fix GSO userspace truncation underflow
CVE-2026-68160 9.8 CRITICAL ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-68127 9.8 CRITICAL ila: reload IPv6 header after pskb_may_pull in checksum adjust
CVE-2026-68144 9.8 CRITICAL phonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-68137 9.8 CRITICAL net/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-68302 9.8 CRITICAL amt: re-read skb header pointers after every pull
CVE-2026-68300 9.8 CRITICAL sctp: auth: verify auth requirement when auth_chunk is NULL
CVE-2026-68426 9.8 CRITICAL xfrm: fix stale skb->prev after async crypto steals a GSO segment
CVE-2026-68136 9.8 CRITICAL net: gro: fix double aggregation of flush-marked skbs
CVE-2026-68154 9.8 CRITICAL libceph: reject zero bucket types in crush_decode
CVE-2026-68158 9.8 CRITICAL libceph: Fix multiplication overflow in decode_new_up_state_weight()
CVE-2026-68156 9.8 CRITICAL libceph: refresh auth->authorizer_buf{,_len} after authorizer update
CVE-2026-68124 9.6 CRITICAL mctp: serial: handle zero-length frames to prevent rx buffer overflow

Showing top 20 of 344 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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