bpf: Fix ld_{abs,ind} failure path analysis in subprogs
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.
CVE-2026-53090
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-53090
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "09b28d76eac48e922dc293da1aa2b2b85c32aeee",
"lessThan": "928d354ae3557e8f755a227e67be88034eb3cd7f",
"versionType": "git"
},
{
"status": "affected",
"version": "09b28d76eac48e922dc293da1aa2b2b85c32aeee",
"lessThan": "8a800497d9f6c2ec9c2c1ba7b71d0ac2ea7f7bbe",
"versionType": "git"
},
{
"status": "affected",
"version": "09b28d76eac48e922dc293da1aa2b2b85c32aeee",
"lessThan": "de1055e7f9e67af32b1f3376066272b04e5223c0",
"versionType": "git"
},
{
"status": "affected",
"version": "09b28d76eac48e922dc293da1aa2b2b85c32aeee",
"lessThan": "37ad2bb11e9de92cb7b94548705eeedd87f7d392",
"versionType": "git"
},
{
"status": "affected",
"version": "09b28d76eac48e922dc293da1aa2b2b85c32aeee",
"lessThan": "8674e2db06cff6b50f2216eed9a761d15425bb34",
"versionType": "git"
},
{
"status": "affected",
"version": "09b28d76eac48e922dc293da1aa2b2b85c32aeee",
"lessThan": "ce01a4e5cfac7adbe0be565f90cd32ecbb2f8337",
"versionType": "git"
},
{
"status": "affected",
"version": "09b28d76eac48e922dc293da1aa2b2b85c32aeee",
"lessThan": "d846d83bdacbd8f14fc45c63b8c1d22608452e1c",
"versionType": "git"
},
{
"status": "affected",
"version": "09b28d76eac48e922dc293da1aa2b2b85c32aeee",
"lessThan": "ee861486e377edc55361c08dcbceab3f6b6577bd",
"versionType": "git"
}
],
"programFiles": [
"kernel/bpf/verifier.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.10",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/verifier.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53090
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40750 · Revision 1
- Added to Heist Feed
- Publisher date