riscv, bpf: Fix kernel stack corruption in tailcall with CFI
In the Linux kernel, the following vulnerability has been resolved: riscv, bpf: Fix kernel stack corruption in tailcall with CFI When CONFIG_CFI_CLANG is enabled, prog->bpf_func already skips the kcfi instruction during setup. Including it again in the tailcall jump offset causes it to jump over an extra 4 bytes, skipping the stack pointer adjustment, which will result in kernel stack corruption.
CVE-2026-92518
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-2026-92518
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": "30a59cc79754fd9ff3f41b7ee2eb21da85988548",
"lessThan": "34b1bb33a025787e05f966e74de18cd36276f801",
"versionType": "git"
},
{
"status": "affected",
"version": "30a59cc79754fd9ff3f41b7ee2eb21da85988548",
"lessThan": "a6e11a81da3420fd37f1518d4f238c4d5784086e",
"versionType": "git"
},
{
"status": "affected",
"version": "30a59cc79754fd9ff3f41b7ee2eb21da85988548",
"lessThan": "52fb1756ea1d2759dfef2d86245be00b05dac3a2",
"versionType": "git"
},
{
"status": "affected",
"version": "fe5b68fdcec0f3d97a32f4c4acfef59cf90718f7",
"versionType": "git"
},
{
"status": "affected",
"version": "6.11.6",
"lessThan": "6.12",
"versionType": "semver"
}
],
"programFiles": [
"arch/riscv/net/bpf_jit_comp64.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/riscv/net/bpf_jit_comp64.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-92518
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #37767 · Revision 1
- Added to Heist Feed
- Publisher date