CVE-2026-31710: Linux vulnerability

CVE-2026-31710: smb: client: fix dir separator in SMB1 UNIX mounts

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix dir separator in SMB1 UNIX mounts When calling cifs_mount_get_tcon() with SMB1 UNIX mounts, @cifs_sb->mnt_cifs_flags needs to be read or updated only after calling reset_cifs_unix_caps(), otherwise it might end up with missing CIFS_MOUNT_POSIXACL and CIFS_MOUNT_POSIX_PATHS bits. This fixes the wrong dir separator used in paths caused by the missing CIFS_MOUNT_POSIX_PATHS bit in cifs_sb_info::mnt_cifs_flags.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 21, 2026, 13:13 UTC (UTC+00:00)

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 1, 2026, 13:56 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

0ADP providers

3Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
Mar 9, 2026, 15:48 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
May 1, 2026, 13:56 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Sep 21, 2026, 13:13 UTC (UTC+00:00)

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/fbbfcf35e1ee3396631f3dc6214cb626aa9814c3CVE reference, Linux
https://git.kernel.org/stable/c/c4d3fc5844d685441befd0caaab648321013cdfdCVE reference, Linux

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinux4fc3a433c13944ee5766ec5b9bf6f1eb4d29b880, 4fc3a433c13944ee5766ec5b9bf6f1eb4d29b880, 9d9f6e06123001208cd8ae6332c7e814ab709169, 6.18.53unaffected

LinuxLinux7.0, 0, 7.0.2, 7.1affected

Weakness

CWE details

No CWE listed

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