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NVD / CVE Program· CNA Linux

CVE-2026-74486: binfmt_misc: use exe_file_deny_write_access() for the interpreter clone

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 255a758697da87a205e072e0cfc35897b8f743b1, 2bd860b7e752a51185960143cab9fec7bf32c84e, 2fdf8b07bee5ef99ec77773a6be05fbb8ee5cdb9.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 255a758697da87a205e072e0cfc35897b8f743b1, 2bd860b7e752a51185960143cab9fec7bf32c84e, 2fdf8b07bee5ef99ec77773a6be05fbb8ee5cdb9 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: binfmt_misc: use exe_file_deny_write_access() for the interpreter clone For MISC_FMT_OPEN_FILE entries load_misc_binary() clones the registered interpreter file and denies write access to the clone via plain deny_write_access(). The clone is installed as bprm->interpreter and later released by the exec machinery through exe_file_allow_write_access() which skips the i_writecount increment for files with FMODE_FSNOTIFY_HSM set. The deny and allow side can therefore come to different conclusions when pre-content watches are in play: if a pre-content watch is added to the interpreter after registration every subsequent exec through that entry takes a write denial on the clone that is never paired with a write allowance, driving the interpreter inode's i_writecount further down with each exec and leaving the interpreter unwritable even after the entry and all its users are gone. Take the write denial via exe_file_deny_write_access() so both sides of the pairing base their decision on the same file mode, and propagate failure instead of silently ignoring it: an interpreter that is concurrently open for writing now fails the exec with ETXTBSY, exactly like an interpreter freshly opened via open_exec() would.

—No exploit Fix available
Published
Aug 15, 2026
Updated
Aug 23, 2026
EPSS
0.1% · 7th 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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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

    • 6.14affected
    • 5b432413f7bbbc8b935138490a57be05c1921684 and later · before c65eb018c12179b5e2c7afe1f0956298576fececaffected · git
    • bb4715098d8e340bbbdd3a874b31f89867c8067e and later · before 2bd860b7e752a51185960143cab9fec7bf32c84eaffected · git
    • c152be5adc0975c75cc4f50891c9072d52d60b47 and later · before eea4b7c7711b1e425272d23352af157f45f4c3e3affected · git
    • bf5ed2ef5cdb7b47ce606e3d48ea6eb803b31503 and later · before 2fdf8b07bee5ef99ec77773a6be05fbb8ee5cdb9affected · git
    • 483217fd6f7ccd98b3ed2531a54f75ed144b4499 and later · before f1e7ea3c8e070f19771cdaef55bbeda1359ad490affected · git
    • 0357ef03c94ef835bd44a0658b8edb672a9dbf51 and later · before 255a758697da87a205e072e0cfc35897b8f743b1affected · git
    • 0357ef03c94ef835bd44a0658b8edb672a9dbf51 and later · before f0edbaf487e4653a680a7abb91c1df94cb7886aaaffected · git
    • 0357ef03c94ef835bd44a0658b8edb672a9dbf51 and later · before fa5990ca8fd917003e526036bcc50413edb9722caffected · git
    • before 6.14not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:14linuxbefore 7.1.8-17.1.8-1

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-2026-74483Aug 15, 2026 · binfmt_misc: don't leak the user namespace when the mount fails
    0Monitor
  • ← EarlierCVE-2026-74484Aug 15, 2026 · binfmt_misc: don't let an 'F' entry pin its own instance
    0Monitor
  • Later →CVE-2026-74487Aug 15, 2026 · binfmt_misc: restore write access when removing an entry
    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 Linux255a758697da87a205e072e0cfc35897b8f743b1Vendor (CNA)
Linux Linux2bd860b7e752a51185960143cab9fec7bf32c84eVendor (CNA)
Linux Linux2fdf8b07bee5ef99ec77773a6be05fbb8ee5cdb9Vendor (CNA)
Linux Linuxc65eb018c12179b5e2c7afe1f0956298576fececVendor (CNA)
Linux Linuxeea4b7c7711b1e425272d23352af157f45f4c3e3Vendor (CNA)
Linux Linuxf0edbaf487e4653a680a7abb91c1df94cb7886aaVendor (CNA)
Linux Linuxf1e7ea3c8e070f19771cdaef55bbeda1359ad490Vendor (CNA)
Linux Linuxfa5990ca8fd917003e526036bcc50413edb9722cVendor (CNA)
debian:linux7.1.8-1 · Debian:14Package 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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.

Change log

  1. Fix✗ → ✓

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References

Show all references (7 more)

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

All records