spi: tegra210-quad: Protect curr_xfer check in IRQ handler
In the Linux kernel, the following vulnerability has been resolved: spi: tegra210-quad: Protect curr_xfer check in IRQ handler Now that all other accesses to curr_xfer are done under the lock, protect the curr_xfer NULL check in tegra_qspi_isr_thread() with the spinlock. Without this protection, the following race can occur: CPU0 (ISR thread) CPU1 (timeout path) ---------------- ------------------- if (!tqspi->curr_xfer) // sees non-NULL spin_lock() tqspi->curr_xfer = NULL spin_unlock() handle_*_xfer() spin_lock() t = tqspi->curr_xfer // NULL! ... t->len ... // NULL dereference! With this patch, all curr_xfer accesses are now properly synchronized. Although all accesses to curr_xfer are done under the lock, in tegra_qspi_isr_thread() it checks for NULL, releases the lock and reacquires it later in handle_cpu_based_xfer()/handle_dma_based_xfer(). There is a potential for an update in between, which could cause a NULL pointer dereference. To handle this, add a NULL check inside the handlers after acquiring the lock. This ensures that if the timeout path has already cleared curr_xfer, the handler will safely return without dereferencing the NULL pointer.
CVE-2026-23207
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-2026-23207
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": "c934e40246da2c5726d14e94719c514e30840df8",
"lessThan": "513587caec66b67243027f26867ad3512f06744f",
"versionType": "git"
},
{
"status": "affected",
"version": "551060efb156c50fe33799038ba8145418cfdeef",
"lessThan": "84e926c1c272a35ddb9b86842d32fa833a60dfc7",
"versionType": "git"
},
{
"status": "affected",
"version": "01bbf25c767219b14c3235bfa85906b8d2cb8fbc",
"lessThan": "2ac3a105e51496147c0e44e49466eecfcc532d57",
"versionType": "git"
},
{
"status": "affected",
"version": "b4e002d8a7cee3b1d70efad0e222567f92a73000",
"lessThan": "edf9088b6e1d6d88982db7eb5e736a0e4fbcc09e",
"versionType": "git"
},
{
"status": "affected",
"version": "88db8bb7ed1bb474618acdf05ebd4f0758d244e2",
"versionType": "git"
},
{
"status": "affected",
"version": "83309dd551cfd60a5a1a98d9cab19f435b44d46d",
"versionType": "git"
},
{
"status": "affected",
"version": "bb0c58be84f907285af45657c1d4847b960a12bf",
"versionType": "git"
},
{
"status": "affected",
"version": "5.15.198",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.160",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.17.13",
"lessThan": "6.18",
"versionType": "semver"
}
],
"programFiles": [
"drivers/spi/spi-tegra210-quad.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6.120",
"lessThan": "6.6.160",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.63",
"lessThan": "6.12.80",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.2",
"lessThan": "6.18.10",
"versionType": "semver"
}
],
"programFiles": [
"drivers/spi/spi-tegra210-quad.c"
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-23207
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46109 · Revision 1
- Added to Heist Feed
- Publisher date