5.5

CVE-2021-47538: rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer()

Analyzed
AliasesUBUNTU-CVE-2021-47538DEBIAN-CVE-2021-47538
Published 24-05-2024Last modified 23-05-2026

Vulnerability summary

CVE-2021-47538 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.24%
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 6 · Related 6
SUSE-SU-2024:2010-1SUSE-SU-2024:2183-1SUSE-SU-2024:2185-1SUSE-SU-2024:2372-1SUSE-SU-2024:2394-1SUSE-SU-2024:2939-1

Timeline

  1. 24-05-2024
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer() Need to call rxrpc_put_local() for peer candidate before kfree() as it holds a ref to rxrpc_local. [DH: v2: Changed to abstract the peer freeing code out into a function]

CVSS metrics

4 scores · 3 sources · 2 versions

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

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.

Ubuntu84 products
  • linux< 5.4.0-100.113
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1066.69
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ e8e51ce79c157188e209e5ea0afaf6b42dd76104, < 913c24af2d13a3fd304462916ee98e298d56bdce | ≥ 9ebeddef58c41bd700419cdcece24cf64ce32276, < 3e70e3a72d80b16094faccbe438cd53761c3503a | ≥ 9ebeddef58c41bd700419cdcece24cf64ce32276, < 60f0b9c42cb80833a03ca57c1c8b078d716e71d1 | ≥ 9ebeddef58c41bd700419cdcece24cf64ce32276, < 9469273e616ca8f1b6e3773c5019f21b4c8d828c | ≥ 9ebeddef58c41bd700419cdcece24cf64ce32276, < beacff50edbd6c9659a6f15fc7f6126909fade29 | 9b7fc03b4cdbfb668b6891967105258691c6d3b5 | ≥ 4.19.82, < 4.19.220 | ≥ 5.3.9, < 5.4 | 5.4
  • linux_kernelEOL≥ 4.19.82, < 4.19.220 | ≥ 5.3.9, < 5.4 | ≥ 5.4.1, < 5.4.164 | ≥ 5.5, < 5.10.84 | ≥ 5.11, < 5.15.7 | 5.4 | 5.4:rc4 | 5.4:rc5 | 5.4:rc6 | 5.4:rc7 | 5.4:rc8 | 5.16:rc1 | 5.16:rc2 | 5.16:rc3
Debian1 product
  • linux< 5.15.15-1

3 vendors · 87 products

References

9 links