orangefs: keep the readdir entry size 64-bit in fill_from_part()
In the Linux kernel, the following vulnerability has been resolved: orangefs: keep the readdir entry size 64-bit in fill_from_part() fill_from_part() computes the size of a directory entry in size_t but stores it in a __u32. An entry length near U32_MAX wraps it to a small value, bypasses the bounds check, and is then used to index the entry, reading far past the directory part -- an out-of-bounds read that oopses the kernel. Compute the size as a u64 so it cannot truncate; the bounds check then rejects the entry. The trailer is supplied by the userspace client.
- Published
- Aug 15, 2026
- Updated
- Aug 17, 2026
- EPSS
- 0.8% · 55th percentile
- CWE
- —
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Report tools
Action score
39
Monitor
Low priority for now.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.8%
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 9.8
- 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.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
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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
- 4.12affected
- 480e3e532e31666a18520a7964bb4095d7a16b9a and later · before 1679780f482feeb82acb5995587d4fb1d1fe82fdaffected · git
- 480e3e532e31666a18520a7964bb4095d7a16b9a and later · before a72bbb43689591c9d36e3bb45c2d4e688cf92682affected · git
- 480e3e532e31666a18520a7964bb4095d7a16b9a and later · before 36723b28e3293047f087f4501f1ef4ead418dd84affected · git
- 480e3e532e31666a18520a7964bb4095d7a16b9a and later · before 07c05601a9a8e5d4481b2a4a16dc0e3c5bc63ad9affected · git
- 480e3e532e31666a18520a7964bb4095d7a16b9a and later · before fdf06a1b66ff39664b01c6bb6a2aa98d81e8ebe1affected · git
- 480e3e532e31666a18520a7964bb4095d7a16b9a and later · before 82fc886e244c76fadf05ef1958aaf8815478ccdeaffected · git
- 480e3e532e31666a18520a7964bb4095d7a16b9a and later · before e3d325c0bdb7bc5d1b4cc8d8441d79794cd03729affected · git
- 480e3e532e31666a18520a7964bb4095d7a16b9a and later · before 18227a6bc98bd0ba96ed3ce9d5b28776a5a28dfcaffected · git
- before 4.12not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.180-1 | 6.1.180-1 |
| Debian:13 | linux | before 6.12.100-1 | 6.12.100-1 |
| Debian:14 | linux | before 7.1.5-1 | 7.1.5-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation40Plan
- CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment40Plan
- CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()40Plan
- CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler40Plan
- CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index40Plan
- CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index40Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 07c05601a9a8e5d4481b2a4a16dc0e3c5bc63ad9 | Vendor (CNA) |
| Linux Linux | 1679780f482feeb82acb5995587d4fb1d1fe82fd | Vendor (CNA) |
| Linux Linux | 18227a6bc98bd0ba96ed3ce9d5b28776a5a28dfc | Vendor (CNA) |
| Linux Linux | 36723b28e3293047f087f4501f1ef4ead418dd84 | Vendor (CNA) |
| Linux Linux | 82fc886e244c76fadf05ef1958aaf8815478ccde | Vendor (CNA) |
| Linux Linux | a72bbb43689591c9d36e3bb45c2d4e688cf92682 | Vendor (CNA) |
| Linux Linux | e3d325c0bdb7bc5d1b4cc8d8441d79794cd03729 | Vendor (CNA) |
| Linux Linux | fdf06a1b66ff39664b01c6bb6a2aa98d81e8ebe1 | Vendor (CNA) |
| debian:linux | 6.1.180-1 · Debian:12 | Package 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.
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 researchersFinders, 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
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- 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
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/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
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/07c05601a9a8e5d4481b2a4a16dc0e3c5bc63ad9
- git.kernel.org/stable/c/1679780f482feeb82acb5995587d4fb1d1fe82fd
- git.kernel.org/stable/c/18227a6bc98bd0ba96ed3ce9d5b28776a5a28dfc
- git.kernel.org/stable/c/36723b28e3293047f087f4501f1ef4ead418dd84
- git.kernel.org/stable/c/82fc886e244c76fadf05ef1958aaf8815478ccde
- git.kernel.org/stable/c/a72bbb43689591c9d36e3bb45c2d4e688cf92682
- git.kernel.org/stable/c/e3d325c0bdb7bc5d1b4cc8d8441d79794cd03729
- git.kernel.org/stable/c/fdf06a1b66ff39664b01c6bb6a2aa98d81e8ebe1
Vendor advisories and official records. Exploit/PoC links are deliberately left out.