9.8

CVE-2023-53006: cifs: Fix oops due to uncleared server->smbd_conn in reconnect

Modified
AliasesUBUNTU-CVE-2023-53006DEBIAN-CVE-2023-53006
Published 27-03-2025Last modified 15-10-2026

Vulnerability summary

CVE-2023-53006 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 46.2% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.55%
0%100%
Low · +0.01 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 5
RHSA-2023:6583SUSE-SU-2025:1176-1SUSE-SU-2025:1183-1SUSE-SU-2025:1195-1SUSE-SU-2025:1241-1SUSE-SU-2025:1293-1

Timeline

  1. 27-03-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix oops due to uncleared server->smbd_conn in reconnect In smbd_destroy(), clear the server->smbd_conn pointer after freeing the smbd_connection struct that it points to so that reconnection doesn't get confused.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.55%

Chance of exploitation in the next 30 days

Percentile

46%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.54% 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.

Ubuntu109 products
  • linux< 5.4.0-147.164 | < 5.15.0-70.77
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1100.108 | < 5.15.0-1034.38
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8ef130f9ec27973f7b49e20c5a3b9134ca33026c, < a9640c0b268405f2540e8203a545e930ea88bb7d | ≥ 8ef130f9ec27973f7b49e20c5a3b9134ca33026c, < 91be54849d5392050f5b847b42bd5e6221551ac8 | ≥ 8ef130f9ec27973f7b49e20c5a3b9134ca33026c, < e037baee16e0b9ace7e730888fcae9cec11daff2 | ≥ 8ef130f9ec27973f7b49e20c5a3b9134ca33026c, < 4b83bc6f87eedab4599b0123e572a422689444be | ≥ 8ef130f9ec27973f7b49e20c5a3b9134ca33026c, < 5109607a4ece7cd8536172bf7549eb4dce1f3576 | ≥ 8ef130f9ec27973f7b49e20c5a3b9134ca33026c, < b7ab9161cf5ddc42a288edf9d1a61f3bdffe17c7 | 4.16
  • linux_kernel≥ 4.16, < 4.19.272 | ≥ 4.20, < 5.4.231 | ≥ 5.5, < 5.10.166 | ≥ 5.11, < 5.15.91 | ≥ 5.16, < 6.1.9 | 6.2:rc1 | 6.2:rc2 | 6.2:rc3 | 6.2:rc4 | 6.2:rc5
Debian1 product
  • linux< 6.1.11-1

3 vendors · 112 products

References

10 links