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TI-2025-26846 Aliases CVE-2025-40176GHSA-79rw-jwgh-qv55

tls: wait for pending async decryptions if tls_strp_msg_hold fails

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
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: tls: wait for pending async decryptions if tls_strp_msg_hold fails Async decryption calls tls_strp_msg_hold to create a clone of the input skb to hold references to the memory it uses. If we fail to allocate that clone, proceeding with async decryption can lead to various issues (UAF on the skb, writing into userspace memory after the recv() call has returned). In this case, wait for all pending decryption requests.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00487 42nd percentileScored 2026-11-07
Fix Fixed Linux (Linux): 6.1.158, 6.6.114, 6.12.55 +2Red Hat: 7 advisories

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
LinuxLinux6.0 and later6.1.158, 6.6.114, 6.12.55, 6.17.5, 6.18Patch availableCNA
  • Linux VendorLinux Affected 6.0 and later Fixed in 6.1.158, 6.6.114, 6.12.55, 6.17.5, 6.18 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 6.1.158, 6.6.114, 6.12.55, 6.17.5, 6.18

Red Hat 7 advisories

  • RHSA-2026:0747 Released 2026-01-19 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.54.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.54.1.el10_0, kernel-64k-devel-6.12.0-55.54.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.54.1.el10_0, kernel-64k-6.12.0-55.54.1.el10_0, kernel-64k-core-6.12.0-55.54.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.54.1.el10_0, libperf-6.12.0-55.54.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.54.1.el10_0, kernel-rt-64k-6.12.0-55.54.1.el10_0, kernel-rt-64k-core-6.12.0-55.54.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.54.1.el10_0, kernel-rt-core-6.12.0-55.54.1.el10_0, kernel-rt-debug-6.12.0-55.54.1.el10_0 +11
  • RHSA-2026:0535 Released 2026-01-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.152.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.152.1.el9_2, kernel-64k-devel-5.14.0-284.152.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.152.1.el9_2, kernel-5.14.0-284.152.1.el9_2, kernel-64k-5.14.0-284.152.1.el9_2 +29
  • RHSA-2026:0534 Released 2026-01-14 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-core-5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-debug-5.14.0-284.152.1.rt14.437.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-core-5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-debug-5.14.0-284.152.1.rt14.437.el9_2 +11
Show 4 more Red Hat advisories
  • RHSA-2026:0489 Released 2026-01-13 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.106.1.el9_4, libperf-5.14.0-427.106.1.el9_4
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.106.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.106.1.el9_4, kernel-64k-devel-5.14.0-427.106.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.106.1.el9_4, kernel-5.14.0-427.106.1.el9_4, kernel-64k-5.14.0-427.106.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.106.1.el9_4, kernel-rt-core-5.14.0-427.106.1.el9_4, kernel-rt-debug-5.14.0-427.106.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.106.1.el9_4, kernel-rt-core-5.14.0-427.106.1.el9_4, kernel-rt-debug-5.14.0-427.106.1.el9_4 +11
  • RHSA-2026:0457 Released 2026-01-12 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.77.1.el9_6, libperf-5.14.0-570.77.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.77.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.77.1.el9_6, kernel-64k-devel-5.14.0-570.77.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.77.1.el9_6, kernel-64k-5.14.0-570.77.1.el9_6, kernel-64k-core-5.14.0-570.77.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.77.1.el9_6, kernel-rt-64k-5.14.0-570.77.1.el9_6, kernel-rt-64k-core-5.14.0-570.77.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.77.1.el9_6, kernel-rt-core-5.14.0-570.77.1.el9_6, kernel-rt-debug-5.14.0-570.77.1.el9_6 +11
  • RHSA-2026:0453 Released 2026-01-12 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-124.27.1.el10_1, kernel-64k-debug-devel-matched-6.12.0-124.27.1.el10_1, kernel-64k-devel-6.12.0-124.27.1.el10_1 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-124.27.1.el10_1, kernel-64k-6.12.0-124.27.1.el10_1, kernel-64k-core-6.12.0-124.27.1.el10_1 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-124.27.1.el10_1, libperf-6.12.0-124.27.1.el10_1
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-124.27.1.el10_1, kernel-rt-64k-6.12.0-124.27.1.el10_1, kernel-rt-64k-core-6.12.0-124.27.1.el10_1 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-124.27.1.el10_1, kernel-rt-core-6.12.0-124.27.1.el10_1, kernel-rt-debug-6.12.0-124.27.1.el10_1 +9
  • RHSA-2025:23241 Released 2025-12-17 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-611.16.1.el9_7, kernel-64k-debug-devel-matched-5.14.0-611.16.1.el9_7, kernel-64k-devel-5.14.0-611.16.1.el9_7 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-611.16.1.el9_7, kernel-64k-5.14.0-611.16.1.el9_7, kernel-64k-core-5.14.0-611.16.1.el9_7 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-611.16.1.el9_7, libperf-5.14.0-611.16.1.el9_7
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-611.16.1.el9_7, kernel-rt-64k-5.14.0-611.16.1.el9_7, kernel-rt-64k-core-5.14.0-611.16.1.el9_7 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-611.16.1.el9_7, kernel-rt-core-5.14.0-611.16.1.el9_7, kernel-rt-debug-5.14.0-611.16.1.el9_7 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder EUS (v.9.4)Fixed RHSA-2026:0489
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:0457
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:0453
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:23241
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:0535
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:0747
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2026:0489
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:0457
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:0453
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2025:23241
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:0535
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:0747
Red Hat Enterprise Linux BaseOS EUS (v.9.4)Fixed RHSA-2026:0489
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:0457
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:0453
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2025:23241
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:0747
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:0453
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2025:23241
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:0534
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:0747
Red Hat Enterprise Linux Real Time EUS (v.9.4)Fixed RHSA-2026:0489
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:0457
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:0453
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2025:23241
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:0534
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:0747
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)Fixed RHSA-2026:0489
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:0457
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-2025-40176
  2. 2026-10-03 Alias added: GHSA-79rw-jwgh-qv55
  3. 2026-10-16 CISA SSVC decision points changed

References

Other 5

  • 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