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TI-2026-50523 Aliases CVE-2026-72243GHSA-m92q-543g-vq9x

selinux: check connect-related permissions on TCP Fast Open

Priority LOW 38Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 37 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: selinux: check connect-related permissions on TCP Fast Open Similar to Landlock, SELinux was not updated when TCP Fast Open support was introduced to ensure connect-related permissions are checked when using TCP Fast Open. Update its socket_sendmsg() hook to call selinux_socket_connect() when MSG_FASTOPEN is passed.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00166 5th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.178, 6.6.145, 6.12.97 +3Red Hat: 12 advisoriesRed Hat: 37 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
LinuxLinux3.6 and later6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2Patch availableCNA
  • Linux VendorLinux Affected 3.6 and later Fixed in 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*——Linux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2

Red Hat 12 advisories

  • RHSA-2026:95721 Released 2026-11-05 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt-3.10.0-1160.169.1.rt56.1321.el7, kernel-rt-debug-3.10.0-1160.169.1.rt56.1321.el7, kernel-rt-debug-devel-3.10.0-1160.169.1.rt56.1321.el7 +4
  • RHSA-2026:95556 Released 2026-11-05 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) bpftool-3.10.0-1160.169.1.el7, kernel-3.10.0-1160.169.1.el7, kernel-abi-whitelists-3.10.0-1160.169.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debug-devel-3.10.0-1160.169.1.el7, kernel-tools-libs-devel-3.10.0-1160.169.1.el7
  • RHSA-2026:93047 Released 2026-10-30 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.200.1.rt14.485.el9_2, kernel-rt-core-5.14.0-284.200.1.rt14.485.el9_2, kernel-rt-debug-5.14.0-284.200.1.rt14.485.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.200.1.rt14.485.el9_2, kernel-rt-core-5.14.0-284.200.1.rt14.485.el9_2, kernel-rt-debug-5.14.0-284.200.1.rt14.485.el9_2 +11
Show 9 more Red Hat advisories
  • RHSA-2026:92997 Released 2026-10-30 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.177.1.el8_8, kernel-4.18.0-477.177.1.el8_8, kernel-abi-stablelists-4.18.0-477.177.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.177.1.el8_8, kernel-4.18.0-477.177.1.el8_8, kernel-abi-stablelists-4.18.0-477.177.1.el8_8 +14
  • RHSA-2026:92993 Released 2026-10-30 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.200.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.200.1.el9_2, kernel-64k-devel-5.14.0-284.200.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.200.1.el9_2, kernel-5.14.0-284.200.1.el9_2, kernel-64k-5.14.0-284.200.1.el9_2 +29
  • RHSA-2026:91585 Released 2026-10-28 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.216.1.el8_4, kernel-4.18.0-305.216.1.el8_4, kernel-abi-stablelists-4.18.0-305.216.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.216.1.el8_4, kernel-4.18.0-305.216.1.el8_4, kernel-abi-stablelists-4.18.0-305.216.1.el8_4 +14
  • RHSA-2026:91492 Released 2026-10-28 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.152.1.el9_6, libperf-5.14.0-570.152.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.152.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.152.1.el9_6, kernel-64k-devel-5.14.0-570.152.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.152.1.el9_6, kernel-64k-5.14.0-570.152.1.el9_6, kernel-64k-core-5.14.0-570.152.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.152.1.el9_6, kernel-rt-64k-5.14.0-570.152.1.el9_6, kernel-rt-64k-core-5.14.0-570.152.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.152.1.el9_6, kernel-rt-core-5.14.0-570.152.1.el9_6, kernel-rt-debug-5.14.0-570.152.1.el9_6 +11
  • RHSA-2026:91489 Released 2026-10-28 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) kernel-64k-debug-devel-5.14.0-427.158.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.158.1.el9_4, kernel-64k-devel-5.14.0-427.158.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool-7.3.0-427.158.1.el9_4, kernel-5.14.0-427.158.1.el9_4, kernel-64k-5.14.0-427.158.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt-5.14.0-427.158.1.el9_4, kernel-rt-core-5.14.0-427.158.1.el9_4, kernel-rt-debug-5.14.0-427.158.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt-5.14.0-427.158.1.el9_4, kernel-rt-core-5.14.0-427.158.1.el9_4, kernel-rt-debug-5.14.0-427.158.1.el9_4 +11
  • RHSA-2026:91493 Released 2026-10-28 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.225.1.el8_6, kernel-4.18.0-372.225.1.el8_6, kernel-abi-stablelists-4.18.0-372.225.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.225.1.el8_6, kernel-4.18.0-372.225.1.el8_6, kernel-abi-stablelists-4.18.0-372.225.1.el8_6 +14
  • RHSA-2026:88687 Released 2026-10-23 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.113.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.113.1.el10_0, kernel-64k-devel-6.12.0-55.113.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.113.1.el10_0, kernel-64k-6.12.0-55.113.1.el10_0, kernel-64k-core-6.12.0-55.113.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.113.1.el10_0, libperf-6.12.0-55.113.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.113.1.el10_0, kernel-rt-64k-6.12.0-55.113.1.el10_0, kernel-rt-64k-core-6.12.0-55.113.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.113.1.el10_0, kernel-rt-core-6.12.0-55.113.1.el10_0, kernel-rt-debug-6.12.0-55.113.1.el10_0 +11
  • RHSA-2026:71233 Released 2026-09-24 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.59.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.59.1.el10_2, kernel-64k-devel-6.12.0-211.59.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.59.1.el10_2, kernel-64k-6.12.0-211.59.1.el10_2, kernel-64k-core-6.12.0-211.59.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.59.1.el10_2, libperf-6.12.0-211.59.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.59.1.el10_2, kernel-rt-64k-6.12.0-211.59.1.el10_2, kernel-rt-64k-core-6.12.0-211.59.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.59.1.el10_2, kernel-rt-core-6.12.0-211.59.1.el10_2, kernel-rt-debug-6.12.0-211.59.1.el10_2 +9
  • RHSA-2026:68570 Released 2026-09-17 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.49.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.49.1.el9_8, kernel-64k-devel-5.14.0-687.49.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.49.1.el9_8, kernel-64k-5.14.0-687.49.1.el9_8, kernel-64k-core-5.14.0-687.49.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.49.1.el9_8, libperf-5.14.0-687.49.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.49.1.el9_8, kernel-rt-64k-5.14.0-687.49.1.el9_8, kernel-rt-64k-core-5.14.0-687.49.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.49.1.el9_8, kernel-rt-core-5.14.0-687.49.1.el9_8, kernel-rt-debug-5.14.0-687.49.1.el9_8 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:91492
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:71233
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:68570
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:92993
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:91489
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:88687
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:91492
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:71233
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:68570
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:91585
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:91493
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:92997
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:92993
Red Hat Enterprise Linux BaseOS E4S (v.9.4)Fixed RHSA-2026:91489
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:88687
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:91492
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:91585
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:91493
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:92997
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:71233
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:68570
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:88687
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:71233
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:68570
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:93047
Red Hat Enterprise Linux Real Time E4S (v.9.4)Fixed RHSA-2026:91489
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:88687
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:91492
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:71233
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:68570
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:93047
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)Fixed RHSA-2026:91489
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:88687
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:91492
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2026:95556
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2026:95556
Red Hat Enterprise Linux for Real Time (v. 7 ELS)Fixed RHSA-2026:95721
Not affected: 1 product
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-72243
  2. 2026-10-03 Alias added: GHSA-m92q-543g-vq9x
  3. 2026-10-13 Affected versions changed · Red Hat
  4. 2026-10-16 CISA SSVC decision points changed
  5. 2026-10-24 Fix available: RHSA-2026:88687 · Red Hat
  6. 2026-10-24 Fix available: 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) +2 · Red Hat
  7. 2026-10-29 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS AUS (v.8.6) +5 · Red Hat
  8. 2026-10-29 Fix available: RHSA-2026:91585 · Red Hat
  9. 2026-10-29 Fix available: RHSA-2026:91493 · Red Hat
  10. 2026-10-29 Fix available: RHSA-2026:91489 · Red Hat
  11. 2026-10-30 Fix available: RHSA-2026:91492 · Red Hat
  12. 2026-10-30 Fix available: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux BaseOS EUS (v.9.6) +2 · Red Hat
  13. 2026-10-30 Fix available: RHSA-2026:93047 · Red Hat
  14. 2026-10-30 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS E4S (v.8.8), Red Hat Enterprise Linux BaseOS E4S (v.9.2) +3 · Red Hat
  15. 2026-10-31 Fix available: RHSA-2026:92993 · Red Hat
  16. 2026-10-31 Fix available: RHSA-2026:92997 · Red Hat
  17. 2026-11-05 Fix available: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS) · Red Hat
  18. 2026-11-06 Fix available: Red Hat Enterprise Linux for Real Time (v. 7 ELS) · Red Hat
  19. 2026-11-06 Fix available: RHSA-2026:95556 · Red Hat
  20. 2026-11-06 Fix available: RHSA-2026:95721 · Red Hat

References

Other 6

  • 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-2021-02452 Incorrect authorization in Ubuntu linux kernel 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
See all 21741 →

Sources

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