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TI-2025-15877 Aliases CVE-2025-21927GHSA-p4qc-cp8p-44wh

nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()

Priority MEDIUM 44CWE-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: 25 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: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu() nvme_tcp_recv_pdu() doesn't check the validity of the header length. When header digests are enabled, a target might send a packet with an invalid header length (e.g. 255), causing nvme_tcp_verify_hdgst() to access memory outside the allocated area and cause memory corruptions by overwriting it with the calculated digest. Fix this by rejecting packets with an unexpected header length.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00621 50th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.191, 6.6.160, 6.12.19 +2Red Hat: 12 advisoriesRed Hat: 25 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
LinuxLinux5.0 and later6.1.191, 6.6.160, 6.12.19, 6.13.7, 6.14Patch availableCNA
  • Linux VendorLinux Affected 5.0 and later Fixed in 6.1.191, 6.6.160, 6.12.19, 6.13.7, 6.14 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*5.0 to before 6.12.19; 6.13 to before 6.13.7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*6.14 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*6.14 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*6.14 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*6.14 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:*6.14 rc5VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.0 to before 6.12.19; 6.13 to before 6.13.7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:* Versions 6.14 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:* Versions 6.14 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:* Versions 6.14 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:* Versions 6.14 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:* Versions 6.14 rc5 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.160, 6.12.19, 6.13.7, 6.14

Red Hat 12 advisories

  • RHSA-2025:7501 Released 2025-05-13 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-55.11.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.11.1.el10_0, kernel-64k-devel-6.12.0-55.11.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-55.11.1.el10_0, kernel-64k-6.12.0-55.11.1.el10_0, kernel-64k-core-6.12.0-55.11.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-55.11.1.el10_0, libperf-6.12.0-55.11.1.el10_0
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-55.11.1.el10_0, kernel-rt-64k-6.12.0-55.11.1.el10_0, kernel-rt-64k-core-6.12.0-55.11.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-55.11.1.el10_0, kernel-rt-core-6.12.0-55.11.1.el10_0, kernel-rt-debug-6.12.0-55.11.1.el10_0 +11
  • RHSA-2025:7423 Released 2025-05-13 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-570.16.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.16.1.el9_6, kernel-64k-devel-5.14.0-570.16.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-570.16.1.el9_6, kernel-64k-5.14.0-570.16.1.el9_6, kernel-64k-core-5.14.0-570.16.1.el9_6 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-570.16.1.el9_6, libperf-5.14.0-570.16.1.el9_6
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-570.16.1.el9_6, kernel-rt-64k-5.14.0-570.16.1.el9_6, kernel-rt-64k-core-5.14.0-570.16.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-570.16.1.el9_6, kernel-rt-core-5.14.0-570.16.1.el9_6, kernel-rt-debug-5.14.0-570.16.1.el9_6 +11
  • RHSA-2025:4471 Released 2025-05-06 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.131.1.rt21.203.el9_0, kernel-rt-core-5.14.0-70.131.1.rt21.203.el9_0, kernel-rt-debug-5.14.0-70.131.1.rt21.203.el9_0 +9
    • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.131.1.rt21.203.el9_0, kernel-rt-core-5.14.0-70.131.1.rt21.203.el9_0, kernel-rt-debug-5.14.0-70.131.1.rt21.203.el9_0 +7
Show 9 more Red Hat advisories
  • RHSA-2025:4509 Released 2025-05-06 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.67.1.el9_4, libperf-5.14.0-427.67.1.el9_4
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.67.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.67.1.el9_4, kernel-64k-devel-5.14.0-427.67.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.67.1.el9_4, kernel-5.14.0-427.67.1.el9_4, kernel-64k-5.14.0-427.67.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.67.1.el9_4, kernel-rt-core-5.14.0-427.67.1.el9_4, kernel-rt-debug-5.14.0-427.67.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.67.1.el9_4, kernel-rt-core-5.14.0-427.67.1.el9_4, kernel-rt-debug-5.14.0-427.67.1.el9_4 +11
  • RHSA-2025:4499 Released 2025-05-06 · Red Hat rating Important
    kpatch-patch-5_14_0-503_15_1 and kpatch-patch-5_14_0-503_26_1 security update
    • Red Hat Enterprise Linux BaseOS (v. 9) kpatch-patch-5_14_0-503_15_1-1-4.el9_5, kpatch-patch-5_14_0-503_26_1-1-3.el9_5
  • RHSA-2025:4497 Released 2025-05-06 · Red Hat rating Important
    kpatch-patch-5_14_0-427_13_1, kpatch-patch-5_14_0-427_31_1, kpatch-patch-5_14_0-427_44_1, and kpatch-patch-5_14_0-427_55_1 security update
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) kpatch-patch-5_14_0-427_13_1-1-8.el9_4, kpatch-patch-5_14_0-427_31_1-1-6.el9_4, kpatch-patch-5_14_0-427_44_1-1-4.el9_4 +1
  • RHSA-2025:4496 Released 2025-05-06 · Red Hat rating Important
    kpatch-patch-5_14_0-284_104_1, kpatch-patch-5_14_0-284_52_1, kpatch-patch-5_14_0-284_79_1, and kpatch-patch-5_14_0-284_92_1 security update
    • Red Hat Enterprise Linux BaseOS EUS (v.9.2) kpatch-patch-5_14_0-284_104_1-1-2.el9_2, kpatch-patch-5_14_0-284_52_1-1-10.el9_2, kpatch-patch-5_14_0-284_79_1-1-6.el9_2 +1
  • RHSA-2025:4498 Released 2025-05-06 · Red Hat rating Important
    kpatch-patch-5_14_0-70_112_1, kpatch-patch-5_14_0-70_121_1, kpatch-patch-5_14_0-70_124_1, and kpatch-patch-5_14_0-70_85_1 security update
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kpatch-patch-5_14_0-70_112_1-1-6.el9_0, kpatch-patch-5_14_0-70_121_1-1-5.el9_0, kpatch-patch-5_14_0-70_124_1-1-3.el9_0 +1
  • RHSA-2025:4469 Released 2025-05-05 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.131.1.el9_0, kernel-debug-devel-matched-5.14.0-70.131.1.el9_0, kernel-devel-5.14.0-70.131.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.131.1.el9_0, kernel-5.14.0-70.131.1.el9_0, kernel-abi-stablelists-5.14.0-70.131.1.el9_0 +14
  • RHSA-2025:4340 Released 2025-04-30 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt-5.14.0-284.115.1.rt14.400.el9_2, kernel-rt-core-5.14.0-284.115.1.rt14.400.el9_2, kernel-rt-debug-5.14.0-284.115.1.rt14.400.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt-5.14.0-284.115.1.rt14.400.el9_2, kernel-rt-core-5.14.0-284.115.1.rt14.400.el9_2, kernel-rt-debug-5.14.0-284.115.1.rt14.400.el9_2 +11
  • RHSA-2025:4341 Released 2025-04-30 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-503.40.1.el9_5, libperf-5.14.0-503.40.1.el9_5
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-503.40.1.el9_5, kernel-64k-debug-devel-matched-5.14.0-503.40.1.el9_5, kernel-64k-devel-5.14.0-503.40.1.el9_5 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.4.0-503.40.1.el9_5, kernel-5.14.0-503.40.1.el9_5, kernel-64k-5.14.0-503.40.1.el9_5 +30
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-503.40.1.el9_5, kernel-rt-core-5.14.0-503.40.1.el9_5, kernel-rt-debug-5.14.0-503.40.1.el9_5 +9
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-503.40.1.el9_5, kernel-rt-core-5.14.0-503.40.1.el9_5, kernel-rt-debug-5.14.0-503.40.1.el9_5 +11
  • RHSA-2025:4339 Released 2025-04-30 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.115.1.el9_2
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.115.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.115.1.el9_2, kernel-64k-devel-5.14.0-284.115.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool-7.0.0-284.115.1.el9_2, kernel-5.14.0-284.115.1.el9_2, kernel-64k-5.14.0-284.115.1.el9_2 +29

