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TI-2026-62405 Aliases CVE-2026-92520GHSA-fc4c-4457-gw27

bpf: Zero queue and stack outputs on lock failure

Priority LOW 22Published · Updated

Key facts

Attack vector
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Privileges required
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User interaction
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Attack complexity
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Impact type
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Confidentiality · integrity · availability
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Fix status
Partial Red Hat: 4 without a fix

No CVSS vector from any source. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: Zero queue and stack outputs on lock failure Queue and stack pop/peek helpers accept an uninitialized output buffer because the verifier expects the helper to initialize it. The empty-map error path clears the buffer, but a failed lock acquisition returns -EBUSY without writing it. Clear the output before returning -EBUSY so BPF programs cannot observe uninitialized stack contents after a failed helper call.

Why it matters now

EPSS 0.00179 7th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.191, 5.5, 5.11 +7Red Hat: 4 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.1.56 to before 6.1.191; 5.4.258 to before 5.5; 5.10.198 to before 5.11; 5.15.134 to before 5.16; 6.5.6 to before 6.66.1.191, 5.5, 5.11, 5.16, 6.6Patch availableCNA
LinuxLinux6.6 and later6.1.191, 6.6.160, 6.12.114, 6.18.52, 7.2.6, 7.3Patch availableCNA
  • Linux VendorLinux Affected 6.1.56 to before 6.1.191; 5.4.258 to before 5.5; 5.10.198 to before 5.11; 5.15.134 to before 5.16; 6.5.6 to before 6.6 Fixed in 6.1.191, 5.5, 5.11, 5.16, 6.6 Patch available CNA
  • Linux VendorLinux Affected 6.6 and later Fixed in 6.1.191, 6.6.160, 6.12.114, 6.18.52, 7.2.6, 7.3 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 6.1.191, 5.5, 5.11, 5.16, 6.6
  • Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.160, 6.12.114, 6.18.52, 7.2.6, 7.3

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 5AffectedNo fix yet: Fix deferred
Not affected: 5 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift Container Platform 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-92520
  2. 2026-10-03 Alias added: GHSA-fc4c-4457-gw27
  3. 2026-10-19 Fix available: Linux/[email protected] · CNA
  4. 2026-10-20 Affected versions changed · Red Hat
  5. 2026-10-20 CVSS score added · Red Hat
  6. 2026-10-21 Fix available: Linux/Linux@23b4bcc79bab5285275912b94e98c286f281de75, Linux/[email protected], Linux/[email protected] +1 · CNA
  7. 2026-10-21 2 new references · CNA
  8. 2026-10-29 Affected versions changed · Red Hat
  9. 2026-10-30 Fix available: Linux/[email protected], Linux/Linux@6468e8ac026b44ae2a78114b80f9d1b9164d0f6c · CNA
  10. 2026-10-30 1 new reference · CNA
  11. 2026-11-01 Affected versions changed · Red Hat

References

Other 6

  • 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