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TI-2026-24096 Aliases CVE-2026-31539GHSA-vm72-v475-frvx

smb: smbdirect: introduce smbdirect_socket.recv_io.credits.available

Priority LOW 39CWE-362Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

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: smb: smbdirect: introduce smbdirect_socket.recv_io.credits.available The logic off managing recv credits by counting posted recv_io and granted credits is racy. That's because the peer might already consumed a credit, but between receiving the incoming recv at the hardware and processing the completion in the 'recv_done' functions we likely have a window where we grant credits, which don't really exist. So we better have a decicated counter for the available credits, which will be incremented when we posted new recv buffers and drained when we grant the credits to the peer.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00329 26th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 6.18.11, 6.19.1, 7.0Red Hat: 2 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.18 and later6.18.11, 6.19.1, 7.0Patch availableCNA
  • Linux VendorLinux Affected 6.18 and later Fixed in 6.18.11, 6.19.1, 7.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*6.18 to before 6.18.11; 6.19 to before 6.19.1VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.18 to before 6.18.11; 6.19 to before 6.19.1 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.18.11, 6.19.1, 7.0

Red Hat 2 advisories

  • RHSA-2026:71700 Released 2026-09-25 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.52.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.52.1.el9_8, kernel-64k-devel-5.14.0-687.52.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.52.1.el9_8, kernel-64k-5.14.0-687.52.1.el9_8, kernel-64k-core-5.14.0-687.52.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.52.1.el9_8, libperf-5.14.0-687.52.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.52.1.el9_8, kernel-rt-64k-5.14.0-687.52.1.el9_8, kernel-rt-64k-core-5.14.0-687.52.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.52.1.el9_8, kernel-rt-core-5.14.0-687.52.1.el9_8, kernel-rt-debug-5.14.0-687.52.1.el9_8 +9
  • RHSA-2026:67471 Released 2026-09-15 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.55.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.55.1.el10_2, kernel-64k-devel-6.12.0-211.55.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.55.1.el10_2, kernel-64k-6.12.0-211.55.1.el10_2, kernel-64k-core-6.12.0-211.55.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.55.1.el10_2, libperf-6.12.0-211.55.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.55.1.el10_2, kernel-rt-64k-6.12.0-211.55.1.el10_2, kernel-rt-64k-core-6.12.0-211.55.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.55.1.el10_2, kernel-rt-core-6.12.0-211.55.1.el10_2, kernel-rt-debug-6.12.0-211.55.1.el10_2 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:67471
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:71700
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:67471
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:71700
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:67471
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:71700
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:67471
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:71700
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:67471
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:71700
Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-31539
  2. 2026-10-03 Alias added: GHSA-vm72-v475-frvx
  3. 2026-10-16 CISA SSVC decision points changed
  4. 2026-10-19 Weakness changed · CISA ADP
  5. 2026-10-29 Affected versions changed · Red Hat

References

Patch 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