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TI-2026-52364 Aliases CVE-2026-74581GHSA-7ph7-58w3-w755

net: ipv6: clear suppressed fib6 rule result

Priority MEDIUM 49Published · 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: 39 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: net: ipv6: clear suppressed fib6 rule result fib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(), but leaves res->rt6 pointing at the released rt6_info. If no later rule supplies a replacement, fib6_rule_lookup() still sees res.rt6 and returns that stale dst to its caller. A suppressing rule can therefore leak a released route back to rt6_lookup(), and the next put hits rcuref_put_slowpath() from dst_release(). Clear res->rt6 when suppressing the route so suppressed lookups fall through to the null dst instead of reusing the released one.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00421 36th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.265, 5.15.216, 5.5 +6Red Hat: 21 advisoriesRed Hat: 39 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
LinuxLinux5.10.84 to before 5.10.265; 5.15.7 to before 5.15.216; 5.4.164 to before 5.55.10.265, 5.15.216, 5.5Patch availableCNA
LinuxLinux5.16 and later5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, 7.1.8, 7.2Patch availableCNA
  • Linux VendorLinux Affected 5.10.84 to before 5.10.265; 5.15.7 to before 5.15.216; 5.4.164 to before 5.5 Fixed in 5.10.265, 5.15.216, 5.5 Patch available CNA
  • Linux VendorLinux Affected 5.16 and later Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, 7.1.8, 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 5.10.265, 5.15.216, 5.5
  • Fix · CNA Linux (Linux) Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, 7.1.8, 7.2

