spi: spi-qpic-snand: reallocate BAM transactions

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-38398
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-07-25 13:15:29 UTC
Updated2026-07-30 06:23:12 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: spi: spi-qpic-snand: reallocate BAM transactions Using the mtd_nandbiterrs module for testing the driver occasionally results in weird things like below. 1. swiotlb mapping fails with the following message: [ 85.926216] qcom_snand 79b0000.spi: swiotlb buffer is full (sz: 4294967294 bytes), total 512 (slots), used 0 (slots) [ 85.932937] qcom_snand 79b0000.spi: failure in mapping desc [ 87.999314] qcom_snand 79b0000.spi: failure to write raw page [ 87.999352] mtd_nandbiterrs: error: write_oob failed (-110) Rebooting the board after this causes a panic due to a NULL pointer dereference. 2. If the swiotlb mapping does not fail, rebooting the board may result in a different panic due to a bad spinlock magic: [ 256.104459] BUG: spinlock bad magic on CPU#3, procd/2241 [ 256.104488] Unable to handle kernel paging request at virtual address ffffffff0000049b ... Investigating the issue revealed that these symptoms are results of memory corruption which is caused by out of bounds access within the driver. The driver uses a dynamically allocated structure for BAM transactions, which structure must have enough space for all possible variations of different flash operations initiated by the driver. The required space heavily depends on the actual number of 'codewords' which is calculated from the pagesize of the actual NAND chip. Although the qcom_nandc_alloc() function allocates memory for the BAM transactions during probe, but since the actual number of 'codewords' is not yet know the allocation is done for one 'codeword' only. Because of this, whenever the driver does a flash operation, and the number of the required transactions exceeds the size of the allocated arrays the driver accesses memory out of the allocated range. To avoid this, change the code to free the initially allocated BAM transactions memory, and allocate a new one once the actual number of 'codewords' required for a given NAND chip is known.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.001360000 probability, percentile 0.034740000 (date 2026-07-30)

Problem Types: CWE-476

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All
Operating System Linux Linux Kernel 6.16 rc1 All All
Operating System Linux Linux Kernel 6.16 rc2 All All
Operating System Linux Linux Kernel 6.16 rc3 All All
Operating System Linux Linux Kernel 6.16 rc4 All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7304d1909080ef0c9da703500a97f46c98393fcd 86fb36de1132b560f9305f0c78fa69f459fa0980 git Not specified
CNA Linux Linux affected 7304d1909080ef0c9da703500a97f46c98393fcd d85d0380292a7e618915069c3579ae23c7c80339 git Not specified
CNA Linux Linux affected 6.15 Not specified
CNA Linux Linux unaffected 6.15 semver Not specified
CNA Linux Linux unaffected 6.15.6 6.15.* semver Not specified
CNA Linux Linux unaffected 6.16 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d85d0380292a7e618915069c3579ae23c7c80339 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/86fb36de1132b560f9305f0c78fa69f459fa0980 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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