riscv: trace: fix snapshot deadlock with sbi ecall
In the Linux kernel, the following vulnerability has been resolved: riscv: trace: fix snapshot deadlock with sbi ecall If sbi_ecall.c's functions are traceable, echo "__sbi_ecall:snapshot" > /sys/kernel/tracing/set_ftrace_filter may get the kernel into a deadlock. (Functions in sbi_ecall.c are excluded from tracing if CONFIG_RISCV_ALTERNATIVE_EARLY is set.) __sbi_ecall triggers a snapshot of the ringbuffer. The snapshot code raises an IPI interrupt, which results in another call to __sbi_ecall and another snapshot... All it takes to get into this endless loop is one initial __sbi_ecall. On RISC-V systems without SSTC extension, the clock events in timer-riscv.c issue periodic sbi ecalls, making the problem easy to trigger. Always exclude the sbi_ecall.c functions from tracing to fix the potential deadlock. sbi ecalls can easiliy be logged via trace events, excluding ecall functions from function tracing is not a big limitation.
CVE-2026-23217
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-2026-23217
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": "1ff95eb2bebda50c4c5406caaf201e0fcb24cc8f",
"lessThan": "f8b8ec0ddde74066d4452a7a961da544f193e00f",
"versionType": "git"
},
{
"status": "affected",
"version": "1ff95eb2bebda50c4c5406caaf201e0fcb24cc8f",
"lessThan": "b1f8285bc8e3508c1fde23b5205f1270215d4984",
"versionType": "git"
},
{
"status": "affected",
"version": "1ff95eb2bebda50c4c5406caaf201e0fcb24cc8f",
"lessThan": "b0d7f5f0c9f05f1b6d4ee7110f15bef9c11f9df0",
"versionType": "git"
},
{
"status": "affected",
"version": "82f134ddd4f5da11c277bd1aa02e2a733179725a",
"versionType": "git"
},
{
"status": "affected",
"version": "6.10.10",
"lessThan": "6.11",
"versionType": "semver"
}
],
"programFiles": [
"arch/riscv/kernel/Makefile"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.10",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/riscv/kernel/Makefile"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-23217
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46113 · Revision 1
- Added to Heist Feed
- Publisher date