VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

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

Source GCVE Database

Authoritative record:CVE-2026-98777

Not known to be exploited · fixed in c4c02084d6687d5cd5edccaf52cc45e5160f1184 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in c4c02084d6687d5cd5edccaf52cc45e5160f1184, a7329ea53d04f0c6135d02905810cd6f42acdf45, 6673f4f21e2fddfed0abe1eb9045cc958e6db130 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-crhv-x2gr-r2gm

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 9864bb4801331daa48514face9d0f4861e4d485b, < c4c02084d6687d5cd5edccaf52cc45e5160f1184	Fixed in c4c02084d6687d5cd5edccaf52cc45e5160f1184
LinuxLinux	Affected ≥ 9864bb4801331daa48514face9d0f4861e4d485b, < a7329ea53d04f0c6135d02905810cd6f42acdf45	Fixed in a7329ea53d04f0c6135d02905810cd6f42acdf45
LinuxLinux	Affected ≥ 9864bb4801331daa48514face9d0f4861e4d485b, < 6673f4f21e2fddfed0abe1eb9045cc958e6db130	Fixed in 6673f4f21e2fddfed0abe1eb9045cc958e6db130
LinuxLinux	Affected ≥ 9864bb4801331daa48514face9d0f4861e4d485b, < 1299cb3fb061598496086fc87ff291057831148e	Fixed in 1299cb3fb061598496086fc87ff291057831148e
LinuxLinux	Affected ≥ 9864bb4801331daa48514face9d0f4861e4d485b, < 7fd609fb0e9dcbc4d7a1e4da1af5368c0555ff55	Fixed in 7fd609fb0e9dcbc4d7a1e4da1af5368c0555ff55
LinuxLinux	Affected =6.0	Fixed in–

AI-suggested

A fix for this vulnerability has been implemented in the Linux kernel by adding the missing call to binder_free_txn_fixups() before freeing outdated transactions in the TF_UPDATE_TXN supersede path. Users should apply the official kernel updates that include this fix.

Description

A vulnerability in the Linux kernel's binder driver caused leaked file descriptor fixups when a TF_UPDATE_TXN transaction supersedes a pending asynchronous transaction in a frozen process. This leak results from skipping a cleanup function, causing file references to remain pinned in memory indefinitely, potentially leading to resource exhaustion. The issue has been resolved by adding the missing cleanup call before freeing the outdated transaction.

References

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