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TI-2026-52528 Aliases CVE-2026-74746GHSA-4hwc-233g-5mv3

netfilter: flowtable: publish GC-visible tuple last

Priority MEDIUM 50Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 40 fixed, 1 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: netfilter: flowtable: publish GC-visible tuple last nf_flow_table_iterate() only treats original-direction tuple nodes as owning entries. Publishing the original node first lets GC observe and free a flow while flow_offload_add() is still inserting the reply node. Publish the reply node first and the original node last so GC never sees a partially installed flow. KASAN can trigger slab-use-after-free read and write reports in the flowtable/rhashtable path (rht_deferred_worker, jhash, flow_offload_del, flow_offload_lookup, etc.).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00536 45th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.266, 5.15.217, 6.1.184 +5Red Hat: 12 advisoriesRed Hat: 40 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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
LinuxLinux4.16 and later5.10.266, 5.15.217, 6.1.184, 6.6.153, 6.12.105, 6.18.46, 7.1.10, 7.2Patch availableCNA
  • Linux VendorLinux Affected 4.16 and later Fixed in 5.10.266, 5.15.217, 6.1.184, 6.6.153, 6.12.105, 6.18.46, 7.1.10, 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 5.10.266, 5.15.217, 6.1.184, 6.6.153, 6.12.105, 6.18.46, 7.1.10, 7.2

Red Hat 12 advisories

  • RHSA-2026:76739 Released 2026-10-08 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.55.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.55.1.el9_8, kernel-64k-devel-5.14.0-687.55.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.55.1.el9_8, kernel-64k-5.14.0-687.55.1.el9_8, kernel-64k-core-5.14.0-687.55.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.55.1.el9_8, libperf-5.14.0-687.55.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.55.1.el9_8, kernel-rt-64k-5.14.0-687.55.1.el9_8, kernel-rt-64k-core-5.14.0-687.55.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.55.1.el9_8, kernel-rt-core-5.14.0-687.55.1.el9_8, kernel-rt-debug-5.14.0-687.55.1.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-2026:77301 Released 2026-10-07 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.172.1.el8_8, kernel-4.18.0-477.172.1.el8_8, kernel-abi-stablelists-4.18.0-477.172.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.172.1.el8_8, kernel-4.18.0-477.172.1.el8_8, kernel-abi-stablelists-4.18.0-477.172.1.el8_8 +14
Show 9 more Red Hat advisories
  • RHSA-2026:77215 Released 2026-10-07 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.195.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.195.1.el9_2, kernel-64k-devel-5.14.0-284.195.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.195.1.el9_2, kernel-5.14.0-284.195.1.el9_2, kernel-64k-5.14.0-284.195.1.el9_2 +29
  • RHSA-2026:77217 Released 2026-10-07 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.211.1.el8_4, kernel-4.18.0-305.211.1.el8_4, kernel-abi-stablelists-4.18.0-305.211.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.211.1.el8_4, kernel-4.18.0-305.211.1.el8_4, kernel-abi-stablelists-4.18.0-305.211.1.el8_4 +19
  • RHSA-2026:77216 Released 2026-10-07 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.220.1.el8_6, kernel-4.18.0-372.220.1.el8_6, kernel-abi-stablelists-4.18.0-372.220.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.220.1.el8_6, kernel-4.18.0-372.220.1.el8_6, kernel-abi-stablelists-4.18.0-372.220.1.el8_6 +19
  • RHSA-2026:77214 Released 2026-10-07 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-core-5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-5.14.0-284.195.1.rt14.480.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-core-5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-5.14.0-284.195.1.rt14.480.el9_2 +11
  • 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
  • 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
  • RHSA-2026:75560 Released 2026-10-05 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.108.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.108.1.el10_0, kernel-64k-devel-6.12.0-55.108.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.108.1.el10_0, kernel-64k-6.12.0-55.108.1.el10_0, kernel-64k-core-6.12.0-55.108.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.108.1.el10_0, libperf-6.12.0-55.108.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.108.1.el10_0, kernel-rt-64k-6.12.0-55.108.1.el10_0, kernel-rt-64k-core-6.12.0-55.108.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.108.1.el10_0, kernel-rt-core-6.12.0-55.108.1.el10_0, kernel-rt-debug-6.12.0-55.108.1.el10_0 +11
  • RHSA-2026:74174 Released 2026-10-01 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.146.1.el9_6, libperf-5.14.0-570.146.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.146.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.146.1.el9_6, kernel-64k-devel-5.14.0-570.146.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.146.1.el9_6, kernel-64k-5.14.0-570.146.1.el9_6, kernel-64k-core-5.14.0-570.146.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.146.1.el9_6, kernel-rt-64k-5.14.0-570.146.1.el9_6, kernel-rt-64k-core-5.14.0-570.146.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.146.1.el9_6, kernel-rt-core-5.14.0-570.146.1.el9_6, kernel-rt-debug-5.14.0-570.146.1.el9_6 +11
  • RHSA-2026:73645 Released 2026-09-30 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) kernel-64k-debug-devel-5.14.0-427.153.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.153.1.el9_4, kernel-64k-devel-5.14.0-427.153.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool-7.3.0-427.153.1.el9_4, kernel-5.14.0-427.153.1.el9_4, kernel-64k-5.14.0-427.153.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt-5.14.0-427.153.1.el9_4, kernel-rt-core-5.14.0-427.153.1.el9_4, kernel-rt-debug-5.14.0-427.153.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt-5.14.0-427.153.1.el9_4, kernel-rt-core-5.14.0-427.153.1.el9_4, kernel-rt-debug-5.14.0-427.153.1.el9_4 +11

