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TI-2025-25430 Aliases CVE-2025-38089GHSA-r4mq-hvhp-3h35

sunrpc: handle SVC_GARBAGE during svc auth processing as auth error

Priority MEDIUM 50CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 15 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

In the Linux kernel, the following vulnerability has been resolved: sunrpc: handle SVC_GARBAGE during svc auth processing as auth error tianshuo han reported a remotely-triggerable crash if the client sends a kernel RPC server a specially crafted packet. If decoding the RPC reply fails in such a way that SVC_GARBAGE is returned without setting the rq_accept_statp pointer, then that pointer can be dereferenced and a value stored there. If it's the first time the thread has processed an RPC, then that pointer will be set to NULL and the kernel will crash. In other cases, it could create a memory scribble. The server sunrpc code treats a SVC_GARBAGE return from svc_authenticate or pg_authenticate as if it should send a GARBAGE_ARGS reply. RFC 5531 says that if authentication fails that the RPC should be rejected instead with a status of AUTH_ERR. Handle a SVC_GARBAGE return as an AUTH_ERROR, with a reason of AUTH_BADCRED instead of returning GARBAGE_ARGS in that case. This sidesteps the whole problem of touching the rpc_accept_statp pointer in this situation and avoids the crash.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0056 46th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Linux (Linux): 6.4, 6.6.95, 6.12.35 +2Red Hat: 5 advisoriesRed Hat: 15 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
LinuxLinux6.3.4 to before 6.46.4Patch availableCNA
LinuxLinux6.4 and later6.6.95, 6.12.35, 6.15.4, 6.16Patch availableCNA
  • Linux VendorLinux Affected 6.3.4 to before 6.4 Fixed in 6.4 Patch available CNA
  • Linux VendorLinux Affected 6.4 and later Fixed in 6.6.95, 6.12.35, 6.15.4, 6.16 Patch available CNA

CPE configurations NVD · 9

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*6.3.4 to before 6.4; 6.4.1 to before 6.6.95; 6.7 to before 6.12.35; 6.13 to before 6.15.4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.4:-:*:*:*:*:*:*6.4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.4:rc3:*:*:*:*:*:*6.4 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.4:rc4:*:*:*:*:*:*6.4 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.4:rc5:*:*:*:*:*:*6.4 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.4:rc6:*:*:*:*:*:*6.4 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.4:rc7:*:*:*:*:*:*6.4 rc7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*6.16 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*6.16 rc2VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.3.4 to before 6.4; 6.4.1 to before 6.6.95; 6.7 to before 6.12.35; 6.13 to before 6.15.4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.4:-:*:*:*:*:*:* Versions 6.4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.4:rc3:*:*:*:*:*:* Versions 6.4 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.4:rc4:*:*:*:*:*:* Versions 6.4 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.4:rc5:*:*:*:*:*:* Versions 6.4 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.4:rc6:*:*:*:*:*:* Versions 6.4 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.4:rc7:*:*:*:*:*:* Versions 6.4 rc7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:* Versions 6.16 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:* Versions 6.16 rc2 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.4
  • Fix · CNA Linux (Linux) Fixed in 6.6.95, 6.12.35, 6.15.4, 6.16

Red Hat 5 advisories

  • RHSA-2025:12976 Released 2025-08-05 · Red Hat rating Important
    kpatch-patch-5_14_0-570_17_1 security update
    • Red Hat Enterprise Linux BaseOS (v. 9) kpatch-patch-5_14_0-570_17_1-1-5.el9_6
  • RHSA-2025:12977 Released 2025-08-05 · 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, kpatch-patch-5_14_0-427_55_1, and kpatch-patch-5_14_0-427_68_2 security update
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) kpatch-patch-5_14_0-427_13_1-1-11.el9_4, kpatch-patch-5_14_0-427_31_1-1-9.el9_4, kpatch-patch-5_14_0-427_44_1-1-7.el9_4 +2
  • RHSA-2025:11810 Released 2025-07-28 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.79.1.el9_4, libperf-5.14.0-427.79.1.el9_4
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.79.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.79.1.el9_4, kernel-64k-devel-5.14.0-427.79.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.79.1.el9_4, kernel-5.14.0-427.79.1.el9_4, kernel-64k-5.14.0-427.79.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.79.1.el9_4, kernel-rt-core-5.14.0-427.79.1.el9_4, kernel-rt-debug-5.14.0-427.79.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.79.1.el9_4, kernel-rt-core-5.14.0-427.79.1.el9_4, kernel-rt-debug-5.14.0-427.79.1.el9_4 +11
Show 2 more Red Hat advisories
  • RHSA-2025:11428 Released 2025-07-21 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-55.22.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.22.1.el10_0, kernel-64k-devel-6.12.0-55.22.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-55.22.1.el10_0, kernel-64k-6.12.0-55.22.1.el10_0, kernel-64k-core-6.12.0-55.22.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-55.22.1.el10_0, libperf-6.12.0-55.22.1.el10_0
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-55.22.1.el10_0, kernel-rt-64k-6.12.0-55.22.1.el10_0, kernel-rt-64k-core-6.12.0-55.22.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-55.22.1.el10_0, kernel-rt-core-6.12.0-55.22.1.el10_0, kernel-rt-debug-6.12.0-55.22.1.el10_0 +11
  • RHSA-2025:11411 Released 2025-07-21 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-570.28.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.28.1.el9_6, kernel-64k-devel-5.14.0-570.28.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-570.28.1.el9_6, kernel-64k-5.14.0-570.28.1.el9_6, kernel-64k-core-5.14.0-570.28.1.el9_6 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-570.28.1.el9_6, libperf-5.14.0-570.28.1.el9_6
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-570.28.1.el9_6, kernel-rt-64k-5.14.0-570.28.1.el9_6, kernel-rt-64k-core-5.14.0-570.28.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-570.28.1.el9_6, kernel-rt-core-5.14.0-570.28.1.el9_6, kernel-rt-debug-5.14.0-570.28.1.el9_6 +11

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 CodeReady Linux Builder EUS (v.9.4)Fixed RHSA-2025:11810
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:11428
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:11411
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:11810
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2025:11428
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2025:11411, RHSA-2025:12976
Red Hat Enterprise Linux BaseOS EUS (v.9.4)Fixed RHSA-2025:11810, RHSA-2025:12977
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2025:11428
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2025:11411
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2025:11428
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2025:11411
Red Hat Enterprise Linux Real Time EUS (v.9.4)Fixed RHSA-2025:11810
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2025:11428
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2025:11411
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)Fixed RHSA-2025:11810
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-38089
  2. 2026-10-03 Alias added: GHSA-r4mq-hvhp-3h35
  3. 2026-10-16 CISA SSVC decision points changed
  4. 2026-10-29 Affected versions changed · Red Hat
  5. 2026-10-31 Affected versions changed · Red Hat

References

Exploit 1

Patch 4

Other 1

  • 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