CVE-2022-48828
NFSD: Fix ia_size underflow
- Published
- Updated
- Reserved
- Assigned by
- Linux
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().
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.63% · top 50% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.1.
Weakness
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < d2211e6e34d0755f35e2f8c22d81999fa81cfc71
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 38d02ba22e43b6fc7d291cf724bc6e3b7be6626b
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 8e0ecaf7a7e57b30284d6b3289cc436100fadc48
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < da22ca1ad548429d7822011c54cfe210718e0aa7
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < e6faac3f58c7c4176b66f63def17a34232a17b0e
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 5.4.295 – ≤ 5.4.*
- unaffected 5.10.220 – ≤ 5.10.*
- unaffected 5.15.24 – ≤ 5.15.*
- unaffected 5.16.10 – ≤ 5.16.*
- unaffected 5.17 – ≤ *
References (7)
- https://git.kernel.org/stable/c/d2211e6e34d0755f35e2f8c22d81999fa81cfc71 (opens in a new tab)
- https://git.kernel.org/stable/c/38d02ba22e43b6fc7d291cf724bc6e3b7be6626b (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/8e0ecaf7a7e57b30284d6b3289cc436100fadc48 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/da22ca1ad548429d7822011c54cfe210718e0aa7 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/e6faac3f58c7c4176b66f63def17a34232a17b0e (opens in a new tab)x_transferred
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-48828)Record last updated .