Red Hat 21 advisories

  • RHSA-2026:72831 Released 2026-10-02 · Red Hat rating Important
    kpatch-patch-6_12_0-211_16_1 and kpatch-patch-6_12_0-211_49_1 security update
    • Red Hat Enterprise Linux BaseOS (v. 10) kpatch-patch-6_12_0-211_16_1-1-9.el10_2, kpatch-patch-6_12_0-211_49_1-1-1.el10_2
  • RHSA-2026:73788 Released 2026-09-30 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • NVIDIA for RHEL 10 kernel-6.12.0-259.27.el10nv, kernel-64k-6.12.0-259.27.el10nv, kernel-64k-core-6.12.0-259.27.el10nv +38
  • RHSA-2026:72830 Released 2026-09-29 · Red Hat rating Important
    kpatch-patch-5_14_0-570_116_1, kpatch-patch-5_14_0-570_135_1, kpatch-patch-5_14_0-570_39_1, kpatch-patch-5_14_0-570_66_1, and kpatch-patch-5_14_0-570_94_1 security update
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kpatch-patch-5_14_0-570_116_1-1-10.el9_6, kpatch-patch-5_14_0-570_135_1-1-1.el9_6, kpatch-patch-5_14_0-570_39_1-1-16.el9_6 +2
Show 18 more Red Hat advisories
  • RHSA-2026:72832 Released 2026-09-29 · Red Hat rating Important
    kpatch-patch-5_14_0-687_10_1 security update
    • Red Hat Enterprise Linux BaseOS (v. 9) kpatch-patch-5_14_0-687_10_1-1-9.el9_8
  • RHSA-2026:72629 Released 2026-09-28 · Red Hat rating Important
    kpatch-patch-4_18_0-553_109_1, kpatch-patch-4_18_0-553_125_1, kpatch-patch-4_18_0-553_158_1, kpatch-patch-4_18_0-553_72_1, and kpatch-patch-4_18_0-553_85_1 security update
    • Red Hat Enterprise Linux BaseOS (v. 8) kpatch-patch-4_18_0-553_109_1-1-12.el8_10, kpatch-patch-4_18_0-553_125_1-1-9.el8_10, kpatch-patch-4_18_0-553_158_1-1-1.el8_10 +2
  • RHSA-2026:72628 Released 2026-09-28 · Red Hat rating Important
    kpatch-patch-5_14_0-284_134_1, kpatch-patch-5_14_0-284_148_1, kpatch-patch-5_14_0-284_158_1, kpatch-patch-5_14_0-284_172_1, and kpatch-patch-5_14_0-284_188_1 security update
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) kpatch-patch-5_14_0-284_134_1-1-16.el9_2, kpatch-patch-5_14_0-284_148_1-1-14.el9_2, kpatch-patch-5_14_0-284_158_1-1-12.el9_2 +2
  • RHSA-2026:72630 Released 2026-09-28 · Red Hat rating Important
    kpatch-patch-5_14_0-427_100_1, kpatch-patch-5_14_0-427_113_1, kpatch-patch-5_14_0-427_126_1, kpatch-patch-5_14_0-427_146_1, and kpatch-patch-5_14_0-427_84_1 security update
    • Red Hat Enterprise Linux BaseOS E4S (v.9.4) kpatch-patch-5_14_0-427_100_1-1-15.el9_4, kpatch-patch-5_14_0-427_113_1-1-13.el9_4, kpatch-patch-5_14_0-427_126_1-1-10.el9_4 +2
  • RHSA-2026:72627 Released 2026-09-28 · Red Hat rating Important
    kpatch-patch-4_18_0-477_107_1, kpatch-patch-4_18_0-477_120_1, kpatch-patch-4_18_0-477_130_1, kpatch-patch-4_18_0-477_143_1, and kpatch-patch-4_18_0-477_161_1 security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) kpatch-patch-4_18_0-477_107_1-1-15.el8_8, kpatch-patch-4_18_0-477_120_1-1-14.el8_8, kpatch-patch-4_18_0-477_130_1-1-12.el8_8 +2
  • RHSA-2026:72059 Released 2026-09-25 · Red Hat rating Critical
    kernel security update
    • NVIDIA for RHEL 10 kernel-6.12.0-231.20.el10nv, kernel-64k-6.12.0-231.20.el10nv, kernel-64k-core-6.12.0-231.20.el10nv +38
  • RHSA-2026:63128 Released 2026-09-04 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.51.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.51.1.el10_2, kernel-64k-devel-6.12.0-211.51.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.51.1.el10_2, kernel-64k-6.12.0-211.51.1.el10_2, kernel-64k-core-6.12.0-211.51.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.51.1.el10_2, libperf-6.12.0-211.51.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.51.1.el10_2, kernel-rt-64k-6.12.0-211.51.1.el10_2, kernel-rt-64k-core-6.12.0-211.51.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.51.1.el10_2, kernel-rt-core-6.12.0-211.51.1.el10_2, kernel-rt-debug-6.12.0-211.51.1.el10_2 +9
  • RHSA-2026:63014 Released 2026-09-03 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.159.1.el8_10, kernel-4.18.0-553.159.1.el8_10, kernel-abi-stablelists-4.18.0-553.159.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.159.1.el8_10
  • RHSA-2026:63013 Released 2026-09-03 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.159.1.rt7.500.el8_10, kernel-rt-core-4.18.0-553.159.1.rt7.500.el8_10, kernel-rt-debug-4.18.0-553.159.1.rt7.500.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.159.1.rt7.500.el8_10, kernel-rt-core-4.18.0-553.159.1.rt7.500.el8_10, kernel-rt-debug-4.18.0-553.159.1.rt7.500.el8_10 +7
  • RHSA-2026:62609 Released 2026-09-02 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.102.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.102.1.el10_0, kernel-64k-devel-6.12.0-55.102.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.102.1.el10_0, kernel-64k-6.12.0-55.102.1.el10_0, kernel-64k-core-6.12.0-55.102.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.102.1.el10_0, libperf-6.12.0-55.102.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.102.1.el10_0, kernel-rt-64k-6.12.0-55.102.1.el10_0, kernel-rt-64k-core-6.12.0-55.102.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.102.1.el10_0, kernel-rt-core-6.12.0-55.102.1.el10_0, kernel-rt-debug-6.12.0-55.102.1.el10_0 +11
  • RHSA-2026:61932 Released 2026-09-01 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.163.1.el8_8, kernel-4.18.0-477.163.1.el8_8, kernel-abi-stablelists-4.18.0-477.163.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.163.1.el8_8, kernel-4.18.0-477.163.1.el8_8, kernel-abi-stablelists-4.18.0-477.163.1.el8_8 +14
  • RHSA-2026:60486 Released 2026-08-27 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.136.1.el9_6, libperf-5.14.0-570.136.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.136.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.136.1.el9_6, kernel-64k-devel-5.14.0-570.136.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.136.1.el9_6, kernel-64k-5.14.0-570.136.1.el9_6, kernel-64k-core-5.14.0-570.136.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.136.1.el9_6, kernel-rt-64k-5.14.0-570.136.1.el9_6, kernel-rt-64k-core-5.14.0-570.136.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.136.1.el9_6, kernel-rt-core-5.14.0-570.136.1.el9_6, kernel-rt-debug-5.14.0-570.136.1.el9_6 +11
