# CVE-2026-89498

## Summary

- **CVE ID:** CVE-2026-89498
- **Severity:** UNKNOWN
- **CVSS Score:** 0
- **CWE:** N/A
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 16, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:

orangefs: fix double-free of trailer_buf on readdir copy failure

On a readdir downcall, orangefs_devreq_write_iter() frees
op->downcall.trailer_buf with vfree() when copy_from_iter_full() fails,
but does not clear the pointer before goto Efault. The waiter in
do_readdir() is then woken with a negative status and frees the same
pointer again on its r < 0 path, causing a deterministic double-free.
A client holding /dev/pvfs2-req triggers it by sending a readdir
downcall whose declared trailer_size exceeds the bytes it supplies.

Clear the pointer after freeing so the readdir-side vfree() becomes a
no-op.

## Affected Products

- Linux — Linux (382f4581e67f57209c7aa67e39f26ba076306a2e)
- Linux — Linux (4.12)
- Linux — Linux (0)
- Linux — Linux (6.12.109)
- Linux — Linux (6.18.50)
- Linux — Linux (7.2.4)
- Linux — Linux (7.3-rc1)
- Linux — Linux (5.10.270)
- Linux — Linux (5.15.221)
- Linux — Linux (6.1.188)
- Linux — Linux (6.6.157)

## References

- [CNA](https://git.kernel.org/stable/c/2f5454a25127854c232fde5d1d65d16fbcd42d43)
- [CNA](https://git.kernel.org/stable/c/f796f38a324e89547738f4b70cc33be5be2bc6da)
- [CNA](https://git.kernel.org/stable/c/519f4146b8b8c5f20c2ad01913acd6df2df8fc8e)
- [CNA](https://git.kernel.org/stable/c/f574296be7f46eb60beca851240b526df232f480)
- [CNA](https://git.kernel.org/stable/c/712c4235fcc73c11a2f1d59a499d489e49c374a4)
- [CNA](https://git.kernel.org/stable/c/433c2e470053cc9c712314d3d8c3dfbc862d68eb)
- [CNA](https://git.kernel.org/stable/c/6e5924644ef4bce06a3cbb7cb841a8bbfdfc03ad)
- [CNA](https://git.kernel.org/stable/c/9c9eacc47c618ed6d7d35fe75a40d294c8cdbffa)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.18%
- **EPSS Percentile:** 7.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._