CVE-2026-89680
Published: September 15, 2026Last modified: September 28, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: nfsd: fix nfsd_file leak on inter-server COPY setup failure When nfsd4_setup_inter_ssc() fails, nfsd4_copy() returns nfserr_offload_denied directly, bypassing the out: label where release_copy_files() would drop the nf_dst reference taken by nfs4_preprocess_stateid_op(). Each failed inter-server COPY leaks one nfsd_file, pinning file/inode/dentry/vfsmount. Fix by setting status and jumping to out: instead of returning directly.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Vulnerable (6.1.182-r0) |
| 25 LTS | linux-lts | Fixed (6.12.111-r0) | |
| Stream | linux-lts | Fixed (6.18.53-r0) |
References
- https://git.kernel.org/stable/c/1a6a41b848455bf6ba2c9da2dfb0730e608ce7ab
- https://git.kernel.org/stable/c/424d5c95108a4809b832cb0a312c61de4aec0078
- https://git.kernel.org/stable/c/6ed8d6de7ec90c4ba84eb82673058f506e5777fd
- https://git.kernel.org/stable/c/88a76145451d703eedd867b5989bf73d17340399
- https://git.kernel.org/stable/c/94c28af6fd89cb204975e49b824f8ee521bb84e9
- https://git.kernel.org/stable/c/ab949252fdf102ae74329a0caa7995a849d0dafa
- https://git.kernel.org/stable/c/d15f76fddc5d0215db5f18851048376a1ea79bd6
- https://git.kernel.org/stable/c/eb22420e5bd6eb3afa1f840036bb08a7ac90db76