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TI-2023-12875 Aliases CVE-2023-28327GHSA-gpc7-6g78-vfxw

NULL pointer dereference in Linux

Priority LOW 24CWE-476Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 5 fixed, 1 without a fix

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

Summary

A NULL pointer dereference flaw was found in the UNIX protocol in net/unix/diag.c In unix_diag_get_exact in the Linux Kernel. The newly allocated skb does not have sk, leading to a NULL pointer. This flaw allows a local user to crash or potentially cause a denial of service.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00189 8th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 5 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—LinuxLinux—No fix listedCNA
  • Linux Vendor— Affected Linux Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 6.0VulnerableLinux
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*8.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*9.0VulnerableRed Hat
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 6.0 Vulnerable ·Linux
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2023:5604 Released 2023-10-10 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-tools-libs-devel-5.14.0-70.75.1.el9_0
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) kernel-debug-devel-5.14.0-70.75.1.el9_0, kernel-debug-devel-matched-5.14.0-70.75.1.el9_0, kernel-devel-5.14.0-70.75.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS EUS (v.9.0) bpftool-5.14.0-70.75.1.el9_0, kernel-5.14.0-70.75.1.el9_0, kernel-abi-stablelists-5.14.0-70.75.1.el9_0 +14
  • RHSA-2023:5603 Released 2023-10-10 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time EUS (v.9.0) kernel-rt-5.14.0-70.75.1.rt21.146.el9_0, kernel-rt-core-5.14.0-70.75.1.rt21.146.el9_0, kernel-rt-debug-5.14.0-70.75.1.rt21.146.el9_0 +7
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) kernel-rt-5.14.0-70.75.1.rt21.146.el9_0, kernel-rt-core-5.14.0-70.75.1.rt21.146.el9_0, kernel-rt-debug-5.14.0-70.75.1.rt21.146.el9_0 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.0)Fixed RHSA-2023:5604
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2023:5604
Red Hat Enterprise Linux BaseOS EUS (v.9.0)Fixed RHSA-2023:5604
Red Hat Enterprise Linux Real Time EUS (v.9.0)Fixed RHSA-2023:5603
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)Fixed RHSA-2023:5603
Not affected: 6 products
  • Red Hat CodeReady Linux Builder EUS (v.9.0)
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux AppStream EUS (v.9.0)
  • Red Hat Enterprise Linux BaseOS EUS (v.9.0)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-28327
  2. 2026-10-03 Alias added: GHSA-gpc7-6g78-vfxw

References

Patch 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences