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CVE-2026-90201· NVD / CVE Program· CNA Linux

net: page_pool: fix UAF in __page_pool_release_netmem_dma on xa_cmpxchg race

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.20% (FIRST EPSS).
  • Fixed version: Linux Linux 24ef02f934eeb48830cff6b739abc3c62b1d107b, 424a9fc4876cc7f28e9cb0aa8d92e920d726e350, 6.12.110.

Low priority for now. Upgrade to Linux Linux 24ef02f934eeb48830cff6b739abc3c62b1d107b, 424a9fc4876cc7f28e9cb0aa8d92e920d726e350, 6.12.110 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: net: page_pool: fix UAF in __page_pool_release_netmem_dma on xa_cmpxchg race This bug was discovered while testing the hns3 driver under channel reconfiguration (`ethtool -L` / `ethtool -G`) with iperf3 traffic on arm64. The race is intermittently triggered when page_pool_destroy() runs page_pool_scrub() concurrently with page return via page_pool_put_netmem() on a different CPU. A WARN in page_pool_clear_pp_info() surfaced the dangling DMA index bits left by the cmpxchg loser, which led to the investigation. page_pool_scrub() iterates pool->dma_mapped via xa_for_each() with no page ref held. __page_pool_release_netmem_dma() currently reads and writes netmem fields (dma_addr, DMA index bits in pp_magic) after xa_cmpxchg() returns. The unref path calls put_page() unconditionally regardless of the cmpxchg outcome; when it loses the cmpxchg, it still frees the page before the scrub winner finishes these netmem accesses, so scrub touches a freed page -- a Use-After-Free. Fix this by splitting the DMA release into two functions: 1. __page_pool_unmap_netmem_dma() caches dma_addr before xa_cmpxchg(), does the cmpxchg to remove the DMA mapping, and calls dma_unmap on the cached address. It never touches netmem fields after the cmpxchg, making it safe for the scrub path which holds no page ref. 2. __page_pool_release_netmem_dma() wraps the above and additionally clears dma_addr and DMA index bits in netmem fields. This is safe only when the caller holds a page ref, so it is used by the return path (page_pool_return_netmem). The scrub path calls __page_pool_unmap_netmem_dma() directly; the return path calls __page_pool_release_netmem_dma().

—No exploit Fix available
Published
Sep 17, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 9th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • c30ae60f41f9edd6e1b5cad41cf28ce04dae39e4, 6.16affected
    • 4f51fb0d257ff4d406ec27966902de075e3b118e and later · before bbfef303f980c1c078b8fa142e10a0e2fbcdd247affected · git
    • ee62ce7a1d909ccba0399680a03c2dee83bcae95 and later · before 424a9fc4876cc7f28e9cb0aa8d92e920d726e350affected · git
    • ee62ce7a1d909ccba0399680a03c2dee83bcae95 and later · before 9b65b0253ad5a66f73efee9a79a21a1e2b57cf59affected · git
    • ee62ce7a1d909ccba0399680a03c2dee83bcae95 and later · before 24ef02f934eeb48830cff6b739abc3c62b1d107baffected · git
    • 6.12.34 and later · before 6.12.110affected · semver
    • 6.15.3 and later · before 6.16affected · semver
    • before 6.16not affected · semver
    • 6.12.110 and later · up to and including 6.12.*not affected · semver
    • 6.18.52 and later · up to and including 6.18.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

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Published before and after this one in the same product

  • ← EarlierCVE-2026-90199Sep 17, 2026 · fs/ntfs3: reject out-of-range evcn in mi_enum_attr()
    31Monitor
  • ← EarlierCVE-2026-90200Sep 17, 2026 · fs/ntfs3: fix integer overflow in MFT cluster validation
    0Monitor
  • Later →CVE-2026-90202Sep 17, 2026 · scsi: mpt3sas: Avoid freeing unallocated PCIe SGL buffers
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux24ef02f934eeb48830cff6b739abc3c62b1d107bVendor (CNA)
Linux Linux424a9fc4876cc7f28e9cb0aa8d92e920d726e350Vendor (CNA)
Linux Linux6.12.110Vendor (CNA)
Linux Linux6.16Vendor (CNA)
Linux Linux9b65b0253ad5a66f73efee9a79a21a1e2b57cf59Vendor (CNA)
Linux Linuxbbfef303f980c1c078b8fa142e10a0e2fbcdd247Vendor (CNA)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

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No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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