CVE-2021-47166: NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce()
Vulnerability summary
CVE-2021-47166 is a medium (CVSS 5.5) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.9% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 6 · Related 6Timeline
- 25-03-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce() The value of mirror->pg_bytes_written should only be updated after a successful attempt to flush out the requests on the list.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
15%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.24% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu86 products
- linuxAll versions (No fix recorded) | < 4.15.0-151.157 | < 5.4.0-80.90
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 4.15.0-1109.116 | < 5.4.0-1054.57
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ a7d42ddb3099727f58366fa006f850a219cce6c8, < e8b8418ce14ae66ee55179901edd12191ab06a9e | ≥ a7d42ddb3099727f58366fa006f850a219cce6c8, < b291baae24f876acd5a5dd57d0bb2bbac8a68b0c | ≥ a7d42ddb3099727f58366fa006f850a219cce6c8, < c757c1f1e65d89429db1409429436cf40d47c008 | ≥ a7d42ddb3099727f58366fa006f850a219cce6c8, < 40f139a6d50c232c0d1fd1c5e65a845c62db0ede | ≥ a7d42ddb3099727f58366fa006f850a219cce6c8, < 785917316b25685c9b3a2a88f933139f2de75e33 | ≥ a7d42ddb3099727f58366fa006f850a219cce6c8, < 7087db95c0a06ab201b8ebfac6a7ec1e34257997 | ≥ a7d42ddb3099727f58366fa006f850a219cce6c8, < 2fe1cac336b55a1f79e603e9ce3552c3623e90eb | ≥ a7d42ddb3099727f58366fa006f850a219cce6c8, < 0d0ea309357dea0d85a82815f02157eb7fcda39f | 4.0
- linux_kernel≥ 4.0, < 4.4.271 | ≥ 4.5, < 4.9.271 | ≥ 4.10, < 4.14.235 | ≥ 4.15, < 4.19.193 | ≥ 4.20, < 5.4.124 | ≥ 5.5, < 5.10.42 | ≥ 5.11, < 5.12.9 | 5.13:rc1 | 5.13:rc2 | 5.13:rc3
Debian1 product
- linux< 5.14.6-1
3 vendors · 89 products
