CVE-2026-46185

In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in symlink_data() Since smb2_check_message() returns success without length validation for the symlink error response, in symlink_data() it is possible for iov->iov_len to be smaller than sizeof(struct smb2_err_rsp). If the buffer only contains the base SMB2 header (64 bytes), accessing err->ErrorContextCount (at offset 66) or err->ByteCount later in symlink_data() will cause an out-of-bounds read.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/15dc0a4de743a1aaa7b859b3aea79f08c695396c	Patch
https://git.kernel.org/stable/c/2be11faf79e49fb8250a181ff0b4d2b2f084af83	Patch
https://git.kernel.org/stable/c/b8c8a704f0bc133deb171f6aeb6f3a684203e212	Patch
https://git.kernel.org/stable/c/b9561402489d41149f63e001a74384863b7b30a6	Patch
https://git.kernel.org/stable/c/d62b8d236fab503c6fec1d3e9a38bea71feaca20	Patch
https://git.kernel.org/stable/c/ef6495d4df6e7af8f3de67e65150881c880f696c	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc1::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc2::::::

History

No history.

Information

Published : 2026-05-28 10:16

Updated : 2026-06-17 10:53

NVD link : CVE-2026-46185

Mitre link : CVE-2026-46185

CVE.ORG link : CVE-2026-46185

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-125

Out-of-bounds Read

{"id": "CVE-2026-46185", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "76894f3e2f71177747b8b4763fb180e800279585", "lessThan": "2be11faf79e49fb8250a181ff0b4d2b2f084af83", "versionType": "git"}, {"status": "affected", "version": "76894f3e2f71177747b8b4763fb180e800279585", "lessThan": "ef6495d4df6e7af8f3de67e65150881c880f696c", "versionType": "git"}, {"status": "affected", "version": "76894f3e2f71177747b8b4763fb180e800279585", "lessThan": "15dc0a4de743a1aaa7b859b3aea79f08c695396c", "versionType": "git"}, {"status": "affected", "version": "76894f3e2f71177747b8b4763fb180e800279585", "lessThan": "b8c8a704f0bc133deb171f6aeb6f3a684203e212", "versionType": "git"}, {"status": "affected", "version": "76894f3e2f71177747b8b4763fb180e800279585", "lessThan": "b9561402489d41149f63e001a74384863b7b30a6", "versionType": "git"}, {"status": "affected", "version": "76894f3e2f71177747b8b4763fb180e800279585", "lessThan": "d62b8d236fab503c6fec1d3e9a38bea71feaca20", "versionType": "git"}, {"status": "affected", "version": "2d046892a493d9760c35fdaefc3017f27f91b621", "versionType": "git"}, {"status": "affected", "version": "6.0.16", "lessThan": "6.1", "versionType": "semver"}], "programFiles": ["fs/smb/client/smb2misc.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.1"}, {"status": "unaffected", "version": "0", "lessThan": "6.1", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.140", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.88", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.30", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.7", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/smb/client/smb2misc.c"], "defaultStatus": "affected"}]}], "published": "2026-05-28T10:16:34.117", "references": [{"url": "https://git.kernel.org/stable/c/15dc0a4de743a1aaa7b859b3aea79f08c695396c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2be11faf79e49fb8250a181ff0b4d2b2f084af83", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b8c8a704f0bc133deb171f6aeb6f3a684203e212", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b9561402489d41149f63e001a74384863b7b30a6", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d62b8d236fab503c6fec1d3e9a38bea71feaca20", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ef6495d4df6e7af8f3de67e65150881c880f696c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: fix out-of-bounds read in symlink_data()\n\nSince smb2_check_message() returns success without length validation for\nthe symlink error response, in symlink_data() it is possible for\niov->iov_len to be smaller than sizeof(struct smb2_err_rsp). If the buffer\nonly contains the base SMB2 header (64 bytes), accessing\nerr->ErrorContextCount (at offset 66) or err->ByteCount later in\nsymlink_data() will cause an out-of-bounds read."}], "lastModified": "2026-06-17T10:53:14.233", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F6B59BC3-B31E-4974-B7FC-12ECC3E05E29", "versionEndExcluding": "6.1.175", "versionStartIncluding": "6.0.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A1A92866-F406-43B5-B2D1-CFC274753E9D", "versionEndExcluding": "6.6.140", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5AFBE0EC-CCDF-4207-AE92-ABF958125CA4", "versionEndExcluding": "6.12.88", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BF39AE08-AE6D-4410-8FBE-76F6BF5BF55B", "versionEndExcluding": "6.18.30", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D0893CA7-9AE6-4DFE-AC75-48967D73AD8E", "versionEndExcluding": "7.0.7", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}