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NVD / CVE Program· CNA Linux

CVE-2026-64468: binder: fix UAF in binder_free_transaction()

Noroxi assessment

Priority: Monitor (action score 31/100)

  • Public proof-of-concept code exists (GitHub); there is no record of 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 0be901ab1dcc4af59b88f2e324493bb283850167, 0f15f0f6ca5df566275ce517f257af2559528b41, 328ccf32acb87e8bbb1fe2b065068c574e4db2bf.

Low priority for now. Upgrade to Linux Linux 0be901ab1dcc4af59b88f2e324493bb283850167, 0f15f0f6ca5df566275ce517f257af2559528b41, 328ccf32acb87e8bbb1fe2b065068c574e4db2bf 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_free_transaction() In binder_free_transaction(), the t->to_proc is read under the t->lock. However, once the t->lock is dropped, the to_proc can die in parallel. This leads to a use-after-free error when we attempt to acquire its inner lock right afterwards: ================================================================== BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x1a0 Write of size 4 at addr ffff00001125da70 by task B/672 CPU: 20 UID: 0 PID: 672 Comm: B Not tainted 7.1.0-rc6-00284-g8e65320d91cd #4 PREEMPT Hardware name: linux,dummy-virt (DT) Call trace: _raw_spin_lock+0xe4/0x1a0 binder_free_transaction+0x8c/0x320 binder_send_failed_reply+0x21c/0x2f8 binder_thread_release+0x488/0x7e0 binder_ioctl+0x12c0/0x29a0 [...] Allocated by task 675: __kmalloc_cache_noprof+0x174/0x444 binder_open+0x118/0xb70 do_dentry_open+0x374/0x1040 vfs_open+0x58/0x3bc [...] Freed by task 212: __kasan_slab_free+0x58/0x80 kfree+0x1a0/0x4a4 binder_proc_dec_tmpref+0x32c/0x5e0 binder_deferred_func+0xc48/0x104c process_one_work+0x53c/0xbc0 [...] ================================================================== To prevent this, pin the target thread (t->to_thread) to guarantee the target process remains alive. Undelivered transactions without a target thread are already safe, as the target process can only be the current context in those paths.

HighCVSS 7.8 · v3.1—Proof of concept 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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-64468

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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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

    • a4a3c070b8760f71c8311399fa9bfe67c8629bca, 22068d49d09d2b3890e19d7b2048a33340f992da, 0e3b977a8f1be01dcfa0baae68851b1f55f2a0a9, 5.2affected
    • a370003cc301d4361bae20c9ef615f89bf8d1e8a and later · before 5602a43f251c3d75312df91a422675fc00ca3dceaffected · git
    • a370003cc301d4361bae20c9ef615f89bf8d1e8a and later · before 0be901ab1dcc4af59b88f2e324493bb283850167affected · git
    • a370003cc301d4361bae20c9ef615f89bf8d1e8a and later · before 48aeda9f8039e4a6971d1804578efde7f2c01edaaffected · git
    • a370003cc301d4361bae20c9ef615f89bf8d1e8a and later · before 45df558c543bb5543bacc8065fd7c567740781e5affected · git
    • a370003cc301d4361bae20c9ef615f89bf8d1e8a and later · before d45ef513eed1abebfec90c3cfb6ae50c2a4182dbaffected · git
    • a370003cc301d4361bae20c9ef615f89bf8d1e8a and later · before 328ccf32acb87e8bbb1fe2b065068c574e4db2bfaffected · git
    • a370003cc301d4361bae20c9ef615f89bf8d1e8a and later · before 0f15f0f6ca5df566275ce517f257af2559528b41affected · git
    • a370003cc301d4361bae20c9ef615f89bf8d1e8a and later · before f223d27a546c1e1f48d38fd67760e78f068fe8c4affected · git
    • 4.14.136 and later · before 4.15affected · 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-2026-64466Jul 25, 2026 · rust_binder: clear freeze listener on node removal
    0Monitor
  • ← EarlierCVE-2026-64467Jul 25, 2026 · rust_binder: use a u64 stride when cleaning up the offsets array
    35Monitor
  • Later →CVE-2026-64469Jul 25, 2026 · binder: fix UAF in binder_thread_release()
    31Monitor

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 Linux0be901ab1dcc4af59b88f2e324493bb283850167Vendor (CNA)
Linux Linux0f15f0f6ca5df566275ce517f257af2559528b41Vendor (CNA)
Linux Linux328ccf32acb87e8bbb1fe2b065068c574e4db2bfVendor (CNA)
Linux Linux4.15Vendor (CNA)
Linux Linux4.20Vendor (CNA)
Linux Linux45df558c543bb5543bacc8065fd7c567740781e5Vendor (CNA)
Linux Linux48aeda9f8039e4a6971d1804578efde7f2c01edaVendor (CNA)
Linux Linux5.2Vendor (CNA)
Linux Linux5602a43f251c3d75312df91a422675fc00ca3dceVendor (CNA)
Linux Linuxd45ef513eed1abebfec90c3cfb6ae50c2a4182dbVendor (CNA)
Linux Linuxf223d27a546c1e1f48d38fd67760e78f068fe8c4Vendor (CNA)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.100-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:292026-08-17

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.

  1. Published
  2. First PoC+23 d
  3. TodayOct 28, 2026+95 d
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