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TI-2026-31304 Aliases CVE-2026-43125GHSA-fr2c-799q-pg3x

dlm: validate length in dlm_search_rsb_tree

Priority MEDIUM 50CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 31 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: dlm: validate length in dlm_search_rsb_tree The len parameter in dlm_dump_rsb_name() is not validated and comes from network messages. When it exceeds DLM_RESNAME_MAXLEN, it can cause out-of-bounds write in dlm_search_rsb_tree(). Add length validation to prevent potential buffer overflow.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00538 45th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.15.224, 6.1.191, 6.6.160 +4Red Hat: 18 advisoriesRed Hat: 31 fixed, 2 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
LinuxLinux3.4 and later5.15.224, 6.1.191, 6.6.160, 6.12.75, 6.18.16, 6.19.6, 7.0Patch availableCNA
  • Linux VendorLinux Affected 3.4 and later Fixed in 5.15.224, 6.1.191, 6.6.160, 6.12.75, 6.18.16, 6.19.6, 7.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*3.4 to before 6.12.75; 6.13 to before 6.18.16; 6.19 to before 6.19.6VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.4 to before 6.12.75; 6.13 to before 6.18.16; 6.19 to before 6.19.6 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.15.224, 6.1.191, 6.6.160, 6.12.75, 6.18.16, 6.19.6, 7.0

Red Hat 18 advisories

  • RHSA-2026:59091 Released 2026-08-24 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.201.1.el8_4, kernel-4.18.0-305.201.1.el8_4, kernel-abi-stablelists-4.18.0-305.201.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.201.1.el8_4, kernel-4.18.0-305.201.1.el8_4, kernel-abi-stablelists-4.18.0-305.201.1.el8_4 +14
  • RHSA-2026:55761 Released 2026-08-19 · 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_97_1 security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) kpatch-patch-4_18_0-477_107_1-1-12.el8_8, kpatch-patch-4_18_0-477_120_1-1-11.el8_8, kpatch-patch-4_18_0-477_130_1-1-9.el8_8 +2
  • RHSA-2026:56225 Released 2026-08-18 · Red Hat rating Important
    kpatch-patch-5_14_0-570_116_1, kpatch-patch-5_14_0-570_17_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_1-1-7.el9_6, kpatch-patch-5_14_0-570_17_1-1-22.el9_6, kpatch-patch-5_14_0-570_39_1-1-13.el9_6 +2
Show 15 more Red Hat advisories
  • RHSA-2026:56224 Released 2026-08-18 · 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_68_2, 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_1-1-12.el9_4, kpatch-patch-5_14_0-427_113_1-1-10.el9_4, kpatch-patch-5_14_0-427_126_1-1-7.el9_4 +2
  • RHSA-2026:55837 Released 2026-08-17 · Red Hat rating Important
    kpatch-patch-5_14_0-284_117_1, kpatch-patch-5_14_0-284_134_1, kpatch-patch-5_14_0-284_148_1, kpatch-patch-5_14_0-284_158_1, and kpatch-patch-5_14_0-284_172_1 security update
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) kpatch-patch-5_14_0-284_117_1-1-19.el9_2, kpatch-patch-5_14_0-284_134_1-1-13.el9_2, kpatch-patch-5_14_0-284_148_1-1-11.el9_2 +2
  • RHSA-2026:55763 Released 2026-08-17 · 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_1-1-6.el9_8
  • RHSA-2026:55762 Released 2026-08-17 · 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_53_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_1-1-9.el8_10, kpatch-patch-4_18_0-553_125_1-1-6.el8_10, kpatch-patch-4_18_0-553_53_1-1-16.el8_10 +2
  • RHSA-2026:41236 Released 2026-07-17 · Red Hat rating Critical
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt-3.10.0-1160.155.1.rt56.1307.el7, kernel-rt-debug-3.10.0-1160.155.1.rt56.1307.el7, kernel-rt-debug-devel-3.10.0-1160.155.1.rt56.1307.el7 +4
  • RHSA-2026:36767 Released 2026-07-08 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) kernel-64k-debug-devel-5.14.0-427.136.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.136.1.el9_4, kernel-64k-devel-5.14.0-427.136.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool-7.3.0-427.136.1.el9_4, kernel-5.14.0-427.136.1.el9_4, kernel-64k-5.14.0-427.136.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt-5.14.0-427.136.1.el9_4, kernel-rt-core-5.14.0-427.136.1.el9_4, kernel-rt-debug-5.14.0-427.136.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt-5.14.0-427.136.1.el9_4, kernel-rt-core-5.14.0-427.136.1.el9_4, kernel-rt-debug-5.14.0-427.136.1.el9_4 +11
  • RHSA-2026:35863 Released 2026-07-06 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.150.1.el8_8, kernel-4.18.0-477.150.1.el8_8, kernel-abi-stablelists-4.18.0-477.150.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.150.1.el8_8, kernel-4.18.0-477.150.1.el8_8, kernel-abi-stablelists-4.18.0-477.150.1.el8_8 +14
  • RHSA-2026:35844 Released 2026-07-06 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) bpftool-3.10.0-1160.154.1.el7, kernel-3.10.0-1160.154.1.el7, kernel-abi-whitelists-3.10.0-1160.154.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debug-devel-3.10.0-1160.154.1.el7, kernel-tools-libs-devel-3.10.0-1160.154.1.el7
  • RHSA-2026:34094 Released 2026-07-01 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.125.1.el9_6, libperf-5.14.0-570.125.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.125.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.125.1.el9_6, kernel-64k-devel-5.14.0-570.125.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.125.1.el9_6, kernel-64k-5.14.0-570.125.1.el9_6, kernel-64k-core-5.14.0-570.125.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.125.1.el9_6, kernel-rt-64k-5.14.0-570.125.1.el9_6, kernel-rt-64k-core-5.14.0-570.125.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.125.1.el9_6, kernel-rt-core-5.14.0-570.125.1.el9_6, kernel-rt-debug-5.14.0-570.125.1.el9_6 +11
  • RHSA-2026:34095 Released 2026-07-01 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.178.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.178.1.el9_2, kernel-64k-devel-5.14.0-284.178.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.178.1.el9_2, kernel-5.14.0-284.178.1.el9_2, kernel-64k-5.14.0-284.178.1.el9_2 +29
  • RHSA-2026:33899 Released 2026-07-01 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.198.1.el8_6, kernel-4.18.0-372.198.1.el8_6, kernel-abi-stablelists-4.18.0-372.198.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.198.1.el8_6, kernel-4.18.0-372.198.1.el8_6, kernel-abi-stablelists-4.18.0-372.198.1.el8_6 +14
  • RHSA-2026:33900 Released 2026-07-01 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-core-5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-debug-5.14.0-284.178.1.rt14.463.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-core-5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-debug-5.14.0-284.178.1.rt14.463.el9_2 +11
  • RHSA-2026:25217 Released 2026-06-11 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.15.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.15.1.el9_8, kernel-64k-devel-5.14.0-687.15.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.15.1.el9_8, kernel-64k-5.14.0-687.15.1.el9_8, kernel-64k-core-5.14.0-687.15.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.15.1.el9_8, libperf-5.14.0-687.15.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.15.1.el9_8, kernel-rt-64k-5.14.0-687.15.1.el9_8, kernel-rt-64k-core-5.14.0-687.15.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.15.1.el9_8, kernel-rt-core-5.14.0-687.15.1.el9_8, kernel-rt-debug-5.14.0-687.15.1.el9_8 +9
  • RHSA-2026:25121 Released 2026-06-10 · Red Hat rating Critical
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.132.1.el8_10, kernel-4.18.0-553.132.1.el8_10, kernel-abi-stablelists-4.18.0-553.132.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.132.1.el8_10
  • RHSA-2026:25120 Released 2026-06-10 · Red Hat rating Critical
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-core-4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-debug-4.18.0-553.132.1.rt7.473.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-core-4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-debug-4.18.0-553.132.1.rt7.473.el8_10 +7

