CVE-2022-48827NFSD: Fix the behavior of READ near OFFSET_MAX
Updated under an hour ago ()
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In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix the behavior of READ near OFFSET_MAX Dan Aloni reports: > Due to commit 8cfb9015280d ("NFS: Always provide aligned buffers to > the RPC read layers") on the client, a read of 0xfff is aligned up > to server rsize of 0x1000. > > As a result, in a test where the server has a file of size > 0x7fffffffffffffff, and the client tries to read from the offset > 0x7ffffffffffff000, the read causes loff_t overflow in the server > and it returns an NFS code of EINVAL to the client. The client as > a result indefinitely retries the request. The Linux NFS client does not handle NFS?ERR_INVAL, even though all NFS specifications permit servers to return that status code for a READ. Instead of NFS?ERR_INVAL, have out-of-range READ requests succeed and return a short result. Set the EOF flag in the result to prevent the client from retrying the READ request. This behavior appears to be consistent with Solaris NFS servers. Note that NFSv3 and NFSv4 use u64 offset values on the wire. These must be converted to loff_t internally before use -- an implicit type cast is not adequate for this purpose. Otherwise VFS checks against sb->s_maxbytes do not work properly.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 1726a39b0879acfb490b22dca643f26f4f907da9; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before c6eff5c4277146a78b4fb8c9b668dd64542c41b0; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 44502aca8e02ab32d6b0eb52e006a5ec9402719b; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 builds before 0cb4d23ae08c48f6bf3c29a8e5c4a74b8388b960 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1.1 | CISA ADP |
linux linux_kernel linux:linux_kernel | before 5.10.220; from 5.11 before 5.15.24; from 5.16 before 5.16.10; 5.17; 5.17; 5.17 | NVD |
References
- https://git.kernel.org/stable/c/1726a39b0879acfb490b22dca643f26f4f907da9patch
- https://git.kernel.org/stable/c/c6eff5c4277146a78b4fb8c9b668dd64542c41b0patch
- https://git.kernel.org/stable/c/44502aca8e02ab32d6b0eb52e006a5ec9402719bpatch
- https://git.kernel.org/stable/c/0cb4d23ae08c48f6bf3c29a8e5c4a74b8388b960patch
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.