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TI-2026-68059 Aliases CVE-2026-98168GHSA-p97w-7qmq-228w

Linux kernel SMB client out-of-bounds read in cifs_query_reparse_point()

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

The Linux kernel SMB client is affected in versions from 6.6.94 before 6.6.160, from 6.12.34 before 6.12.112, from 6.15.3 before 6.16, and from 6.16 until the fixes in 6.18.54, 7.2.8 and 7.3. The cifs_query_reparse_point() function checks only that the start pointer lies within the server response, not that enough space remains for the 8-byte reparse data header. A server can send a DataOffset that leaves less than 8 bytes, so reads of ReparseTag and ReparseDataLength go out of bounds.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix reparse buffer bounds in cifs_query_reparse_point() In cifs_query_reparse_point(), the start >= end check before casting to struct reparse_data_buffer * only ensures the start pointer is within the response. It fails to verify that there is enough space remaining for the fixed 8-byte header of the structure. If a server provides a DataOffset that leaves less than 8 bytes remaining, the check passes, but subsequent reads of ReparseTag and ReparseDataLength will occur out-of-bounds. Fix this by ensuring the remaining space is at least the size of the reparse_data_buffer structure before accessing its fields.

Why it matters now

EPSS 0.00206 10th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.6.160, 6.12.112, 6.16 +3Red 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
LinuxLinux6.6.94 to before 6.6.160; 6.12.34 to before 6.12.112; 6.15.3 to before 6.166.6.160, 6.12.112, 6.16Patch availableCNA
LinuxLinux6.16 and later6.6.160, 6.12.112, 6.18.54, 7.2.8, 7.3Patch availableCNA
  • Linux VendorLinux Affected 6.6.94 to before 6.6.160; 6.12.34 to before 6.12.112; 6.15.3 to before 6.16 Fixed in 6.6.160, 6.12.112, 6.16 Patch available CNA
  • Linux VendorLinux Affected 6.16 and later Fixed in 6.6.160, 6.12.112, 6.18.54, 7.2.8, 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

Upgrade the Linux kernel to 6.6.160, 6.12.112, 6.16, 6.18.54, 7.2.8 or 7.3, depending on the release branch in use. Red Hat lists Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 and Red Hat OpenShift Container Platform 5 as affected with no fix available.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Linux (Linux) Fixed in 6.6.160, 6.12.112, 6.16
  • Fix · CNA Linux (Linux) Fixed in 6.6.160, 6.12.112, 6.18.54, 7.2.8, 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. 2026-10-06 Threatist record created from CVE-2026-98168
  2. 2026-10-06 Alias added: GHSA-p97w-7qmq-228w
  3. 2026-10-07 Affected versions changed · Red Hat
  4. 2026-10-07 CVSS score added · Red Hat
  5. 2026-10-19 Fix available: Linux/[email protected] · CNA
  6. 2026-10-21 Fix available: Linux/[email protected], Linux/Linux@aa00eead258e4fe8158a3a3e2d65facf06274abd · CNA
  7. 2026-10-21 1 new reference · CNA
  8. 2026-11-06 Affected versions changed · Red Hat

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