Vulnerability 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().
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.4.295 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/38d02ba22e43b6fc7d291cf724bc6e3b7be6626bPatch
- https://git.kernel.org/stable/c/8e0ecaf7a7e57b30284d6b3289cc436100fadc48Patch
- https://git.kernel.org/stable/c/d2211e6e34d0755f35e2f8c22d81999fa81cfc71Patch
- https://git.kernel.org/stable/c/da22ca1ad548429d7822011c54cfe210718e0aa7Patch
- https://git.kernel.org/stable/c/e6faac3f58c7c4176b66f63def17a34232a17b0ePatch
- https://git.kernel.org/stable/c/38d02ba22e43b6fc7d291cf724bc6e3b7be6626bPatch
- https://git.kernel.org/stable/c/8e0ecaf7a7e57b30284d6b3289cc436100fadc48Patch
- https://git.kernel.org/stable/c/da22ca1ad548429d7822011c54cfe210718e0aa7Patch
- https://git.kernel.org/stable/c/e6faac3f58c7c4176b66f63def17a34232a17b0ePatch
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
FAQ
What is CVE-2022-48828?
CVE-2022-48828 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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...
How severe is CVE-2022-48828?
CVE-2022-48828 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2022-48828?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.