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
10Base-SMTVFixed RHSA-2026:76738
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:74174
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:76738
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:76739
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:77215
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:73645
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:75560
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:74174
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-2026:76739
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:77217
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:77216
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:77301
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:77215
Red Hat Enterprise Linux BaseOS E4S (v.9.4)Fixed RHSA-2026:73645
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:75560
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:74174
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:77217
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:77216
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:77301
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-2026:76739
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:75560
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-2026:76739
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:77214
Red Hat Enterprise Linux Real Time E4S (v.9.4)Fixed RHSA-2026:73645
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:75560
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:74174
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-2026:76739
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:77214
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)Fixed RHSA-2026:73645
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:75560
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:74174
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-74746
  2. 2026-10-03 Alias added: GHSA-4hwc-233g-5mv3
  3. 2026-10-05 Fix available: RHSA-2026:75746 · Red Hat
  4. 2026-10-05 Fix available: RHSA-2026:75560 · Red Hat
  5. 2026-10-05 Fix available: RHSA-2026:75747 · Red Hat
  6. 2026-10-05 Fix available: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux BaseOS EUS (v. 10.0) +6 · Red Hat
  7. 2026-10-07 Fix available: RHSA-2026:77214 · Red Hat
  8. 2026-10-07 Fix available: RHSA-2026:77216 · Red Hat
  9. 2026-10-07 Fix available: RHSA-2026:77215 · Red Hat
  10. 2026-10-07 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS AUS (v.8.6), Red Hat Enterprise Linux BaseOS E4S (v.8.8) +5 · Red Hat
  11. 2026-10-07 Fix available: RHSA-2026:77301 · Red Hat
  12. 2026-10-07 Fix available: RHSA-2026:77217 · Red Hat
  13. 2026-10-07 Fix available: Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) · Red Hat
  14. 2026-10-09 Fix available: RHSA-2026:76739 · Red Hat
  15. 2026-10-09 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
  16. 2026-10-18 CISA SSVC decision points changed
  17. 2026-10-26 Fix available: RHSA-2026:76738 · Red Hat
  18. 2026-10-26 Fix available: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) +4 · Red Hat

References

Other 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-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