CVE-2026-46191

In the Linux kernel, the following vulnerability has been resolved: fbcon: Avoid OOB font access if console rotation fails Clear the font buffer if the reallocation during console rotation fails in fbcon_rotate_font(). The putcs implementations for the rotated buffer will return early in this case. See [1] for an example. Currently, fbcon_rotate_font() keeps the old buffer, which is too small for the rotated font. Printing to the rotated console with a high-enough character code will overflow the font buffer. v2: - fix typos in commit message

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/46cf3646dea54baeaa2eafe3fb1ba769947f31b0
https://git.kernel.org/stable/c/524a6079395916fb3d790ef2bb46a1d2939b27dd
https://git.kernel.org/stable/c/594973a2e54924d8ba31c9faac669fc1ba6fcb80	Patch
https://git.kernel.org/stable/c/7105d9f1387d63b15c9a860674fc92c959181f2f	Patch
https://git.kernel.org/stable/c/ab6c34b9829d5de03f1d08a47a2253729a6e7e27	Patch
https://git.kernel.org/stable/c/b44cc78ff46b96e72d333a3be6aaaa0a14797263	Patch
https://git.kernel.org/stable/c/b51c343a81e6e806525a4435e22532c107dd7e9d
https://git.kernel.org/stable/c/e4ef723d8975a2694cc90733a6b888a5e2841842	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::::::::

History

No history.

Information

Published : 2026-05-28 10:16

Updated : 2026-06-19 13:16

NVD link : CVE-2026-46191

Mitre link : CVE-2026-46191

CVE.ORG link : CVE-2026-46191

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-125

Out-of-bounds Read

{"id": "CVE-2026-46191", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 1.8}]}, "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": "6cc50e1c5b57180fd37a31282000f43859b0fe73", "lessThan": "b51c343a81e6e806525a4435e22532c107dd7e9d", "versionType": "git"}, {"status": "affected", "version": "6cc50e1c5b57180fd37a31282000f43859b0fe73", "lessThan": "46cf3646dea54baeaa2eafe3fb1ba769947f31b0", "versionType": "git"}, {"status": "affected", "version": "6cc50e1c5b57180fd37a31282000f43859b0fe73", "lessThan": "524a6079395916fb3d790ef2bb46a1d2939b27dd", "versionType": "git"}, {"status": "affected", "version": "6cc50e1c5b57180fd37a31282000f43859b0fe73", "lessThan": "594973a2e54924d8ba31c9faac669fc1ba6fcb80", "versionType": "git"}, {"status": "affected", "version": "6cc50e1c5b57180fd37a31282000f43859b0fe73", "lessThan": "ab6c34b9829d5de03f1d08a47a2253729a6e7e27", "versionType": "git"}, {"status": "affected", "version": "6cc50e1c5b57180fd37a31282000f43859b0fe73", "lessThan": "7105d9f1387d63b15c9a860674fc92c959181f2f", "versionType": "git"}, {"status": "affected", "version": "6cc50e1c5b57180fd37a31282000f43859b0fe73", "lessThan": "b44cc78ff46b96e72d333a3be6aaaa0a14797263", "versionType": "git"}, {"status": "affected", "version": "6cc50e1c5b57180fd37a31282000f43859b0fe73", "lessThan": "e4ef723d8975a2694cc90733a6b888a5e2841842", "versionType": "git"}], "programFiles": ["drivers/video/fbdev/core/fbcon_rotate.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.15"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.15", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.259", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.210", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.176", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.140", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.90", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.32", "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": ["drivers/video/fbdev/core/fbcon_rotate.c"], "defaultStatus": "affected"}]}], "published": "2026-05-28T10:16:34.740", "references": [{"url": "https://git.kernel.org/stable/c/46cf3646dea54baeaa2eafe3fb1ba769947f31b0", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/524a6079395916fb3d790ef2bb46a1d2939b27dd", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/594973a2e54924d8ba31c9faac669fc1ba6fcb80", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7105d9f1387d63b15c9a860674fc92c959181f2f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ab6c34b9829d5de03f1d08a47a2253729a6e7e27", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b44cc78ff46b96e72d333a3be6aaaa0a14797263", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b51c343a81e6e806525a4435e22532c107dd7e9d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e4ef723d8975a2694cc90733a6b888a5e2841842", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "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\nfbcon: Avoid OOB font access if console rotation fails\n\nClear the font buffer if the reallocation during console rotation fails\nin fbcon_rotate_font(). The putcs implementations for the rotated buffer\nwill return early in this case. See [1] for an example.\n\nCurrently, fbcon_rotate_font() keeps the old buffer, which is too small\nfor the rotated font. Printing to the rotated console with a high-enough\ncharacter code will overflow the font buffer.\n\nv2:\n- fix typos in commit message"}], "lastModified": "2026-06-19T13:16:34.980", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "72788083-DE76-436F-8F3A-A2B84197FB84", "versionEndExcluding": "6.6.140", "versionStartIncluding": "2.6.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3BAAA2BE-6EEC-45D5-AD66-50F63CA20483", "versionEndExcluding": "6.12.90", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CB9F1FA8-6D5E-42B1-9877-57BACFE5C886", "versionEndExcluding": "6.18.32", "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"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}