Updated: 2025-09-28 04:01:09.470312
Description:
In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix ia_size underflow iattr::ia_size is a loff_t, which is a signed 64-bit type. NFSv3 and NFSv4 both define file size as an unsigned 64-bit type. Thus there is a range of valid file size values an NFS client can send that is already larger than Linux can handle. Currently decode_fattr4() dumps a full u64 value into ia_size. If that value happens to be larger than S64_MAX, then ia_size underflows. I'm about to fix up the NFSv3 behavior as well, so let's catch the underflow in the common code path: nfsd_setattr().
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | 0.0 | |
| CVSS Version 3.x | MEDIUM | 5.5 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| CentOS 6 ELS | kernel | 2.6.32 | 5.5 | MEDIUM | Ignored | 2025-09-30 16:02:33 | Ignored due to low severity | |
| CentOS 8.4 ELS | kernel | 4.18.0 | 5.5 | MEDIUM | Ignored | 2025-09-30 16:02:32 | Ignored due to low severity | |
| CentOS 8.5 ELS | kernel | 4.18.0 | 5.5 | MEDIUM | Ignored | 2025-09-30 16:02:33 | Ignored due to low severity | |
| Oracle Linux 6 ELS | kernel | 2.6.32 | 5.5 | MEDIUM | Ignored | 2025-09-30 16:02:32 | Ignored due to low severity | |
| Oracle Linux 7 ELS | kernel-uek | 5.4.17 | 5.5 | MEDIUM | Released | CLSA-2025:1757963029 | 2025-09-16 11:21:19 | |
| Ubuntu 16.04 ELS | linux-hwe | 4.15.0 | 5.5 | MEDIUM | Ignored | 2025-09-30 16:05:47 | Ignored due to low severity | |
| Ubuntu 16.04 ELS | linux | 4.4.0 | 5.5 | MEDIUM | Ignored | 2025-09-30 16:04:45 | Ignored due to low severity |