CVE-2026-31693 | cifs: some missing initializations on replay

In the Linux kernel, the following vulnerability has been resolved: cifs: some missing initializations on replay In several places in the code, we have a label to signify the start of the code where a request can be replayed if necessary. However, some of these places were missing the necessary reinitializations of certain local variables before replay. This change makes sure that these variables get initialized after the label.

Published: 2026-04-30 Last update: 2026-05-07 Assigner: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-31693 is rated Low Risk (32.9/100): CVSS High severity, with low exploitation likelihood (EPSS 0.02%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-31693

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-01 — 0.02% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-31693

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Weakness enumeration for CVE-2026-31693

GitHub Security Advisory for CVE-2026-31693

GHSA-v5v4-gvc3-q8x8 · Severity: high — In the Linux kernel, the following vulnerability has been resolved: cifs: some missing...

OS Trackers for CVE-2026-31693

vendor priority summary link
debian unimportant CVE-2026-31693 unimportant priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2026-31693
redhat medium — https://access.redhat.com/security/cve/CVE-2026-31693
suse medium CVE-2026-31693 severity moderate: SUSE including 20 source package names (cluster-md-kmp-default, dlm-kmp-default, …), 157 product×package rows across 32 product lines (SUSE Linux Enterprise High Availability Extension 15 SP7, SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS, … (32 product lines)): Known Not Affected 157. https://www.suse.com/security/cve/CVE-2026-31693/
ubuntu medium CVE-2026-31693 medium priority: Ubuntu including 161 source packages (linux, linux-allwinner-5.19, …), 1449 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): DNE 1048, ignored 173, needed 129, released 83, not-affected 10, needs-triage 5, pending 1. https://ubuntu.com/security/CVE-2026-31693

Affected software / configurations for CVE-2026-31693

Vendor Product Version Raw CPE
linux linux_kernel >= 6.6.32, < 6.6.128 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.8.1, < 6.12.75 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.13, < 6.18.16 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.19, < 6.19.6 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel 6.8 cpe:2.3:o:linux:linux_kernel:6.8:-:*:*:*:*:*:*
linux linux_kernel 6.8 cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*
linux linux_kernel 6.8 cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*
linux linux_kernel 6.8 cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*
linux linux_kernel 6.8 cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:*
linux linux_kernel 6.8 cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:*
linux linux_kernel 6.8 cpe:2.3:o:linux:linux_kernel:6.8:rc7:*:*:*:*:*:*

References for CVE-2026-31693

cvelogic Threat Intelligence