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spi: tegra210-quad: Protect curr_xfer check in IRQ handler (Linux Linux)

CVE-2026-23207
MEDIUM 4.7

En bref

Source
NVD
EPSS
EPSS 0.14 % · centile 3 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Rechercher sur…

Description

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.

Faiblesses (CWE)

  • CWE-362 — Situation de compétition
  • CWE-416 — Utilisation après libération

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 83309dd551cfd60a5a1a98d9cab19f435b44d46d < 8261fa3da6e9001be95a54b857df9759e9098d2f ; affected c934e40246da2c5726d14e94719c514e30840df8 < 513587caec66b67243027f26867ad3512f06744f ; affected 551060efb156c50fe33799038ba8145418cfdeef < 84e926c1c272a35ddb9b86842d32fa833a60dfc7 ; affected 01bbf25c767219b14c3235bfa85906b8d2cb8fbc < 2ac3a105e51496147c0e44e49466eecfcc532d57 ; affected b4e002d8a7cee3b1d70efad0e222567f92a73000 < edf9088b6e1d6d88982db7eb5e736a0e4fbcc09e ; affected 88db8bb7ed1bb474618acdf05ebd4f0758d244e2
Linux · Linuxaffected 6.1.160 < 6.1.191 ; affected 6.6.120 < 6.6.160 ; affected 6.12.63 < 6.12.80 ; affected 6.18.2 < 6.18.10

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD