VulnerabilityPublished 3 Nov 2026

CVE-2026-99247: Linux kernel · tracing: Do not initialize tracefs work if tracing is disabled

Source GCVE Database

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Authoritative record:CVE-2026-99247· High

Not known to be exploited · fixed in e8665e884e076d894f3eed8b9ea28e37a6448604 : patch Linux kernel soon.

Data as of 3 Nov 2026, 13:28 UTC

Severity

High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Patch: Available – fixed in e8665e884e076d894f3eed8b9ea28e37a6448604, e8cfcd7e60eaa3b0dea4d71c64499604e7081736, b3b974008388ab59e44d764ba7a63c988fec2524 +3

Exploitation evidence

Disclosed: evidence found.
CVE published 3 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-92rv-c2p9-qp48

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 6621a7004684bfcff5af4c8e4d37989941f42a6b, < e8665e884e076d894f3eed8b9ea28e37a6448604	Fixed in e8665e884e076d894f3eed8b9ea28e37a6448604
LinuxLinux	Affected ≥ 6621a7004684bfcff5af4c8e4d37989941f42a6b, < e8cfcd7e60eaa3b0dea4d71c64499604e7081736	Fixed in e8cfcd7e60eaa3b0dea4d71c64499604e7081736
LinuxLinux	Affected ≥ 6621a7004684bfcff5af4c8e4d37989941f42a6b, < b3b974008388ab59e44d764ba7a63c988fec2524	Fixed in b3b974008388ab59e44d764ba7a63c988fec2524
LinuxLinux	Affected ≥ 6621a7004684bfcff5af4c8e4d37989941f42a6b, < afd38b10b1c6a5c5d6952b15b990596dab9684e6	Fixed in afd38b10b1c6a5c5d6952b15b990596dab9684e6
LinuxLinux	Affected ≥ 6621a7004684bfcff5af4c8e4d37989941f42a6b, < 7539c61f522ff693d9565a0411386c2236e776cd	Fixed in 7539c61f522ff693d9565a0411386c2236e776cd
LinuxLinux	Affected ≥ 6621a7004684bfcff5af4c8e4d37989941f42a6b, < 813e18881c6472eb229a63180ff42c808e3e949b	Fixed in 813e18881c6472eb229a63180ff42c808e3e949b

AI-suggested

Apply the vendor's fix that adds a check for tracing_disabled at the beginning of tracer_init_tracefs_work_func to prevent initialization when tracing is disabled. This patch prevents the kernel crash by avoiding dereferencing an uninitialized events list.

Description

A Linux kernel vulnerability was fixed that prevented a NULL pointer dereference during early boot when tracing is disabled. The issue occurs because tracefs work is initialized without checking if tracing is disabled, leading to a crash due to dereferencing an uninitialized events list.

References

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