CVE-2023-53998: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2023-53998DEBIAN-CVE-2023-53998
Published 24-12-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2023-53998 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.7% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 12
SUSE-SU-2026:0263-1SUSE-SU-2026:0278-1SUSE-SU-2026:0281-1SUSE-SU-2026:0293-1SUSE-SU-2026:0315-1SUSE-SU-2026:0317-1

Timeline

  1. 24-12-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: hwrng: virtio - Fix race on data_avail and actual data The virtio rng device kicks off a new entropy request whenever the data available reaches zero. When a new request occurs at the end of a read operation, that is, when the result of that request is only needed by the next reader, then there is a race between the writing of the new data and the next reader. This is because there is no synchronisation whatsoever between the writer and the reader. Fix this by writing data_avail with smp_store_release and reading it with smp_load_acquire when we first enter read. The subsequent reads are safe because they're either protected by the first load acquire, or by the completion mechanism. Also remove the redundant zeroing of data_idx in random_recv_done (data_idx must already be zero at this point) and data_avail in request_entropy (ditto).

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.21%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu124 products
  • linuxAll versions (No fix recorded) | < 5.4.0-166.183 | < 5.15.0-86.96
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1113.123 | < 5.15.0-1047.52
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.52-1 | < 6.4.4-1
Linux1 product
  • linux≥ f7f510ec195781c857ab76366a3e1c59e1caae42, < 241ef15776a7c8505008db689175b320d345ecd3 | ≥ f7f510ec195781c857ab76366a3e1c59e1caae42, < a43bcb0b661cbbf3ad797d2aee6b6fd06b8fc69d | ≥ f7f510ec195781c857ab76366a3e1c59e1caae42, < 77471e4912d3960dafe141e268c44be8024fe4dc | ≥ f7f510ec195781c857ab76366a3e1c59e1caae42, < c76d991b6f01a5d931e7053a73bc9524975a5215 | ≥ f7f510ec195781c857ab76366a3e1c59e1caae42, < 22c30022cde6e2c88612b3a499223cfa912f1bc7 | ≥ f7f510ec195781c857ab76366a3e1c59e1caae42, < 318657b4c2077289659f1cd9e2a34f6a3b208e3e | ≥ f7f510ec195781c857ab76366a3e1c59e1caae42, < 2fc91f156b3f3446a1bce80cf4adedcbf41271c2 | ≥ f7f510ec195781c857ab76366a3e1c59e1caae42, < ac52578d6e8d300dd50f790f29a24169b1edd26c | 2.6.26

3 vendors · 126 products

References

11 links
Show all 11 references