bpf, riscv: Fix extable handling for arena load_acquire
In the Linux kernel, the following vulnerability has been resolved: bpf, riscv: Fix extable handling for arena load_acquire emit_atomic_ld_st() returns 1 to have build_body() skip the zext after a sub-word load_acquire. The caller does "ret = ret ?: add_exception_handler(...)", which skips add_exception_handler() on any non-zero ret, so the extable entry is missing and a faulting PROBE_ATOMIC load_acquire oopses. REG_DONT_CLEAR_MARKER leaves rd stale on fault, and the verifier still thinks the load overwrote it, so a program can leak it through a map. Check ret >= 0 before calling add_exception_handler(), and pass rd for LOAD_ACQ so the fault zeroes rd like a PROBE_MEM load. Return ret unchanged for the zext skip.
CVE-2026-92517
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-2026-92517
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": "fb7cefabae8117c203155ef169a386bec43bbba9",
"lessThan": "26d9496c826586338d1b8c27edfec4a19a89f462",
"versionType": "git"
},
{
"status": "affected",
"version": "fb7cefabae8117c203155ef169a386bec43bbba9",
"lessThan": "08fe2eaa609180c1baeb76c2629a9c82263b0427",
"versionType": "git"
},
{
"status": "affected",
"version": "fb7cefabae8117c203155ef169a386bec43bbba9",
"lessThan": "5eb8921371c6fd117d4a328b6053dfda38707df8",
"versionType": "git"
}
],
"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": "6.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.18",
"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-2026-92517
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #37766 · Revision 1
- Added to Heist Feed
- Publisher date