5.5

CVE-2021-47539: rxrpc: Fix rxrpc_peer leak in rxrpc_look_up_bundle()

Analyzed
AliasesUBUNTU-CVE-2021-47539DEBIAN-CVE-2021-47539
Published 24-05-2024Last modified 11-05-2026

Vulnerability summary

CVE-2021-47539 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.8% 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
0.22%
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 3 · Related 3
SUSE-SU-2024:2372-1SUSE-SU-2024:2394-1SUSE-SU-2024:2939-1

Timeline

  1. 24-05-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

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

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.22% 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.

Ubuntu62 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ 245500d853e9f20036cec7df4f6984ece4c6bf26, < 35b40f724c4ef0f683d94dab3af9ab38261d782b | ≥ 245500d853e9f20036cec7df4f6984ece4c6bf26, < bc97458620e38961af9505cc060ad4cf5c9e4af7 | ≥ 245500d853e9f20036cec7df4f6984ece4c6bf26, < ca77fba821351190777b236ce749d7c4d353102e | 5.10
  • linux_kernel≥ 5.10, < 5.10.84 | ≥ 5.11, < 5.15.7 | 5.16:rc1 | 5.16:rc2 | 5.16:rc3
Debian1 product
  • linux< 5.15.15-1

3 vendors · 65 products

References

7 links