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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98777: binder: fix leaked fd fixups on TF_UPDATE_TXN supersede

—No exploit Fix available

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: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 1299cb3fb061598496086fc87ff291057831148e, 6673f4f21e2fddfed0abe1eb9045cc958e6db130, 7fd609fb0e9dcbc4d7a1e4da1af5368c0555ff55; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 1299cb3fb061598496086fc87ff291057831148e, 6673f4f21e2fddfed0abe1eb9045cc958e6db130, 7fd609fb0e9dcbc4d7a1e4da1af5368c0555ff55; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes 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 leaked fd fixups on TF_UPDATE_TXN supersede When a TF_UPDATE_TXN transaction supersedes a pending async transaction in a frozen process, the outdated transaction is freed with kfree() directly. This skips binder_free_txn_fixups(), leaking all binder_txn_fd_fixup entries and their fget()'d struct file references. The leaked file refcounts never reach zero, so the struct file objects are permanently pinned in memory. They survive process exit and accumulate across invocations until file-max exhaustion. Every other transaction cleanup path (binder_free_transaction(), binder_transaction() error paths, binder_release_work()) correctly calls binder_free_txn_fixups(). Add the missing call before kfree() in the t_outdated cleanup block.

Published
Oct 18, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 6th 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 · 0.1%

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  • A fix has been released

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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

    • 6.0affected
    • 9864bb4801331daa48514face9d0f4861e4d485b and later · before ab3f0ea529d4e36dde52c8efc76082c501abf9b6affected · git
    • 9864bb4801331daa48514face9d0f4861e4d485b and later · before a7329ea53d04f0c6135d02905810cd6f42acdf45affected · git
    • 9864bb4801331daa48514face9d0f4861e4d485b and later · before 7fd609fb0e9dcbc4d7a1e4da1af5368c0555ff55affected · git
    • 9864bb4801331daa48514face9d0f4861e4d485b and later · before 1299cb3fb061598496086fc87ff291057831148eaffected · git
    • 9864bb4801331daa48514face9d0f4861e4d485b and later · before 6673f4f21e2fddfed0abe1eb9045cc958e6db130affected · git
    • 9864bb4801331daa48514face9d0f4861e4d485b and later · before c4c02084d6687d5cd5edccaf52cc45e5160f1184affected · git
    • before 6.0not affected · semver
    • 6.1.191 and later · up to and including 6.1.*not affected · semver
    • 6.6.160 and later · up to and including 6.6.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.10-17.2.10-1

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-2026-98775Oct 18, 2026 · nitro_enclaves: fix use-after-free on SLOT_ALLOC failure
    0Monitor
  • ← EarlierCVE-2026-98776Oct 18, 2026 · binderfs: fix UAF write in binder_add_device
    0Monitor
  • Later →CVE-2026-98778Oct 18, 2026 · binder: fix is_failure flag for superseded transaction cleanup
    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 Linux1299cb3fb061598496086fc87ff291057831148eVendor (CNA)
Linux Linux6673f4f21e2fddfed0abe1eb9045cc958e6db130Vendor (CNA)
Linux Linux7fd609fb0e9dcbc4d7a1e4da1af5368c0555ff55Vendor (CNA)
Linux Linuxa7329ea53d04f0c6135d02905810cd6f42acdf45Vendor (CNA)
Linux Linuxab3f0ea529d4e36dde52c8efc76082c501abf9b6Vendor (CNA)
Linux Linuxc4c02084d6687d5cd5edccaf52cc45e5160f1184Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.113-1~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.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 13, 2026+26 d
EPSS, last 120 days

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

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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.

References

Show all references (5 more)

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

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