VulnerabilityPublished 18 Oct 2026

CVE-2026-98804: Linux kernel · net: page_pool: fix use-after-free in page_pool_recycle_ring_bulk()

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in f78d45d5f1ac4141a03f033141368671da4293e4 : patch Linux kernel soon.

Data as of 26 Oct 2026, 14:05 UTC

Severity

High

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

EPSS: 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f78d45d5f1ac4141a03f033141368671da4293e4, bdea4980182e3badac74f04df6c07492b91c569e, 0b105f4eb78e5ee39e5a74c47c9efd69b6ac849c

Exploitation evidence

Disclosed: evidence found.
CVE published 18 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.

What to do

Upgrade Linux kernel to f78d45d5f1ac4141a03f033141368671da4293e4, bdea4980182e3badac74f04df6c07492b91c569e or 0b105f4eb78e5ee39e5a74c47c9efd69b6ac849c.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ fcc680a647ba77370480fe753664cc10d572b240, < f78d45d5f1ac4141a03f033141368671da4293e4	Fixed in f78d45d5f1ac4141a03f033141368671da4293e4
LinuxLinux	Affected ≥ fcc680a647ba77370480fe753664cc10d572b240, < bdea4980182e3badac74f04df6c07492b91c569e	Fixed in bdea4980182e3badac74f04df6c07492b91c569e
LinuxLinux	Affected ≥ fcc680a647ba77370480fe753664cc10d572b240, < 0b105f4eb78e5ee39e5a74c47c9efd69b6ac849c	Fixed in 0b105f4eb78e5ee39e5a74c47c9efd69b6ac849c
LinuxLinux	Affected =6.14	Fixed in–

AI-suggested

The vulnerability is fixed in specific Linux kernel commits identified by hashes f78d45d5f1ac4141a03f033141368671da4293e4, bdea4980182e3badac74f04df6c07492b91c569e, and 0b105f4eb78e5ee39e5a74c47c9efd69b6ac849c. Users should update to a Linux kernel version that includes these fixes. No other mitigation or temporary workaround is indicated.

Description

A use-after-free vulnerability was identified and fixed in the Linux kernel's page_pool_recycle_ring_bulk() function. The issue occurs when page_pool_recycle_ring_bulk() updates recycle statistics after releasing a lock, potentially allowing the pool to be freed prematurely during destruction. This flaw affects Linux kernel version 6.14 and has been addressed in subsequent commits.

Impact

This vulnerability could lead to use-after-free conditions in the Linux kernel's networking memory pool management, potentially causing kernel crashes or undefined behavior. There is no indication of known exploitation in the wild. The impact is limited to affected kernel versions with CONFIG_PAGE_POOL_STATS enabled.

Summary

The Linux kernel contained a use-after-free vulnerability in the page_pool_recycle_ring_bulk() function related to the handling of recycle statistics updates with CONFIG_PAGE_POOL_STATS enabled. The function updated recycle stats after dropping the producer lock, which could lead to the pool being freed before the stats update completed if it recycled the last inflight netmems of a pool being destroyed. This was introduced by a commit that moved the stat update after unlocking and was partially mitigated for a related function but not for page_pool_recycle_ring_bulk(). The fix moves the stat update back under the lock to prevent premature freeing.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 09:56 UTC

Technical details

References

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