CVE-2026-46302

In the Linux kernel, the following vulnerability has been resolved: selinux: allow multiple opens of /sys/fs/selinux/policy Currently there can only be a single open of /sys/fs/selinux/policy at any time. This allows any process to block any other process from reading the kernel policy. The original motivation seems to have been a mix of preventing an inconsistent view of the policy size and preventing userspace from allocating kernel memory without bound, but this is arguably equally bad. Eliminate the policy_opened flag and shrink the critical section that the policy mutex is held. While we are making changes here, drop a couple of extraneous BUG_ONs.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0ed712134a3db0075bfe9a0f8536c48728ec745e
https://git.kernel.org/stable/c/714362f3779dfa453a78ced32396a72726962a41	Patch
https://git.kernel.org/stable/c/9795810d116bc9071485929ba6471dc8d5bd158b
https://git.kernel.org/stable/c/a02cd6805562305f936e807da83e253b719dd965	Patch
https://git.kernel.org/stable/c/c24d2e190b955baf3a95e05d34b192f61bd201b3
https://git.kernel.org/stable/c/d8cafd0226d5df682d1f4ea978a4318fe3a11210

Configurations

Configuration 1 (hide)

OR	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

30 Oct 2026, 13:19

Type	Values Removed	Values Added
References		() https://git.kernel.org/stable/c/9795810d116bc9071485929ba6471dc8d5bd158b -

21 Oct 2026, 13:19

Type	Values Removed	Values Added
References		() https://git.kernel.org/stable/c/0ed712134a3db0075bfe9a0f8536c48728ec745e - () https://git.kernel.org/stable/c/c24d2e190b955baf3a95e05d34b192f61bd201b3 - () https://git.kernel.org/stable/c/d8cafd0226d5df682d1f4ea978a4318fe3a11210 -

Information

Published : 2026-06-08 17:16

Updated : 2026-11-06 17:17

NVD link : CVE-2026-46302

Mitre link : CVE-2026-46302

CVE.ORG link : CVE-2026-46302

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

{"id": "CVE-2026-46302", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46302", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T16:13:45.536424Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "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": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "9795810d116bc9071485929ba6471dc8d5bd158b", "versionType": "git"}, {"status": "affected", "version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "d8cafd0226d5df682d1f4ea978a4318fe3a11210", "versionType": "git"}, {"status": "affected", "version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "0ed712134a3db0075bfe9a0f8536c48728ec745e", "versionType": "git"}, {"status": "affected", "version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "c24d2e190b955baf3a95e05d34b192f61bd201b3", "versionType": "git"}, {"status": "affected", "version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "714362f3779dfa453a78ced32396a72726962a41", "versionType": "git"}, {"status": "affected", "version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a", "lessThan": "a02cd6805562305f936e807da83e253b719dd965", "versionType": "git"}], "programFiles": ["security/selinux/selinuxfs.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.37"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.37", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.191", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.160", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.114", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.58", "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": ["security/selinux/selinuxfs.c"], "defaultStatus": "affected"}]}], "published": "2026-06-08T17:16:48.707", "references": [{"url": "https://git.kernel.org/stable/c/0ed712134a3db0075bfe9a0f8536c48728ec745e", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/714362f3779dfa453a78ced32396a72726962a41", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9795810d116bc9071485929ba6471dc8d5bd158b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a02cd6805562305f936e807da83e253b719dd965", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c24d2e190b955baf3a95e05d34b192f61bd201b3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d8cafd0226d5df682d1f4ea978a4318fe3a11210", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: allow multiple opens of /sys/fs/selinux/policy\n\nCurrently there can only be a single open of /sys/fs/selinux/policy at\nany time. This allows any process to block any other process from\nreading the kernel policy. The original motivation seems to have been\na mix of preventing an inconsistent view of the policy size and\npreventing userspace from allocating kernel memory without bound, but\nthis is arguably equally bad. Eliminate the policy_opened flag and\nshrink the critical section that the policy mutex is held. While we\nare making changes here, drop a couple of extraneous BUG_ONs."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nselinux: permitir m\u00faltiples aperturas de /sys/fs/selinux/policy\n\nActualmente solo puede haber una \u00fanica apertura de /sys/fs/selinux/policy en cualquier momento. Esto permite a cualquier proceso bloquear a cualquier otro proceso de leer la pol\u00edtica del kernel. La motivaci\u00f3n original parece haber sido una mezcla de prevenir una vista inconsistente del tama\u00f1o de la pol\u00edtica y evitar que el espacio de usuario asigne memoria del kernel sin l\u00edmites, pero esto es, discutiblemente, igual de malo. Eliminar el indicador policy_opened y reducir la secci\u00f3n cr\u00edtica en la que se mantiene el mutex de la pol\u00edtica. Mientras estamos haciendo cambios aqu\u00ed, eliminar un par de BUG_ONs superfluos."}], "lastModified": "2026-11-06T17:17:54.970", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DA80713D-F193-4E13-A301-ABB21A01CE03", "versionEndExcluding": "7.0.7", "versionStartIncluding": "2.6.37"}, {"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"}