TI-2026-45780 Aliases CVE-2026-64216 GHSA-wm9r-84gr-484q

netfs: Fix potential UAF in netfs_unlock_abandoned_read_pages()

MEDIUM 42CWE-416Published 2026-07-24 · Updated 2026-08-27

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix potential UAF in netfs_unlock_abandoned_read_pages() netfs_unlock_abandoned_read_pages(rreq) accesses the index of the folios it is wanting to unlock and compares that to rreq->no_unlock_folio so that it doesn't unlock a folio being read for netfs_perform_write() or netfs_write_begin(). However, given that netfs_unlock_abandoned_read_pages() is called _after_ NETFS_RREQ_IN_PROGRESS is cleared, the one folio that it's not allowed to dereference is the one specified by ->no_unlock_folio as ownership immediately reverts to the caller. Fix this by storing the folio pointer instead and using that rather than the index. Also fix netfs_unlock_read_folio() where the same applies.

Why it matters now

EPSS 0.00457 39th percentileScored 2026-11-07

Fix Partial Linux (Linux): 6.12.106, 6.18.34, 7.0.11 +1Red Hat: 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	6.12 and later	6.12.106, 6.18.34, 7.0.11, 7.1	Patch available	CNA

Linux VendorLinux Affected 6.12 and later Fixed in 6.12.106, 6.18.34, 7.0.11, 7.1 Patch available CNA

CPE configurations NVD · 5

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	6.12 to before 6.18.34; 6.19 to before 7.0.11	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc1::::::	7.1 rc1	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc2::::::	7.1 rc2	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc3::::::	7.1 rc3	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc4::::::	7.1 rc4	Vulnerable	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.12 to before 6.18.34; 6.19 to before 7.0.11 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* Versions 7.1 rc1 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* Versions 7.1 rc2 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* Versions 7.1 rc3 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* Versions 7.1 rc4 Vulnerable ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 6.12.106, 6.18.34, 7.0.11, 7.1

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet

Not affected: 4 products

Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2026-64216
2026-10-03 Alias added: GHSA-wm9r-84gr-484q
2026-10-13 EPSS moved to the below the 50th percentile
2026-10-13 Affected versions changed · Red Hat

References

Patch 3

Other 1

https://git.kernel.org/stable/c/d4ae8dba90b89e7bb4d1045d1cb26afbaf13ee5c

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TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3

See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences