mtd: spi-nor: Fix shift-out-of-bounds in spi_nor_set_erase_type
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
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- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 1 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: mtd: spi-nor: Fix shift-out-of-bounds in spi_nor_set_erase_type spi_nor_set_erase_type() was used either to set or to mask out an erase type. When we used it to mask out an erase type a shift-out-of-bounds was hit: UBSAN: shift-out-of-bounds in drivers/mtd/spi-nor/core.c:2237:24 shift exponent 4294967295 is too large for 32-bit type 'int' The setting of the size_{shift, mask} and of the opcode are unnecessary when the erase size is zero, as throughout the code just the erase size is considered to determine whether an erase type is supported or not. Setting the opcode to 0xFF was wrong too as nobody guarantees that 0xFF is an unused opcode. Thus when masking out an erase type, just set the erase size to zero. This will fix the shift-out-of-bounds. [ta: refine changes, new commit message, fix compilation error]
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.173, 5.15.99, 6.1.16, 6.2.3, 6.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 4 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2023-54295
- 2026-10-03 Alias added: GHSA-3x4v-mgvj-ccrv
References
Other 5
- https://git.kernel.org/stable/c/e6409208c13f7c56adc12dd795abf4141e3d5e64
- https://git.kernel.org/stable/c/61d44a4db2f54dbac7d22c2541574ea5755e0468
- https://git.kernel.org/stable/c/53b2916ebde741c657a857fa1936c0d9fcb59170
- https://git.kernel.org/stable/c/99341b8aee7b5b4255b339345bbcaa35867dfd0c
- https://git.kernel.org/stable/c/f0f0cfdc3a024e21161714f2e05f0df3b84d42ad
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Sources
- CVE-2023-54295 · CVE Program
- CVE-2023-54295 · NVD
- FIRST EPSS
- GHSA-3x4v-mgvj-ccrv · GitHub Advisory Database · CC BY 4.0
- CVE-2023-54295 · Red Hat security data · CC BY 4.0
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