VulnerabilityPublished 23 Oct 2026

CVE-2026-98918: Linux kernel · mm/damon/ops-common: use a page-aligned address in damon_ptep_mkold()

Source GCVE Database

Authoritative record:CVE-2026-98918

Not known to be exploited : upgrade to f166586f74dd5d9cbadaabf86ef81c8ddf6cafa7 or d5208de0799c506d3315b6f96d034c38e4509dbb soon.

Data as of 26 Oct 2026, 14:05 UTC

Severity

High

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f166586f74dd5d9cbadaabf86ef81c8ddf6cafa7, d5208de0799c506d3315b6f96d034c38e4509dbb

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, 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-2q7x-49g7-vwpm

What to do

Upgrade Linux kernel to f166586f74dd5d9cbadaabf86ef81c8ddf6cafa7 or d5208de0799c506d3315b6f96d034c38e4509dbb.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 6f0e1142173a54b8a18c59fc3cbae3b31ee423d9, < f166586f74dd5d9cbadaabf86ef81c8ddf6cafa7	Fixed in f166586f74dd5d9cbadaabf86ef81c8ddf6cafa7
LinuxLinux	Affected ≥ 6f0e1142173a54b8a18c59fc3cbae3b31ee423d9, < d5208de0799c506d3315b6f96d034c38e4509dbb	Fixed in d5208de0799c506d3315b6f96d034c38e4509dbb
LinuxLinux	Affected =7.0	Fixed in–

AI-suggested

A fix is available that ensures the address passed to ptep_test_and_clear_young() is page-aligned, preventing out-of-bounds writes. Users should update to a Linux kernel version that includes this fix. No other mitigation is required as the vulnerability is resolved by this patch.

Description

A vulnerability in the Linux kernel's DAMON subsystem was resolved involving the use of an unaligned address in damon_ptep_mkold(). This caused an out-of-bounds write during page table walks on arm64 architectures, potentially corrupting adjacent memory or causing kernel crashes. The issue was triggered by the kernel selftest suite and could lead to kernel faults or silent memory corruption depending on the memory page permissions. The fix ensures a page-aligned address is used in the affected function, preventing the out-of-bounds access.

Impact

The vulnerability can cause kernel crashes or silent memory corruption on affected arm64 Linux kernels during DAMON sampling operations. Crashes occur if the out-of-bounds write hits read-only memory, while silent corruption may affect other kernel data structures if the adjacent page is writable. This undermines kernel stability and could potentially lead to privilege escalation or denial of service, though no specific exploit in the wild is known.

References

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