9.8

CVE-2022-50410: NFSD: Protect against send buffer overflow in NFSv2 READ

Modified
AliasesUBUNTU-CVE-2022-50410DEBIAN-CVE-2022-50410
Published 18-09-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-50410 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 37.2% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.43%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 15 · Related 7
RHSA-2023:0832RHSA-2023:2458RHSA-2023:2951RHSA-2025:22006RHSA-2025:22752RHSA-2025:23445

Timeline

  1. 18-09-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: NFSD: Protect against send buffer overflow in NFSv2 READ Since before the git era, NFSD has conserved the number of pages held by each nfsd thread by combining the RPC receive and send buffers into a single array of pages. This works because there are no cases where an operation needs a large RPC Call message and a large RPC Reply at the same time. Once an RPC Call has been received, svc_process() updates svc_rqst::rq_res to describe the part of rq_pages that can be used for constructing the Reply. This means that the send buffer (rq_res) shrinks when the received RPC record containing the RPC Call is large. A client can force this shrinkage on TCP by sending a correctly- formed RPC Call header contained in an RPC record that is excessively large. The full maximum payload size cannot be constructed in that case.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.42% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu119 products
  • linuxAll versions (No fix recorded) | < 5.15.0-56.62
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1026.30
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 4452435948424e5322c2a2fefbdc2cf3732cc45d, < 2007867c5874134f2271eb276398208070049dd3 | ≥ 4452435948424e5322c2a2fefbdc2cf3732cc45d, < 2be9331ca6061bc6ea32247266f45b8b21030244 | ≥ 4452435948424e5322c2a2fefbdc2cf3732cc45d, < ea4c3eee0fd72fcedaa238556044825639cd3607 | ≥ 4452435948424e5322c2a2fefbdc2cf3732cc45d, < 1868332032eccbab8c1878a0d918193058c0a905 | ≥ 4452435948424e5322c2a2fefbdc2cf3732cc45d, < 401bc1f90874280a80b93f23be33a0e7e2d1f912 | 2.6.19
  • linux_kernel< 5.10.220 | ≥ 5.11, < 5.15.75 | ≥ 5.16, < 5.19.17 | ≥ 6.0, < 6.0.3
Debian1 product
  • linux< 6.0.3-1

3 vendors · 122 products

References

9 links