# CVE-2022-48828: linux: In the Linux kernel, the following vulnerability has been resolved:  NFSD: Fix ia_size underflow  iattr::ia_size is a...

CVE-2022-48828 is fixed in 9 products on 1 platform, first by DEBIAN-CVE-2022-48828, released July 16, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-48828
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0063
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 16, 2024

## 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().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | kernel-uek ol 8 | 0:5.4.17-2136.347.6.el7uek | [ELSA-2025-20553](https://patchblox.com/security/data/fix/linux/elsa-2025-20553.md) | Sep 9, 2025 |
| Linux | kernel-uek-container ol 8 | 0:5.4.17-2136.347.6.el7uek | [ELSA-2025-20553](https://patchblox.com/security/data/fix/linux/elsa-2025-20553.md) | Sep 9, 2025 |
| Linux | kernel-uek-container-debug ol 8 | 0:5.4.17-2136.347.6.el7uek | [ELSA-2025-20553](https://patchblox.com/security/data/fix/linux/elsa-2025-20553.md) | Sep 9, 2025 |
| Linux | kernel-uek-debug ol 8 | 0:5.4.17-2136.347.6.el7uek | [ELSA-2025-20553](https://patchblox.com/security/data/fix/linux/elsa-2025-20553.md) | Sep 9, 2025 |
| Linux | kernel-uek-debug-devel ol 8 | 0:5.4.17-2136.347.6.el7uek | [ELSA-2025-20553](https://patchblox.com/security/data/fix/linux/elsa-2025-20553.md) | Sep 9, 2025 |
| Linux | kernel-uek-devel ol 8 | 0:5.4.17-2136.347.6.el7uek | [ELSA-2025-20553](https://patchblox.com/security/data/fix/linux/elsa-2025-20553.md) | Sep 9, 2025 |
| Linux | kernel-uek-doc ol 8 | 0:5.4.17-2136.347.6.el7uek | [ELSA-2025-20553](https://patchblox.com/security/data/fix/linux/elsa-2025-20553.md) | Sep 9, 2025 |
| Linux | kernel-uek-tools ol 8 | 0:5.4.17-2136.347.6.el7uek | [ELSA-2025-20553](https://patchblox.com/security/data/fix/linux/elsa-2025-20553.md) | Sep 9, 2025 |
| Linux | linux Debian 12.15 (bookworm) | 5.16.10-1 | [DEBIAN-CVE-2022-48828](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48828.md) | Jul 16, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.16.10-1 | [DEBIAN-CVE-2022-48828](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48828.md) | Jul 16, 2024 |
| Linux | linux Debian 14 | 5.16.10-1 | [DEBIAN-CVE-2022-48828](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48828.md) | Jul 16, 2024 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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