Description (CNA)
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().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d2211e6e34d0755f35e2f8c22d81999fa81cfc71; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 38d02ba22e43b6fc7d291cf724bc6e3b7be6626b; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8e0ecaf7a7e57b30284d6b3289cc436100fadc48; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before da22ca1ad548429d7822011c54cfe210718e0aa7; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before e6faac3f58c7c4176b66f63def17a34232a17b0e |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 5.4.295 through 5.4.*; unaffected 5.10.220 through 5.10.*; unaffected 5.15.24 through 5.15.*; unaffected 5.16.10 through 5.16.*; unaffected 5.17 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d2211e6e34d0755f35e2f8c22d81999fa81cfc71
- https://git.kernel.org/stable/c/38d02ba22e43b6fc7d291cf724bc6e3b7be6626b
- https://git.kernel.org/stable/c/8e0ecaf7a7e57b30284d6b3289cc436100fadc48
- https://git.kernel.org/stable/c/da22ca1ad548429d7822011c54cfe210718e0aa7
- https://git.kernel.org/stable/c/e6faac3f58c7c4176b66f63def17a34232a17b0e
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.
No English description supplied.