  • RHSA-2026:60484 Released 2026-08-27 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) kernel-64k-debug-devel-5.14.0-427.147.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.147.1.el9_4, kernel-64k-devel-5.14.0-427.147.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool-7.3.0-427.147.1.el9_4, kernel-5.14.0-427.147.1.el9_4, kernel-64k-5.14.0-427.147.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt-5.14.0-427.147.1.el9_4, kernel-rt-core-5.14.0-427.147.1.el9_4, kernel-rt-debug-5.14.0-427.147.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt-5.14.0-427.147.1.el9_4, kernel-rt-core-5.14.0-427.147.1.el9_4, kernel-rt-debug-5.14.0-427.147.1.el9_4 +11
  • RHSA-2026:60485 Released 2026-08-27 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.209.1.el8_6, kernel-4.18.0-372.209.1.el8_6, kernel-abi-stablelists-4.18.0-372.209.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.209.1.el8_6, kernel-4.18.0-372.209.1.el8_6, kernel-abi-stablelists-4.18.0-372.209.1.el8_6 +14
  • RHSA-2026:60437 Released 2026-08-27 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.189.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.189.1.el9_2, kernel-64k-devel-5.14.0-284.189.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.189.1.el9_2, kernel-5.14.0-284.189.1.el9_2, kernel-64k-5.14.0-284.189.1.el9_2 +29
  • RHSA-2026:60438 Released 2026-08-27 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.189.1.rt14.474.el9_2, kernel-rt-core-5.14.0-284.189.1.rt14.474.el9_2, kernel-rt-debug-5.14.0-284.189.1.rt14.474.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.189.1.rt14.474.el9_2, kernel-rt-core-5.14.0-284.189.1.rt14.474.el9_2, kernel-rt-debug-5.14.0-284.189.1.rt14.474.el9_2 +11
  • RHSA-2026:59994 Released 2026-08-26 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.202.1.el8_4, kernel-4.18.0-305.202.1.el8_4, kernel-abi-stablelists-4.18.0-305.202.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.202.1.el8_4, kernel-4.18.0-305.202.1.el8_4, kernel-abi-stablelists-4.18.0-305.202.1.el8_4 +14
  • RHSA-2026:59723 Released 2026-08-26 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.42.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.42.1.el9_8, kernel-64k-devel-5.14.0-687.42.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.42.1.el9_8, kernel-64k-5.14.0-687.42.1.el9_8, kernel-64k-core-5.14.0-687.42.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.42.1.el9_8, libperf-5.14.0-687.42.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.42.1.el9_8, kernel-rt-64k-5.14.0-687.42.1.el9_8, kernel-rt-64k-core-5.14.0-687.42.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.42.1.el9_8, kernel-rt-core-5.14.0-687.42.1.el9_8, kernel-rt-debug-5.14.0-687.42.1.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 9AffectedNo fix yet
NVIDIA for RHEL 10Fixed RHSA-2026:72059, RHSA-2026:73788
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:60486
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:63128
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:59723
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:60437
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:60484
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:62609
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:60486
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:63128, RHSA-2026:72831
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:63014, RHSA-2026:72629
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:59723, RHSA-2026:72832
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:59994
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:60485
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:61932, RHSA-2026:72627
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:60437, RHSA-2026:72628
Red Hat Enterprise Linux BaseOS E4S (v.9.4)Fixed RHSA-2026:60484, RHSA-2026:72630
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:62609
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:60486, RHSA-2026:72830
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:59994
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:60485
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:61932
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:63014
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:63128
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:59723
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:62609
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:63013
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:63013
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:63128
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:59723
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:60438
Red Hat Enterprise Linux Real Time E4S (v.9.4)Fixed RHSA-2026:60484
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:62609
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:60486
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:63128
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:59723
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:60438
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)Fixed RHSA-2026:60484
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:62609
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:60486
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-74581
  2. 2026-10-03 Alias added: GHSA-7ph7-58w3-w755
  3. 2026-10-18 CISA SSVC decision points changed

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