bpf: Fix ld_{abs,ind} failure path analysis in subprogs

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-53090
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 17:17:23 UTC
Updated2026-08-03 10:16:30 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 6.4 MEDIUM from ADP

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001310000 probability, percentile 0.031030000 (date 2026-08-04)

Problem Types: NVD-CWE-noinfo | CWE-253 | CWE-253 Incorrect Check of Function Return Value

VersionSourceTypeScoreSeverityVector
3.1ADPCVSS6.4MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.10b0ca135-0b70-47e7-9f44-1890c2a1c46cSecondary6.4MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 09b28d76eac48e922dc293da1aa2b2b85c32aeee 37ad2bb11e9de92cb7b94548705eeedd87f7d392 git Not specified
CNA Linux Linux affected 09b28d76eac48e922dc293da1aa2b2b85c32aeee 8674e2db06cff6b50f2216eed9a761d15425bb34 git Not specified
CNA Linux Linux affected 09b28d76eac48e922dc293da1aa2b2b85c32aeee ce01a4e5cfac7adbe0be565f90cd32ecbb2f8337 git Not specified
CNA Linux Linux affected 09b28d76eac48e922dc293da1aa2b2b85c32aeee d846d83bdacbd8f14fc45c63b8c1d22608452e1c git Not specified
CNA Linux Linux affected 09b28d76eac48e922dc293da1aa2b2b85c32aeee ee861486e377edc55361c08dcbceab3f6b6577bd git Not specified
CNA Linux Linux affected 5.10 Not specified
CNA Linux Linux unaffected 5.10 semver Not specified
CNA Linux Linux unaffected 6.6.148 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.101 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.42 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified
ADP Red Hat Red Hat Enterprise Linux 10 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 9 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/security/cve/CVE-2026-53090 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
bugzilla.redhat.com/show_bug.cgi 0b0ca135-0b70-47e7-9f44-1890c2a1c46c bugzilla.redhat.com Third Party Advisory
git.kernel.org/stable/c/ee861486e377edc55361c08dcbceab3f6b6577bd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53090.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c security.access.redhat.com Third Party Advisory
git.kernel.org/stable/c/37ad2bb11e9de92cb7b94548705eeedd87f7d392 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ce01a4e5cfac7adbe0be565f90cd32ecbb2f8337 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d846d83bdacbd8f14fc45c63b8c1d22608452e1c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8674e2db06cff6b50f2216eed9a761d15425bb34 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
ADP2026-06-24T00:00:00.000ZReported to Red Hat.
ADP2026-06-24T00:00:00.000ZMade public.

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