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TI-2025-26378 Aliases CVE-2025-39702GHSA-37gv-w6h3-7hm7

ipv6: sr: Fix MAC comparison to be constant-time

Priority MEDIUM 49CWE-203Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 23 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-203.

Summary

In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time. Use the appropriate helper function for this.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00449 39th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.249, 5.15.190, 6.1.149 +4Red Hat: 9 advisoriesRed Hat: 23 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
LinuxLinux4.10 and later5.10.249, 5.15.190, 6.1.149, 6.6.103, 6.12.44, 6.16.4, 6.17Patch availableCNA
  • Linux VendorLinux Affected 4.10 and later Fixed in 5.10.249, 5.15.190, 6.1.149, 6.6.103, 6.12.44, 6.16.4, 6.17 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.10 to before 5.15.190; 5.16 to before 6.1.149; 6.2 to before 6.6.103; 6.7 to before 6.12.44; 6.13 to before 6.16.4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*6.17 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*6.17 rc2VulnerableLinux
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.10 to before 5.15.190; 5.16 to before 6.1.149; 6.2 to before 6.6.103; 6.7 to before 6.12.44; 6.13 to before 6.16.4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* Versions 6.17 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* Versions 6.17 rc2 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.10.249, 5.15.190, 6.1.149, 6.6.103, 6.12.44, 6.16.4, 6.17

