CVE-2025-22039

ksmbd: fix overflow in dacloffset bounds check

CVSS 3.1 8.8 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2025-22039

Published

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix overflow in dacloffset bounds check The dacloffset field was originally typed as int and used in an unchecked addition, which could overflow and bypass the existing bounds check in both smb_check_perm_dacl() and smb_inherit_dacl(). This could result in out-of-bounds memory access and a kernel crash when dereferencing the DACL pointer. This patch converts dacloffset to unsigned int and uses check_add_overflow() to validate access to the DACL.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2025-22039

Published

Linux

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/server/smbacl.c"
                    ],
                    "versions": [
                        {
                            "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
                            "lessThan": "abbb4ec41867f2cd1c971258e493893bf43bcbd3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
                            "lessThan": "8483d7b532be1d1bc149556a2fedf903868c6303",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
                            "lessThan": "73f074fb5e139cd42ad75089abe4e28a49a30003",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
                            "lessThan": "6a9cd9ff0fa2bcc30b2bfb8bdb161eb20e44b9dc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
                            "lessThan": "6b8d379048b168a0dff5ab1acb975b933f368514",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
                            "lessThan": "443b373a4df5a2cb9f7b8c4658b2afedeb16397f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
                            "lessThan": "beff0bc9d69bc8e733f9bca28e2d3df5b3e10e42",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

Linux

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/server/smbacl.c"
                    ],
                    "versions": [
                        {
                            "version": "5.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.221",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.23",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.13.11",
                            "lessThanOrEqual": "6.13.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.14.2",
                            "lessThanOrEqual": "6.14.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON