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NVD / CVE Program· CNA Linux

CVE-2026-64469: binder: fix UAF in binder_thread_release()

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.13% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 114a116aaa5f0295376cdf12da743c5bce3b20ce, 1f96f8c0a6ed4f6d01d3dd29ad0cbf08dde96082, 38e1a71728e5795b670cc159c18e286a40aeebb4.

Low priority for now. Upgrade to Linux Linux 114a116aaa5f0295376cdf12da743c5bce3b20ce, 1f96f8c0a6ed4f6d01d3dd29ad0cbf08dde96082, 38e1a71728e5795b670cc159c18e286a40aeebb4 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: binder: fix UAF in binder_thread_release() When a thread exits, binder_thread_release() walks its transaction stack to clear the t->from and t->to_proc that correspond with the exiting thread. However, a process dying in parallel might attempt to kfree some of these transactions. And if one of them has no associated t->to_proc, the t->to_proc->inner_lock will not be acquired. This means that transaction accesses in binder_thread_release() after t->to_proc has been cleared might race with binder_free_transaction() and cause a use-after-free error as reported by KASAN: ================================================================== BUG: KASAN: slab-use-after-free in binder_thread_release+0x5d0/0x798 Write of size 8 at addr ffff000016627500 by task X/715 CPU: 17 UID: 0 PID: 715 Comm: X Not tainted 7.1.0-rc5-00149-g8fde5d1d47f6 #30 PREEMPT Hardware name: linux,dummy-virt (DT) Call trace: binder_thread_release+0x5d0/0x798 binder_ioctl+0x12c0/0x299c [...] Allocated by task 717 on cpu 18 at 67.267803s: __kasan_kmalloc+0xa0/0xbc __kmalloc_cache_noprof+0x174/0x444 binder_transaction+0x554/0x8150 binder_thread_write+0xa30/0x4354 binder_ioctl+0x20f0/0x299c [...] Freed by task 202 on cpu 18 at 90.416221s: __kasan_slab_free+0x58/0x80 kfree+0x1a0/0x4a4 binder_free_transaction+0x150/0x294 binder_send_failed_reply+0x398/0x6d8 binder_release_work+0x3e4/0x4ec binder_deferred_func+0xbd8/0x104c [...] ================================================================== In order to avoid this, make sure that binder_free_transaction() reads the t->to_proc under the transaction lock. This will serialize the transaction release with the accesses in binder_thread_release(). Plus, it matches the documented locking rules for @to_proc.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Jul 25, 2026
Updated
Aug 17, 2026
EPSS
0.1% · 2th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • A fix has been released

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When you'll hear from us

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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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

    • 4.14affected
    • 7a4408c6bd3eb1dafba67986259191be081e3efb and later · before 1f96f8c0a6ed4f6d01d3dd29ad0cbf08dde96082affected · git
    • 7a4408c6bd3eb1dafba67986259191be081e3efb and later · before df1a17abba8d6fac5f965adcb8113ceace6e4949affected · git
    • 7a4408c6bd3eb1dafba67986259191be081e3efb and later · before 38e1a71728e5795b670cc159c18e286a40aeebb4affected · git
    • 7a4408c6bd3eb1dafba67986259191be081e3efb and later · before faa070c7ad8ba25dcd0b12d7cdbb419e336f5391affected · git
    • 7a4408c6bd3eb1dafba67986259191be081e3efb and later · before e63032dc715026a96bcaa13d375a8e15c91caa84affected · git
    • 7a4408c6bd3eb1dafba67986259191be081e3efb and later · before ea02df466df60ecd758eb3b4df3f0cadc5c886ceaffected · git
    • 7a4408c6bd3eb1dafba67986259191be081e3efb and later · before ef5439ba5b9ac93349f5df12ef88b42a0ce26340affected · git
    • 7a4408c6bd3eb1dafba67986259191be081e3efb and later · before 114a116aaa5f0295376cdf12da743c5bce3b20ceaffected · git
    • before 4.14not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:12linux-6.12before 6.12.100-1~deb12u16.12.100-1~deb12u1
Debian:13linuxbefore 6.12.96-16.12.96-1
Debian:14linuxbefore 7.1.4-17.1.4-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-64467Jul 25, 2026 · rust_binder: use a u64 stride when cleaning up the offsets array
    35Monitor
  • ← EarlierCVE-2026-64468Jul 25, 2026 · binder: fix UAF in binder_free_transaction()
    31Monitor
  • Later →CVE-2026-64470Jul 25, 2026 · Bluetooth: btusb: fix use-after-free on marvell probe failure
    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 Linux114a116aaa5f0295376cdf12da743c5bce3b20ceVendor (CNA)
Linux Linux1f96f8c0a6ed4f6d01d3dd29ad0cbf08dde96082Vendor (CNA)
Linux Linux38e1a71728e5795b670cc159c18e286a40aeebb4Vendor (CNA)
Linux Linuxdf1a17abba8d6fac5f965adcb8113ceace6e4949Vendor (CNA)
Linux Linuxe63032dc715026a96bcaa13d375a8e15c91caa84Vendor (CNA)
Linux Linuxea02df466df60ecd758eb3b4df3f0cadc5c886ceVendor (CNA)
Linux Linuxef5439ba5b9ac93349f5df12ef88b42a0ce26340Vendor (CNA)
Linux Linuxfaa070c7ad8ba25dcd0b12d7cdbb419e336f5391Vendor (CNA)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.100-1~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

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

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.

—

Bug bounty scope

No known public program.

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

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

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✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

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

All records