CVE-2023-54295
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]
Affected versions
Linux kernel versions
4.20
and later are affected. Fixed in
5.10.173,
5.15.99,
6.1.16,
6.2.3,
6.3
and their respective stable series.
References
The following references provide additional information about CVE-2023-54295 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/53b2916ebde741c657a857fa1936c0d9fcb59170
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PatchKernel patch commithttps://git.kernel.org/stable/c/61d44a4db2f54dbac7d22c2541574ea5755e0468
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PatchKernel patch commithttps://git.kernel.org/stable/c/99341b8aee7b5b4255b339345bbcaa35867dfd0c
Frequently asked questions
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What is CVE-2023-54295?
CVE-2023-54295 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.20 onward and has been patched in 5.10.173, 5.15.99, 6.1.16 and others. CVE-2023-54295 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2023-54295?
Yes — CVE-2023-54295 has been patched. Fixed versions include 5.10.173, 5.15.99, 6.1.16 and others. If you are running Linux kernel 4.20 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2023-54295 actively exploited?
No — CVE-2023-54295 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.