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 8AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder (v. 9)Fixed RHSA-2025:4341
Red Hat CodeReady Linux Builder EUS (v.9.2)Fixed RHSA-2025:4339
Red Hat CodeReady Linux Builder EUS (v.9.4)Fixed RHSA-2025:4509
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:7501
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:4341, RHSA-2025:7423
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:4469
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2025:4339
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:4509
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2025:7501
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2025:4341, RHSA-2025:4499, RHSA-2025:7423
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2025:4469, RHSA-2025:4498
Red Hat Enterprise Linux BaseOS EUS (v.9.2)Fixed RHSA-2025:4339, RHSA-2025:4496
Red Hat Enterprise Linux BaseOS EUS (v.9.4)Fixed RHSA-2025:4497, RHSA-2025:4509
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2025:7501
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2025:7423
Red Hat Enterprise Linux NFV E4S (v.9.0)Fixed RHSA-2025:4471
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2025:7501
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2025:4341, RHSA-2025:7423
Red Hat Enterprise Linux Real Time E4S (v.9.0)Fixed RHSA-2025:4471
Red Hat Enterprise Linux Real Time EUS (v.9.2)Fixed RHSA-2025:4340
Red Hat Enterprise Linux Real Time EUS (v.9.4)Fixed RHSA-2025:4509
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2025:7501
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2025:4341, RHSA-2025:7423
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2)Fixed RHSA-2025:4340
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)Fixed RHSA-2025:4509
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-21927
  2. 2026-10-03 Alias added: GHSA-p4qc-cp8p-44wh
  3. 2026-10-21 Fix available: Linux/[email protected], Linux/Linux@9d22cf5cc94cd7dee84773ec41db78a46107dfa3 · CNA
  4. 2026-10-21 1 new reference · CNA
  5. 2026-10-30 Fix available: Linux/Linux@3b54109b2f771f74fd53b027429796326f84ab36, Linux/[email protected] · CNA
  6. 2026-10-30 1 new reference · CNA
  7. 2026-11-07 EPSS moved to the 50th–90th percentile

References

Patch 3

Other 2

  • 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