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TI-2026-33778 Aliases CVE-2026-46054GHSA-xg2q-7399-f2r3

selinux: fix overlayfs mmap() and mprotect() access checks

Priority LOW 32CWE-862Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 38 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-862.

Summary

In the Linux kernel, the following vulnerability has been resolved: selinux: fix overlayfs mmap() and mprotect() access checks The existing SELinux security model for overlayfs is to allow access if the current task is able to access the top level file (the "user" file) and the mounter's credentials are sufficient to access the lower level file (the "backing" file). Unfortunately, the current code does not properly enforce these access controls for both mmap() and mprotect() operations on overlayfs filesystems. This patch makes use of the newly created security_mmap_backing_file() LSM hook to provide the missing backing file enforcement for mmap() operations, and leverages the backing file API and new LSM blob to provide the necessary information to properly enforce the mprotect() access controls.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00123 2nd percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.6.144, 6.12.95, 6.18.38 +2Red Hat: 12 advisoriesRed Hat: 38 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.19 and later6.6.144, 6.12.95, 6.18.38, 7.0.4, 7.1Patch availableCNA
  • Linux VendorLinux Affected 4.19 and later Fixed in 6.6.144, 6.12.95, 6.18.38, 7.0.4, 7.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.19 to before 7.0.4VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.19 to before 7.0.4 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.6.144, 6.12.95, 6.18.38, 7.0.4, 7.1

