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TI-2026-46098 Aliases CVE-2026-64534GHSA-6vg3-7hp6-mqc5

nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path

Priority MEDIUM 49CWE-667Published · 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: 25 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-667 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path In nvmet_tcp_try_recv_ddgst(), when a data digest mismatch is detected, nvmet_req_uninit() is called unconditionally. However, if the command arrived via the nvmet_tcp_handle_req_failure() path, nvmet_req_init() had returned false and percpu_ref_tryget_live() was never executed. The unconditional percpu_ref_put() inside nvmet_req_uninit() then causes a refcount underflow, leading to a WARNING in percpu_ref_switch_to_atomic_rcu, a use-after-free diagnostic, and eventually a permanent workqueue deadlock. Check cmd->flags & NVMET_TCP_F_INIT_FAILED before calling nvmet_req_uninit(), matching the existing pattern in nvmet_tcp_execute_request().

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00323 25th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.261, 5.12, 5.15.212 +5Red Hat: 8 advisoriesRed Hat: 25 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
LinuxLinux5.10.20 to before 5.10.261; 5.11.3 to before 5.125.10.261, 5.12Patch availableCNA
LinuxLinux5.12 and later5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1Patch availableCNA
  • Linux VendorLinux Affected 5.10.20 to before 5.10.261; 5.11.3 to before 5.12 Fixed in 5.10.261, 5.12 Patch available CNA
  • Linux VendorLinux Affected 5.12 and later Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1 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 5.10.261, 5.12
  • Fix · CNA Linux (Linux) Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1

Red Hat 8 advisories

  • RHSA-2026:94996 Released 2026-11-04 · Red Hat rating Critical
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.227.1.el8_6, kernel-4.18.0-372.227.1.el8_6, kernel-abi-stablelists-4.18.0-372.227.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.227.1.el8_6, kernel-4.18.0-372.227.1.el8_6, kernel-abi-stablelists-4.18.0-372.227.1.el8_6 +14
  • RHSA-2026:94558 Released 2026-11-03 · Red Hat rating Critical
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.202.1.rt14.487.el9_2, kernel-rt-core-5.14.0-284.202.1.rt14.487.el9_2, kernel-rt-debug-5.14.0-284.202.1.rt14.487.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.202.1.rt14.487.el9_2, kernel-rt-core-5.14.0-284.202.1.rt14.487.el9_2, kernel-rt-debug-5.14.0-284.202.1.rt14.487.el9_2 +11
  • RHSA-2026:94508 Released 2026-11-03 · Red Hat rating Critical
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.117.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.117.1.el10_0, kernel-64k-devel-6.12.0-55.117.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.117.1.el10_0, kernel-64k-6.12.0-55.117.1.el10_0, kernel-64k-core-6.12.0-55.117.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.117.1.el10_0, libperf-6.12.0-55.117.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.117.1.el10_0, kernel-rt-64k-6.12.0-55.117.1.el10_0, kernel-rt-64k-core-6.12.0-55.117.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.117.1.el10_0, kernel-rt-core-6.12.0-55.117.1.el10_0, kernel-rt-debug-6.12.0-55.117.1.el10_0 +11
Show 5 more Red Hat advisories
  • RHSA-2026:94477 Released 2026-11-03 · Red Hat rating Critical
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.202.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.202.1.el9_2, kernel-64k-devel-5.14.0-284.202.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.202.1.el9_2, kernel-5.14.0-284.202.1.el9_2, kernel-64k-5.14.0-284.202.1.el9_2 +29
  • RHSA-2026:71232 Released 2026-09-24 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.51.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.51.1.el9_8, kernel-64k-devel-5.14.0-687.51.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.51.1.el9_8, kernel-64k-5.14.0-687.51.1.el9_8, kernel-64k-core-5.14.0-687.51.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.51.1.el9_8, libperf-5.14.0-687.51.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.51.1.el9_8, kernel-rt-64k-5.14.0-687.51.1.el9_8, kernel-rt-64k-core-5.14.0-687.51.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.51.1.el9_8, kernel-rt-core-5.14.0-687.51.1.el9_8, kernel-rt-debug-5.14.0-687.51.1.el9_8 +9
  • RHSA-2026:70498 Released 2026-09-23 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.58.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.58.1.el10_2, kernel-64k-devel-6.12.0-211.58.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.58.1.el10_2, kernel-64k-6.12.0-211.58.1.el10_2, kernel-64k-core-6.12.0-211.58.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.58.1.el10_2, libperf-6.12.0-211.58.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.58.1.el10_2, kernel-rt-64k-6.12.0-211.58.1.el10_2, kernel-rt-64k-core-6.12.0-211.58.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.58.1.el10_2, kernel-rt-core-6.12.0-211.58.1.el10_2, kernel-rt-debug-6.12.0-211.58.1.el10_2 +9
  • RHSA-2026:70402 Released 2026-09-22 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.166.1.el8_10, kernel-4.18.0-553.166.1.el8_10, kernel-abi-stablelists-4.18.0-553.166.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.166.1.el8_10
  • RHSA-2026:70403 Released 2026-09-22 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.166.1.rt7.507.el8_10, kernel-rt-core-4.18.0-553.166.1.rt7.507.el8_10, kernel-rt-debug-4.18.0-553.166.1.rt7.507.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.166.1.rt7.507.el8_10, kernel-rt-core-4.18.0-553.166.1.rt7.507.el8_10, kernel-rt-debug-4.18.0-553.166.1.rt7.507.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 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:70498
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:71232
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:94477
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:94508
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:70498
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:70402
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:71232
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:94996
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:94477
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:94508
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:94996
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:70402
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:70498
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:71232
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:94508
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:70403
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:70403
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:70498
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:71232
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:94558
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:94508
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:70498
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:71232
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:94558
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:94508
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-64534
  2. 2026-10-03 Alias added: GHSA-6vg3-7hp6-mqc5
  3. 2026-10-16 CVSS score changed · Red Hat
  4. 2026-10-16 CISA SSVC decision points changed
  5. 2026-10-20 Weakness changed · CISA ADP
  6. 2026-11-03 Fix available: RHSA-2026:94477 · Red Hat
  7. 2026-11-03 Fix available: RHSA-2026:94508 · Red Hat
  8. 2026-11-03 Fix available: RHSA-2026:94558 · Red Hat
  9. 2026-11-03 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS E4S (v.9.2) +6 · Red Hat
  10. 2026-11-04 Fix available: RHSA-2026:94996 · Red Hat
  11. 2026-11-04 Fix available: Red Hat Enterprise Linux BaseOS AUS (v.8.6), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) · Red Hat

References

Other 7

  • 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