CVE-2026-31485spi: spi-fsl-lpspi: fix teardown order issue (UAF)
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: spi: spi-fsl-lpspi: fix teardown order issue (UAF) There is a teardown order issue in the driver. The SPI controller is registered using devm_spi_register_controller(), which delays unregistration of the SPI controller until after the fsl_lpspi_remove() function returns. As the fsl_lpspi_remove() function synchronously tears down the DMA channels, a running SPI transfer triggers the following NULL pointer dereference due to use after free: | fsl_lpspi 42550000.spi: I/O Error in DMA RX | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [...] | Call trace: | fsl_lpspi_dma_transfer+0x260/0x340 [spi_fsl_lpspi] | fsl_lpspi_transfer_one+0x198/0x448 [spi_fsl_lpspi] | spi_transfer_one_message+0x49c/0x7c8 | __spi_pump_transfer_message+0x120/0x420 | __spi_sync+0x2c4/0x520 | spi_sync+0x34/0x60 | spidev_message+0x20c/0x378 [spidev] | spidev_ioctl+0x398/0x750 [spidev] [...] Switch from devm_spi_register_controller() to spi_register_controller() in fsl_lpspi_probe() and add the corresponding spi_unregister_controller() in fsl_lpspi_remove().
Timeline
ID reserved
By Linux
- 44 days later
· 44 days later
Published
- 7 months later
· 7 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 5314987de5e5f5e38436ef4a69328bc472bbd63e – < fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6
- affected 5314987de5e5f5e38436ef4a69328bc472bbd63e – < ca4483f36ac1b62e69f8b182c5b8f059e0abecfb
- affected 5314987de5e5f5e38436ef4a69328bc472bbd63e – < e3fd54f8b0317fbccc103961ddd660f2a32dcf0b
- affected 5314987de5e5f5e38436ef4a69328bc472bbd63e – < adb25339b66112393fd6892ceff926765feb5b86
- affected 5314987de5e5f5e38436ef4a69328bc472bbd63e – < d5d01f24bc6fbde40b4e567ef9160194b61267bc
- affected 5314987de5e5f5e38436ef4a69328bc472bbd63e – < e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3
- affected 5314987de5e5f5e38436ef4a69328bc472bbd63e – < 15650dfbaeeb14bcaaf053b93cf631db8d465300
- affected 5314987de5e5f5e38436ef4a69328bc472bbd63e – < b341c1176f2e001b3adf0b47154fc31589f7410e
- affected 4.10
- unaffected < 4.10
- unaffected 5.10.253 – ≤ 5.10.*
- unaffected 5.15.203 – ≤ 5.15.*
- unaffected 6.1.168 – ≤ 6.1.*
- unaffected 6.6.131 – ≤ 6.6.*
- unaffected 6.12.80 – ≤ 6.12.*
- unaffected 6.18.21 – ≤ 6.18.*
- unaffected 6.19.11 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References11
- https://git.kernel.org/stable/c/fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6 (opens in a new tab)
- https://git.kernel.org/stable/c/ca4483f36ac1b62e69f8b182c5b8f059e0abecfb (opens in a new tab)
- https://git.kernel.org/stable/c/e3fd54f8b0317fbccc103961ddd660f2a32dcf0b (opens in a new tab)
- https://git.kernel.org/stable/c/adb25339b66112393fd6892ceff926765feb5b86 (opens in a new tab)
- https://git.kernel.org/stable/c/d5d01f24bc6fbde40b4e567ef9160194b61267bc (opens in a new tab)
- https://git.kernel.org/stable/c/e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3 (opens in a new tab)
- https://git.kernel.org/stable/c/15650dfbaeeb14bcaaf053b93cf631db8d465300 (opens in a new tab)
- https://git.kernel.org/stable/c/b341c1176f2e001b3adf0b47154fc31589f7410e (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-24849 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-31485)Record last updated .