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6Affected—
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:34094
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:25217
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:34095
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:36767
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:34094
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:25121, RHSA-2026:55762
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:25217, RHSA-2026:55763
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:59091
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:33899
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:35863, RHSA-2026:55761
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:34095, RHSA-2026:55837
Red Hat Enterprise Linux BaseOS E4S (v.9.4)Fixed RHSA-2026:36767, RHSA-2026:56224
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:34094, RHSA-2026:56225
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:59091
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:33899
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:35863
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:25121
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:25217
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:25120
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:25120
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:25217
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:33900
Red Hat Enterprise Linux Real Time E4S (v.9.4)Fixed RHSA-2026:36767
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:34094
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:25217
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:33900
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)Fixed RHSA-2026:36767
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:34094
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2026:35844
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2026:35844
Red Hat Enterprise Linux for Real Time (v. 7 ELS)Fixed RHSA-2026:41236
Not affected: 1 product
  • Red Hat Enterprise Linux 10

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-43125
  2. 2026-10-03 Alias added: GHSA-fr2c-799q-pg3x
  3. 2026-10-16 CISA SSVC decision points changed
  4. 2026-10-19 Weakness changed · CISA ADP
  5. 2026-10-21 Fix available: Linux/Linux@2deafd015ea9a0e75ee5764e20eb1e16bd73efd8, Linux/[email protected] · CNA
  6. 2026-10-21 1 new reference · CNA
  7. 2026-10-30 Fix available: Linux/Linux@0270664871616eb3a5c864b9aa17be76fd35b920, Linux/[email protected], Linux/[email protected] +1 · CNA
  8. 2026-10-30 2 new references · CNA

References

Patch 4

Other 3

  • 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