VulnerabilityPublished 16 Sep 2026Updated 30 Oct 2026

CVE-2026-89962: Linux kernel · powerpc/kexec_file: Prevent kexec range truncation

Source GCVE Database

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Authoritative record:CVE-2026-89962· High

Not known to be exploited · fixed in ffbdc2a3834a3e47bac7236a71bbc82b45c83832 : patch Linux kernel soon.

Data as of 30 Oct 2026, 19:20 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 ffbdc2a3834a3e47bac7236a71bbc82b45c83832, fa40f9dbdd4af53e7445d9135b5b207eb8adf372, da88a2a2119e4fd0e8919a7a2448682f574e1545 +3

Exploitation evidence

Disclosed: evidence found.
CVE published 16 Sep 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 30 Oct 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-52p7-4c9h-jcc7

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 180adfc532a83c1d74146449f7385f767d4b8059, < ffbdc2a3834a3e47bac7236a71bbc82b45c83832	Fixed in ffbdc2a3834a3e47bac7236a71bbc82b45c83832
LinuxLinux	Affected ≥ 180adfc532a83c1d74146449f7385f767d4b8059, < fa40f9dbdd4af53e7445d9135b5b207eb8adf372	Fixed in fa40f9dbdd4af53e7445d9135b5b207eb8adf372
LinuxLinux	Affected ≥ 180adfc532a83c1d74146449f7385f767d4b8059, < da88a2a2119e4fd0e8919a7a2448682f574e1545	Fixed in da88a2a2119e4fd0e8919a7a2448682f574e1545
LinuxLinux	Affected ≥ 180adfc532a83c1d74146449f7385f767d4b8059, < c4cb547f26d9b73b489c5278d0c8db837c5a174f	Fixed in c4cb547f26d9b73b489c5278d0c8db837c5a174f
LinuxLinux	Affected ≥ 180adfc532a83c1d74146449f7385f767d4b8059, < 9ef63622e6cee588ea4b763a6afc87065254b36a	Fixed in 9ef63622e6cee588ea4b763a6afc87065254b36a
LinuxLinux	Affected ≥ 180adfc532a83c1d74146449f7385f767d4b8059, < 1b9f9d566a5826da373dce7fe8958a4f23e86019	Fixed in 1b9f9d566a5826da373dce7fe8958a4f23e86019

AI-suggested

A fix has been implemented to correct the memory range merging logic in the Linux kernel. Users should apply the official kernel update that includes this fix once available.

Description

A vulnerability in the Linux kernel's powerpc/kexec_file component causes incorrect merging of overlapping memory ranges. This flaw leads to truncation of valid memory ranges in the kexec exclude lists, potentially allowing the crash kernel to overwrite active memory and cause data corruption or system crashes. The issue arises from improper comparison and update logic in the __merge_memory_ranges() function. A fix has been implemented to correct the range merging logic.

References

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