Red Hat 9 advisories

  • RHSA-2025:22124 Released 2025-11-25 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.148.1.rt14.433.el9_2, kernel-rt-core-5.14.0-284.148.1.rt14.433.el9_2, kernel-rt-debug-5.14.0-284.148.1.rt14.433.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.148.1.rt14.433.el9_2, kernel-rt-core-5.14.0-284.148.1.rt14.433.el9_2, kernel-rt-debug-5.14.0-284.148.1.rt14.433.el9_2 +11
  • RHSA-2025:22095 Released 2025-11-25 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.148.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.148.1.el9_2, kernel-64k-devel-5.14.0-284.148.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.148.1.el9_2, kernel-5.14.0-284.148.1.el9_2, kernel-64k-5.14.0-284.148.1.el9_2 +29
  • RHSA-2025:21760 Released 2025-11-19 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.100.1.el9_4, libperf-5.14.0-427.100.1.el9_4
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.100.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.100.1.el9_4, kernel-64k-devel-5.14.0-427.100.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.100.1.el9_4, kernel-5.14.0-427.100.1.el9_4, kernel-64k-5.14.0-427.100.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.100.1.el9_4, kernel-rt-core-5.14.0-427.100.1.el9_4, kernel-rt-debug-5.14.0-427.100.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.100.1.el9_4, kernel-rt-core-5.14.0-427.100.1.el9_4, kernel-rt-debug-5.14.0-427.100.1.el9_4 +11
Show 6 more Red Hat advisories
  • RHSA-2025:21136 Released 2025-11-12 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.153.1.rt21.225.el9_0, kernel-rt-core-5.14.0-70.153.1.rt21.225.el9_0, kernel-rt-debug-5.14.0-70.153.1.rt21.225.el9_0 +9
    • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.153.1.rt21.225.el9_0, kernel-rt-core-5.14.0-70.153.1.rt21.225.el9_0, kernel-rt-debug-5.14.0-70.153.1.rt21.225.el9_0 +7
  • RHSA-2025:21118 Released 2025-11-12 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-124.9.1.el10_1, kernel-64k-debug-devel-matched-6.12.0-124.9.1.el10_1, kernel-64k-devel-6.12.0-124.9.1.el10_1 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-124.9.1.el10_1, kernel-64k-6.12.0-124.9.1.el10_1, kernel-64k-core-6.12.0-124.9.1.el10_1 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-124.9.1.el10_1, libperf-6.12.0-124.9.1.el10_1
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-124.9.1.el10_1, kernel-rt-64k-6.12.0-124.9.1.el10_1, kernel-rt-64k-core-6.12.0-124.9.1.el10_1 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-124.9.1.el10_1, kernel-rt-core-6.12.0-124.9.1.el10_1, kernel-rt-debug-6.12.0-124.9.1.el10_1 +9
  • RHSA-2025:21112 Released 2025-11-12 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-611.7.1.el9_7, kernel-64k-debug-devel-matched-5.14.0-611.7.1.el9_7, kernel-64k-devel-5.14.0-611.7.1.el9_7 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-611.7.1.el9_7, kernel-64k-5.14.0-611.7.1.el9_7, kernel-64k-core-5.14.0-611.7.1.el9_7 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-611.7.1.el9_7, libperf-5.14.0-611.7.1.el9_7
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-611.7.1.el9_7, kernel-rt-64k-5.14.0-611.7.1.el9_7, kernel-rt-64k-core-5.14.0-611.7.1.el9_7 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-611.7.1.el9_7, kernel-rt-core-5.14.0-611.7.1.el9_7, kernel-rt-debug-5.14.0-611.7.1.el9_7 +9
  • RHSA-2025:21091 Released 2025-11-12 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.153.1.el9_0, kernel-debug-devel-matched-5.14.0-70.153.1.el9_0, kernel-devel-5.14.0-70.153.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.153.1.el9_0, kernel-5.14.0-70.153.1.el9_0, kernel-abi-stablelists-5.14.0-70.153.1.el9_0 +14
  • RHSA-2025:19469 Released 2025-11-03 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-55.42.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.42.1.el10_0, kernel-64k-devel-6.12.0-55.42.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-55.42.1.el10_0, kernel-64k-6.12.0-55.42.1.el10_0, kernel-64k-core-6.12.0-55.42.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-55.42.1.el10_0, libperf-6.12.0-55.42.1.el10_0
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-55.42.1.el10_0, kernel-rt-64k-6.12.0-55.42.1.el10_0, kernel-rt-64k-core-6.12.0-55.42.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-55.42.1.el10_0, kernel-rt-core-6.12.0-55.42.1.el10_0, kernel-rt-debug-6.12.0-55.42.1.el10_0 +11
  • RHSA-2025:19409 Released 2025-11-03 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-570.60.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.60.1.el9_6, kernel-64k-devel-5.14.0-570.60.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-570.60.1.el9_6, kernel-64k-5.14.0-570.60.1.el9_6, kernel-64k-core-5.14.0-570.60.1.el9_6 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-570.60.1.el9_6, libperf-5.14.0-570.60.1.el9_6
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-570.60.1.el9_6, kernel-rt-64k-5.14.0-570.60.1.el9_6, kernel-rt-64k-core-5.14.0-570.60.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-570.60.1.el9_6, kernel-rt-core-5.14.0-570.60.1.el9_6, kernel-rt-debug-5.14.0-570.60.1.el9_6 +11

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.4)Fixed RHSA-2025:21760
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:19469, RHSA-2025:21118
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:19409, RHSA-2025:21112
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:21091
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2025:22095
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:21760
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2025:19469, RHSA-2025:21118
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2025:19409, RHSA-2025:21112
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2025:21091
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2025:22095
Red Hat Enterprise Linux BaseOS EUS (v.9.4)Fixed RHSA-2025:21760
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2025:19469, RHSA-2025:21118
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2025:19409, RHSA-2025:21112
Red Hat Enterprise Linux NFV E4S (v.9.0)Fixed RHSA-2025:21136
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2025:19469, RHSA-2025:21118
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2025:19409, RHSA-2025:21112
Red Hat Enterprise Linux Real Time E4S (v.9.0)Fixed RHSA-2025:21136
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2025:22124
Red Hat Enterprise Linux Real Time EUS (v.9.4)Fixed RHSA-2025:21760
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2025:19469, RHSA-2025:21118
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2025:19409, RHSA-2025:21112
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2025:22124
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)Fixed RHSA-2025:21760
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-39702
  2. 2026-10-03 Alias added: GHSA-37gv-w6h3-7hm7
  3. 2026-10-16 CISA SSVC decision points changed

References

Patch 7

Advisory 1

  • 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