Red Hat 12 advisories

  • RHSA-2026:67723 Released 2026-09-16 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.191.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.191.1.el9_2, kernel-64k-devel-5.14.0-284.191.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.191.1.el9_2, kernel-5.14.0-284.191.1.el9_2, kernel-64k-5.14.0-284.191.1.el9_2 +29
  • RHSA-2026:67721 Released 2026-09-16 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-core-5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-debug-5.14.0-284.191.1.rt14.476.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-core-5.14.0-284.191.1.rt14.476.el9_2, kernel-rt-debug-5.14.0-284.191.1.rt14.476.el9_2 +11
  • RHSA-2026:59473 Released 2026-08-25 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.208.1.el8_6, kernel-4.18.0-372.208.1.el8_6, kernel-abi-stablelists-4.18.0-372.208.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.208.1.el8_6, kernel-4.18.0-372.208.1.el8_6, kernel-abi-stablelists-4.18.0-372.208.1.el8_6 +14
Show 9 more Red Hat advisories
  • RHSA-2026:59091 Released 2026-08-24 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.201.1.el8_4, kernel-4.18.0-305.201.1.el8_4, kernel-abi-stablelists-4.18.0-305.201.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.201.1.el8_4, kernel-4.18.0-305.201.1.el8_4, kernel-abi-stablelists-4.18.0-305.201.1.el8_4 +14
  • RHSA-2026:52764 Released 2026-08-10 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.95.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.95.1.el10_0, kernel-64k-devel-6.12.0-55.95.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.95.1.el10_0, kernel-64k-6.12.0-55.95.1.el10_0, kernel-64k-core-6.12.0-55.95.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.95.1.el10_0, libperf-6.12.0-55.95.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.95.1.el10_0, kernel-rt-64k-6.12.0-55.95.1.el10_0, kernel-rt-64k-core-6.12.0-55.95.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.95.1.el10_0, kernel-rt-core-6.12.0-55.95.1.el10_0, kernel-rt-debug-6.12.0-55.95.1.el10_0 +11
  • RHSA-2026:52667 Released 2026-08-10 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.132.1.el9_6, libperf-5.14.0-570.132.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.132.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.132.1.el9_6, kernel-64k-devel-5.14.0-570.132.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.132.1.el9_6, kernel-64k-5.14.0-570.132.1.el9_6, kernel-64k-core-5.14.0-570.132.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.132.1.el9_6, kernel-rt-64k-5.14.0-570.132.1.el9_6, kernel-rt-64k-core-5.14.0-570.132.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.132.1.el9_6, kernel-rt-core-5.14.0-570.132.1.el9_6, kernel-rt-debug-5.14.0-570.132.1.el9_6 +11
  • RHSA-2026:52649 Released 2026-08-10 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.158.1.el8_8, kernel-4.18.0-477.158.1.el8_8, kernel-abi-stablelists-4.18.0-477.158.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.158.1.el8_8, kernel-4.18.0-477.158.1.el8_8, kernel-abi-stablelists-4.18.0-477.158.1.el8_8 +14
  • RHSA-2026:51746 Released 2026-08-07 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) kernel-64k-debug-devel-5.14.0-427.143.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.143.1.el9_4, kernel-64k-devel-5.14.0-427.143.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool-7.3.0-427.143.1.el9_4, kernel-5.14.0-427.143.1.el9_4, kernel-64k-5.14.0-427.143.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt-5.14.0-427.143.1.el9_4, kernel-rt-core-5.14.0-427.143.1.el9_4, kernel-rt-debug-5.14.0-427.143.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt-5.14.0-427.143.1.el9_4, kernel-rt-core-5.14.0-427.143.1.el9_4, kernel-rt-debug-5.14.0-427.143.1.el9_4 +11
  • RHSA-2026:30848 Released 2026-06-29 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.19.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.19.1.el9_8, kernel-64k-devel-5.14.0-687.19.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.19.1.el9_8, kernel-64k-5.14.0-687.19.1.el9_8, kernel-64k-core-5.14.0-687.19.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.19.1.el9_8, libperf-5.14.0-687.19.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.19.1.el9_8, kernel-rt-64k-5.14.0-687.19.1.el9_8, kernel-rt-64k-core-5.14.0-687.19.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.19.1.el9_8, kernel-rt-core-5.14.0-687.19.1.el9_8, kernel-rt-debug-5.14.0-687.19.1.el9_8 +9
  • RHSA-2026:27811 Released 2026-06-22 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.137.1.el8_10, kernel-4.18.0-553.137.1.el8_10, kernel-abi-stablelists-4.18.0-553.137.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.137.1.el8_10
  • RHSA-2026:27812 Released 2026-06-22 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.137.1.rt7.478.el8_10, kernel-rt-core-4.18.0-553.137.1.rt7.478.el8_10, kernel-rt-debug-4.18.0-553.137.1.rt7.478.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.137.1.rt7.478.el8_10, kernel-rt-core-4.18.0-553.137.1.rt7.478.el8_10, kernel-rt-debug-4.18.0-553.137.1.rt7.478.el8_10 +7
  • RHSA-2026:25191 Released 2026-06-11 · Red Hat rating Critical
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.22.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.22.1.el10_2, kernel-64k-devel-6.12.0-211.22.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.22.1.el10_2, kernel-64k-6.12.0-211.22.1.el10_2, kernel-64k-core-6.12.0-211.22.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.22.1.el10_2, libperf-6.12.0-211.22.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.22.1.el10_2, kernel-rt-64k-6.12.0-211.22.1.el10_2, kernel-rt-64k-core-6.12.0-211.22.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.22.1.el10_2, kernel-rt-core-6.12.0-211.22.1.el10_2, kernel-rt-debug-6.12.0-211.22.1.el10_2 +9

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:52667
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:25191
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:30848
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:67723
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:51746
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:52764
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:52667
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:25191
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:27811
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:30848
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:59091
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:59473
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:52649
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:67723
Red Hat Enterprise Linux BaseOS E4S (v.9.4)Fixed RHSA-2026:51746
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:52764
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:52667
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:59091
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:59473
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:52649
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:27811
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:25191
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:30848
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:52764
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:27812
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:27812
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:25191
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:30848
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:67721
Red Hat Enterprise Linux Real Time E4S (v.9.4)Fixed RHSA-2026:51746
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:52764
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:52667
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:25191
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:30848
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:67721
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)Fixed RHSA-2026:51746
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:52764
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:52667
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46054
  2. 2026-10-03 Alias added: GHSA-xg2q-7399-f2r3
  3. 2026-10-16 CISA SSVC decision points changed
  4. 2026-10-19 Weakness changed · CISA ADP

References

Patch 2

Other 3

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences