CVE-2026-43239
smb: client: prevent races in ->query_interfaces()
Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: prevent races in ->query_interfaces() It was possible for two query interface works to be concurrently trying to update the interfaces. Prevent this by checking and updating iface_last_update under iface_lock.
INFO
Published Date :
May 6, 2026, 12:16 p.m.
Last Modified :
May 12, 2026, 6:53 p.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Apply Linux kernel security updates.
- Ensure interface updates are protected by iface_lock.
- Review SMB client code for similar race conditions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-43239.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-43239 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-43239
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-43239 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-43239 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
May. 12, 2026
Action Type Old Value New Value Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.19:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.19:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.19:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.19:rc8:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.75 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.16 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 6.19.6 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.19.1 up to (excluding) 6.6.128 Added Reference Type kernel.org: https://git.kernel.org/stable/c/6287eefaf21ec805d42f941bd368018cf397a7f5 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/76cc4faba0343c6db945b8dc75425b33d633e1b8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/93e8e3ee165ae4609a1222b516b573837103d2c3 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ab6564f416a6eaf1199200b6100952407b438f7d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c3c06e42e1527716c54f3ad2ced6a034b5f3a489 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 06, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: smb: client: prevent races in ->query_interfaces() It was possible for two query interface works to be concurrently trying to update the interfaces. Prevent this by checking and updating iface_last_update under iface_lock. Added Reference https://git.kernel.org/stable/c/6287eefaf21ec805d42f941bd368018cf397a7f5 Added Reference https://git.kernel.org/stable/c/76cc4faba0343c6db945b8dc75425b33d633e1b8 Added Reference https://git.kernel.org/stable/c/93e8e3ee165ae4609a1222b516b573837103d2c3 Added Reference https://git.kernel.org/stable/c/ab6564f416a6eaf1199200b6100952407b438f7d Added Reference https://git.kernel.org/stable/c/c3c06e42e1527716c54f3ad2ced6a034b5f3a489