9.1

CVE-2022-48828: NFSD: Fix ia_size underflow

Modified
AliasesUBUNTU-CVE-2022-48828DEBIAN-CVE-2022-48828
Published 16-07-2024Last modified 14-10-2026

Vulnerability summary

CVE-2022-48828 is a critical (CVSS 9.1) Integer Underflow (Wrap or Wraparound) vulnerability in linux. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 50.3% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.1 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.63%
0%100%
Low · 0.00 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 12 · Related 8
RHSA-2024:5266RHSA-2024:5281RHSA-2024:5282RHSA-2024:6992SUSE-SU-2024:2892-1SUSE-SU-2024:2894-1

Timeline

  1. 16-07-2024
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

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 metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.63%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.63% 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.

Ubuntu95 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d2211e6e34d0755f35e2f8c22d81999fa81cfc71 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 38d02ba22e43b6fc7d291cf724bc6e3b7be6626b | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 8e0ecaf7a7e57b30284d6b3289cc436100fadc48 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < da22ca1ad548429d7822011c54cfe210718e0aa7 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < e6faac3f58c7c4176b66f63def17a34232a17b0e | 2.6.12
  • linux_kernel< 5.4.295 | ≥ 5.5, < 5.10.220 | ≥ 5.11, < 5.15.24 | ≥ 5.16, < 5.16.10 | 5.17:rc1 | 5.17:rc2 | 5.17:rc3
Debian1 product
  • linux< 5.16.10-1

3 vendors · 98 products

References

11 links
Show all 11 references