9.8

CVE-2023-53751: cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname

Deferred
AliasesUBUNTU-CVE-2023-53751DEBIAN-CVE-2023-53751
Published 08-12-2025Last modified 05-08-2026

Vulnerability summary

CVE-2023-53751 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 35.8% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.41%
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 15 · Related 5
RHSA-2024:2394RHSA-2025:19447RHSA-2026:1512RHSA-2026:1886RHSA-2026:1909RHSA-2026:1946

Timeline

  1. 08-12-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname TCP_Server_Info::hostname may be updated once or many times during reconnect, so protect its access outside reconnect path as well and then prevent any potential use-after-free bugs.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

36%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.41% 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

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu120 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)
Debian1 product
  • linux< 6.1.37-1 | < 6.3.7-1
Linux1 product
  • linux≥ 93d5cb517db39e8af8d1292f9e785e4983b7f708, < 64d62ac6d6514cba1305bd08e271ec1843bdd612 | ≥ 93d5cb517db39e8af8d1292f9e785e4983b7f708, < c511954bf142fe1995aec3c739a9f1a76990283a | ≥ 93d5cb517db39e8af8d1292f9e785e4983b7f708, < 0b08c4c499200be67d54c439d56e5ea866869945 | ≥ 93d5cb517db39e8af8d1292f9e785e4983b7f708, < 90c49fce1c43e1cc152695e20363ff5087897c09 | 5.0

3 vendors · 122 products

References

8 links