Intel

CVE-2026-53090

Linux kernel (GCP) vulnerabilities

highEPSS 0.1%

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix ld_{abs,ind} failure path analysis in subprogs Usage of ld_{abs,ind} instructions got extended into subprogs some time ago via commit 09b28d76eac4 ("bpf: Add abnormal return checks."). These are only allowed in subprograms when the latter are BTF annotated and have scalar return types. The code generator in bpf_gen_ld_abs() has an abnormal exit path (r0=0 + exit) from legacy cBPF times. While the enforcement is on scalar return types, the verifier must also simulate the path of abnormal exit if the packet data load via ld_{abs,ind} failed. This is currently not the case. Fix it by having the verifier simulate both success and failure paths, and extend it in similar ways as we do for tail calls. The success path (r0=unknown, continue to next insn) is pushed onto stack for later validation and the r0=0 and return to the caller is done on the fall-through side.

Source: UBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNUBUNTU_USNBSIBSI_CSAFDEBIAN_DSANVDCVEORGCVELISTV5

Metrics

Severity
high
Priority score
231.31
KEV status
—
Exploit maturity
no public PoC known
XIEM Effective CVSS
7.8
Source: nvd-v3
CVSS v3
7.8
CVSS v4
—
EPSS percentile
3.7 %
Low — this CVE sits in the lower 10% of all CVEs scored today.
EPSS score
0.1 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-09-07 09:05 UTC
CWE
—

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. CVE Modified2026-08-19 17:19 UTC· 416baaa9-dc9f-4396-8d5f-8c081fb06d67
    • Reference: https://git.kernel.org/stable/c/8a800497d9f6c2ec9c2c1ba7b71d0ac2ea7f7bbe
    • Reference: https://git.kernel.org/stable/c/928d354ae3557e8f755a227e67be88034eb3cd7f
    • Reference: https://git.kernel.org/stable/c/de1055e7f9e67af32b1f3376066272b04e5223c0
    • Affected: Linux, Linux → Linux, Linux
  2. Initial Analysis2026-07-23 18:35 UTC· nvd@nist.gov
    • CWE: NVD-CWE-noinfo
    • CPE Configuration: OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.10 up to (excluding) 7.0.10
    • Reference Type: kernel.org: https://git.kernel.org/stable/c/d846d83bdacbd8f14fc45c63b8c1d22608452e1c Types: Patch
    • Reference Type: kernel.org: https://git.kernel.org/stable/c/ee861486e377edc55361c08dcbceab3f6b6577bd Types: Patch
  3. CVE Modified2026-07-06 13:17 UTC· 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
    • CVSS V3.1: AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
    • CVSS V3.1: AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  4. New CVE Received2026-06-24 17:17 UTC· 416baaa9-dc9f-4396-8d5f-8c081fb06d67
    • Affected: Linux, Linux
    • Description: In the Linux kernel, the following vulnerability has been resolved: bpf: Fix ld_{abs,ind} failure path analysis in subprogs Usage of ld_{abs,ind} instructions got extended into subprogs some time ago via commit 09b28d76eac4 ("bpf: Add abnormal return checks."). These are only allowed in subprograms when the latter are BTF annotated and have scalar return types. The code generator in bpf_gen_ld_abs() has an abnormal exit path (r0=0 + exit) from legacy cBPF times. While the enforcement is on scalar return types, the verifier must also simulate the path of abnormal exit if the packet data load via ld_{abs,ind} failed. This is currently not the case. Fix it by having the verifier simulate both success and failure paths, and extend it in similar ways as we do for tail calls. The success path (r0=unknown, continue to next insn) is pushed onto stack for later validation and the r0=0 and return to the caller is done on the fall-through side.
    • Reference: https://git.kernel.org/stable/c/d846d83bdacbd8f14fc45c63b8c1d22608452e1c
    • Reference: https://git.kernel.org/stable/c/ee861486e377edc55361c08dcbceab3f6b6577bd

Affected operating systems

  • linux

    redhat / enterprise_linux10.0

  • linux

    redhat / enterprise_linux7.0

  • linux

    redhat / enterprise_linux8.0

  • linux

    redhat / enterprise_linux9.0

  • linux

    ubuntu / linux-aws-6.8jammy

  • linux

    ubuntu / linux-azureresolute

  • linux

    ubuntu / linux-azuretrusty

  • linux

    ubuntu / linux-azurexenial

  • linux

    ubuntu / linux-azure-4.15bionic

  • linux

    ubuntu / linux-azure-5.4bionic

  • linux

    ubuntu / linux-azure-fdenoble

  • linux

    ubuntu / linux-azure-fderesolute

  • linux

    ubuntu / linux-azure-fde-6.8jammy

  • linux

    ubuntu / linux-azure-fipsbionic

  • linux

    ubuntu / linux-azure-fipsfocal

  • linux

    ubuntu / linux-azure-fipsnoble

  • linux

    ubuntu / linux-fipsjammy

  • linux

    ubuntu / linux-gcp-7.0noble

  • linux

    ubuntu / linux-gkejammy

  • linux

    ubuntu / linux-nvidia-tegranoble

  • linux

    ubuntu / linux-raspinoble

  • linux

    ubuntu / linux-raspi-realtimenoble

  • linux

    linux / linux_kernel2.6.12

  • linux

    linux / linux_kernel2.6.15

References & sources

Linked CVEs

Show 1392 more CVEs
IDCVE-2026-53090
Linux kernel (GCP) vulnerabilities — CVE-2026-53090 | NEOSEC Intel