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TI-2026-38356 Aliases CVE-2026-53270GHSA-r42m-j2mw-2qf9

ipvs: clear the svc scheduler ptr early on edit

Priority LOW 35CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 16 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: ipvs: clear the svc scheduler ptr early on edit ip_vs_edit_service() while unbinding the old scheduler clears the svc->scheduler ptr after the scheduler module initiates RCU callbacks. This can cause packets to use the old scheduler at the time when svc->sched_data is already freed after RCU grace period. Fix it by clearing the ptr early in ip_vs_unbind_scheduler(), before the done_service method schedules any RCU callbacks. Also, if the new scheduler fails to initialize when replacing the old scheduler, try to restore the old scheduler while still returning the error code.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00157 4th percentileScored 2026-11-07
Fix Partial Linux (Linux): 3.19, 4.2, 5.10.259 +7Red Hat: 4 advisoriesRed Hat: 16 fixed, 3 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
LinuxLinux3.18.23 to before 3.19; 4.1.11 to before 4.23.19, 4.2Patch availableCNA
LinuxLinux4.2 and later5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94, 6.18.36, 7.0.13, 7.1Patch availableCNA
  • Linux VendorLinux Affected 3.18.23 to before 3.19; 4.1.11 to before 4.2 Fixed in 3.19, 4.2 Patch available CNA
  • Linux VendorLinux Affected 4.2 and later Fixed in 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94, 6.18.36, 7.0.13, 7.1 Patch available CNA

CPE configurations NVD · 12

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*3.18.23 to before 3.19; 4.1.11 to before 4.2; 4.2.1 to before 5.10.259; 5.11 to before 5.15.210; 5.16 to before 6.1.176; 6.2 to before 6.6.143; 6.7 to before 6.12.94; 6.13 to before 6.18.36; 6.19 to before 7.0.13VulnerableLinux
cpe:2.3:o:linux:linux_kernel:4.2:-:*:*:*:*:*:*4.2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:4.2:rc5:*:*:*:*:*:*4.2 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:4.2:rc6:*:*:*:*:*:*4.2 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:4.2:rc7:*:*:*:*:*:*4.2 rc7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:4.2:rc8:*:*:*:*:*:*4.2 rc8VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*7.1 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*7.1 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*7.1 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*7.1 rc4VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.18.23 to before 3.19; 4.1.11 to before 4.2; 4.2.1 to before 5.10.259; 5.11 to before 5.15.210; 5.16 to before 6.1.176; 6.2 to before 6.6.143; 6.7 to before 6.12.94; 6.13 to before 6.18.36; 6.19 to before 7.0.13 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:4.2:-:*:*:*:*:*:* Versions 4.2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:4.2:rc5:*:*:*:*:*:* Versions 4.2 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:4.2:rc6:*:*:*:*:*:* Versions 4.2 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:4.2:rc7:*:*:*:*:*:* Versions 4.2 rc7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:4.2:rc8:*:*:*:*:*:* Versions 4.2 rc8 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* Versions 7.1 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* Versions 7.1 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* Versions 7.1 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* Versions 7.1 rc4 Vulnerable ·Linux
Show 2 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*7.1 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*7.1 rc6VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* Versions 7.1 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* Versions 7.1 rc6 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 3.19, 4.2
  • Fix · CNA Linux (Linux) Fixed in 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94, 6.18.36, 7.0.13, 7.1

Red Hat 4 advisories

  • RHSA-2026:93412 Released 2026-11-01 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.64.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.64.1.el9_8, kernel-64k-devel-5.14.0-687.64.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.64.1.el9_8, kernel-64k-5.14.0-687.64.1.el9_8, kernel-64k-core-5.14.0-687.64.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.64.1.el9_8, libperf-5.14.0-687.64.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.64.1.el9_8, kernel-rt-64k-5.14.0-687.64.1.el9_8, kernel-rt-64k-core-5.14.0-687.64.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.64.1.el9_8, kernel-rt-core-5.14.0-687.64.1.el9_8, kernel-rt-debug-5.14.0-687.64.1.el9_8 +9
  • RHSA-2026:76738 Released 2026-10-08 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • 10Base-SMTV kernel-modules-internal-6.12.0-211.63.1.el10_2
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.63.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.63.1.el10_2, kernel-64k-devel-6.12.0-211.63.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.63.1.el10_2, kernel-64k-6.12.0-211.63.1.el10_2, kernel-64k-core-6.12.0-211.63.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.63.1.el10_2, libperf-6.12.0-211.63.1.el10_2
    • Red Hat Enterprise Linux Hidden (v. 10) kernel-modules-internal-6.12.0-211.63.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.63.1.el10_2, kernel-rt-64k-6.12.0-211.63.1.el10_2, kernel-rt-64k-core-6.12.0-211.63.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.63.1.el10_2, kernel-rt-core-6.12.0-211.63.1.el10_2, kernel-rt-debug-6.12.0-211.63.1.el10_2 +9
  • RHSA-2026:75747 Released 2026-10-05 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.171.1.el8_10, kernel-4.18.0-553.171.1.el8_10, kernel-abi-stablelists-4.18.0-553.171.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.171.1.el8_10
Show 1 more Red Hat advisories
  • RHSA-2026:75746 Released 2026-10-05 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.171.1.rt7.512.el8_10, kernel-rt-core-4.18.0-553.171.1.rt7.512.el8_10, kernel-rt-debug-4.18.0-553.171.1.rt7.512.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.171.1.rt7.512.el8_10, kernel-rt-core-4.18.0-553.171.1.rt7.512.el8_10, kernel-rt-debug-4.18.0-553.171.1.rt7.512.el8_10 +7

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
10Base-SMTVFixed RHSA-2026:76738
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:76738
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:93412
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:76738
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:75747
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:93412
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:75747
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:76738
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:93412
Red Hat Enterprise Linux Hidden (v. 10)Fixed RHSA-2026:76738
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:75746
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:75746
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:76738
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:93412
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:76738
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:93412

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-53270
  2. 2026-10-03 Alias added: GHSA-r42m-j2mw-2qf9
  3. 2026-10-05 Fix available: RHSA-2026:75746 · Red Hat
  4. 2026-10-05 Fix available: RHSA-2026:75747 · Red Hat
  5. 2026-10-05 Fix available: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8), Red Hat Enterprise Linux NFV (v. 8) +1 · Red Hat
  6. 2026-10-16 CISA SSVC decision points changed
  7. 2026-10-19 Weakness changed · CISA ADP
  8. 2026-10-26 Fix available: RHSA-2026:76738 · Red Hat
  9. 2026-10-26 Fix available: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) +4 · Red Hat
  10. 2026-11-02 Fix available: RHSA-2026:93412 · Red Hat
  11. 2026-11-02 Fix available: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) +2 · Red Hat

References

Patch 8

  • 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

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