firmware: qcom: scm: Fix NULL dereference in IRQ handler before __scm is published
In the Linux kernel, the following vulnerability has been resolved: firmware: qcom: scm: Fix NULL dereference in IRQ handler before __scm is published In qcom_scm_probe(), devm_request_threaded_irq() is called before smp_store_release(&__scm, scm). Two paths can dereference __scm before it is published, both causing a NULL pointer dereference. The IRQ handler receives scm via its data argument but passes only wq_ctx to qcom_scm_waitq_wakeup() and qcom_scm_get_completion(), which then dereference __scm directly. Thread scm through both functions so the IRQ handler path never touches __scm. Non-atomic SMC calls made during probe (e.g. from qcom_tzmem_init via qcom_scm_shm_bridge_enable) can return WAITQ_SLEEP, causing qcom_scm_wait_for_wq_completion() to run before __scm is published and dereference it. Add platform_set_drvdata(pdev, scm) early in probe and change qcom_scm_wait_for_wq_completion() to take the device pointer and use dev_get_drvdata() to reach scm, removing any dependency on __scm.
CVE-2026-90397
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-2026-90397
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": "6bf32599223634294cdc6efb359ffaab1d68073c",
"lessThan": "c9c1e3da0a206270e5df470ca1c82de52190d68c",
"versionType": "git"
},
{
"status": "affected",
"version": "6bf32599223634294cdc6efb359ffaab1d68073c",
"lessThan": "b451f38cb7f5bca78484362347f039c08c94de95",
"versionType": "git"
},
{
"status": "affected",
"version": "6bf32599223634294cdc6efb359ffaab1d68073c",
"lessThan": "1d753df5899ec356272d08bc4718e82844e4bdf0",
"versionType": "git"
},
{
"status": "affected",
"version": "6bf32599223634294cdc6efb359ffaab1d68073c",
"lessThan": "f312ef5026678f14caf1378c5f7fffdf667f9c81",
"versionType": "git"
},
{
"status": "affected",
"version": "6bf32599223634294cdc6efb359ffaab1d68073c",
"lessThan": "966d23c7e68ea32679275a7e3d2383181002c868",
"versionType": "git"
}
],
"programFiles": [
"drivers/firmware/qcom/qcom_scm-smc.c",
"drivers/firmware/qcom/qcom_scm.c",
"drivers/firmware/qcom/qcom_scm.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"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": [
"drivers/firmware/qcom/qcom_scm-smc.c",
"drivers/firmware/qcom/qcom_scm.c",
"drivers/firmware/qcom/qcom_scm.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90397
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48686 · Revision 1
- Added to Heist Feed
- Publisher date