7.1

CVE-2021-47401: ipack: ipoctal: fix stack information leak

Modified
AliasesUBUNTU-CVE-2021-47401DEBIAN-CVE-2021-47401
Published 21-05-2024Last modified 05-08-2026

Vulnerability summary

CVE-2021-47401 is a high (CVSS 7.1) Exposure of Resource to Wrong Sphere vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 16.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.1, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.25%
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 8 · Related 8
SUSE-SU-2024:1979-1SUSE-SU-2024:1983-1SUSE-SU-2024:2008-1SUSE-SU-2024:2011-1SUSE-SU-2024:2019-1SUSE-SU-2024:2184-1

Timeline

  1. 21-05-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ipack: ipoctal: fix stack information leak The tty driver name is used also after registering the driver and must specifically not be allocated on the stack to avoid leaking information to user space (or triggering an oops). Drivers should not try to encode topology information in the tty device name but this one snuck in through staging without anyone noticing and another driver has since copied this malpractice. Fixing the ABI is a separate issue, but this at least plugs the security hole.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.25% 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: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu87 products
  • linuxAll versions (No fix recorded) | < 4.15.0-163.171 | < 5.4.0-91.102
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1116.123 | < 5.4.0-1060.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ ba4dc61fe8c545a5d6a68b63616776556b771f51, < acb96e782bad427ca4bb1bd94af660acd1462380 | ≥ ba4dc61fe8c545a5d6a68b63616776556b771f51, < 741ea2670e021350e54f491106bdaa22dc50e6a0 | ≥ ba4dc61fe8c545a5d6a68b63616776556b771f51, < 2725925982dc96a78069cd118ea3d66759bfdad7 | ≥ ba4dc61fe8c545a5d6a68b63616776556b771f51, < 829f13d6079cf7a2465522f39acb43033e9b320d | ≥ ba4dc61fe8c545a5d6a68b63616776556b771f51, < 8657158a3b68c85234e6da3d8eae33d6183588b7 | ≥ ba4dc61fe8c545a5d6a68b63616776556b771f51, < 5f6a309a699675680df15d9b6d389114515b4426 | ≥ ba4dc61fe8c545a5d6a68b63616776556b771f51, < 0a9c36a2e06a249acbed64e8e0b84637c2ad7575 | ≥ ba4dc61fe8c545a5d6a68b63616776556b771f51, < a89936cce87d60766a75732a9e7e25c51164f47c | 3.5
  • linux_kernel≥ 3.5, < 4.4.286 | ≥ 4.5, < 4.9.285 | ≥ 4.10, < 4.14.249 | ≥ 4.15, < 4.19.209 | ≥ 4.20, < 5.4.151 | ≥ 5.5, < 5.10.71 | ≥ 5.11, < 5.14.10 | 5.15:rc1 | 5.15:rc2 | 5.15:rc3
Debian1 product
  • linux< 5.14.12-1

3 vendors · 90 products

References

12 links
Show all 12 references