{"id":"CVE-2026-46054","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: fix overlayfs mmap() and mprotect() access checks\n\nThe existing SELinux security model for overlayfs is to allow access if\nthe current task is able to access t…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: fix overlayfs mmap() and mprotect() access checks\n\nThe existing SELinux security model for overlayfs is to allow access if\nthe current task is able to access t…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-280"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.19, < 7.0.4"],"patched":["linux_kernel 7.0.4"],"published":"2026-05-27","updated":"2026-09-16","sourceUpdated":"2026-09-16T13:17:59.623","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-46054","references":[{"url":"https://git.kernel.org/stable/c/82544d36b1729153c8aeb179e84750f0c085d3b1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8bacd09f12c27710228562e4d13163e58c5f4a45","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bc6c380c1159de52a252ed11f19a42c47f60a735","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cd0e707a927a70cdfd8bc5a512a9719a87f5ed51","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d844702198395d3f80222777030f69db6be6b709","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://access.redhat.com/errata/RHSA-2026:25191","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:27811","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:27812","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:30848","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:51746","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:52649","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:52667","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:52764","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:59091","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:59473","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:67721","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:67723","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-46054","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2482025","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46054.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46054"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46054"},{"url":"https://lore.kernel.org/linux-cve-announce/2026052754-CVE-2026-46054-b185@gregkh/T"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00123,"epssPercentile":0.02408,"scores":{"nvd":7.1,"vendor":7,"cna":7.1},"ingestedAt":"2026-07-04T12:56:09.401Z","slug":"CVE-2026-46054","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nselinux: fix overlayfs mmap() and mprotect() access checks\n\nThe existing SELinux security model for overlayfs is to allow access if\nthe current task is able to access the top level file (the \"user\" file)\nand the mounter's credentials are sufficient to access the lower\nlevel file (the \"backing\" file).  Unfortunately, the current code does\nnot properly enforce these access controls for both mmap() and mprotect()\noperations on overlayfs filesystems.\n\nThis patch makes use of the newly created security_mmap_backing_file()\nLSM hook to provide the missing backing file enforcement for mmap()\noperations, and leverages the backing file API and new LSM blob to\nprovide the necessary information to properly enforce the mprotect()\naccess controls.\n\n## Affected\n\n- `linux_kernel >= 4.19, < 7.0.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.4`\n\n## Vendor advisories\n\n- **RHSA-2026:52764** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0), Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0), Red Hat Enterprise Linux Real Time EUS (v. 10.0) · released 2026-08-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:52764)\n- **RHSA-2026:25191** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), Red Hat Enterprise Linux Real Time (v. 10) · released 2026-06-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:25191)\n- **RHSA-2026:51746** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux BaseOS E4S (v.9.4), Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4), Red Hat Enterprise Linux Real Time E4S (v.9.4) · released 2026-08-07 · [advisory](https://access.redhat.com/errata/RHSA-2026:51746)\n- **RHSA-2026:52667** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux BaseOS EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6), Red Hat Enterprise Linux Real Time EUS (v.9.6) · released 2026-08-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:52667)\n- **RHSA-2026:30848** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9), Red Hat Enterprise Linux Real Time (v. 9) · released 2026-06-29 · [advisory](https://access.redhat.com/errata/RHSA-2026:30848)\n- **RHSA-2026:27811** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-06-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:27811)\n- **RHSA-2026:59091** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:59091)\n- **RHSA-2026:59473** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS AUS (v.8.6), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) · released 2026-08-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:59473)\n- **RHSA-2026:52649** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS E4S (v.8.8), Red Hat Enterprise Linux BaseOS TUS (v.8.8) · released 2026-08-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:52649)\n- **RHSA-2026:27812** · Red Hat · fixed in: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8) · released 2026-06-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:27812)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46054.json)\n- **RHSA-2026:67723** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS E4S (v.9.2) · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:67723)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}