CVE-2025-68237 (GCVE-0-2025-68237)

Vulnerability from cvelistv5 – Published: 2025-12-16 14:08 – Updated: 2025-12-16 14:08
VLAI?
Title
mtdchar: fix integer overflow in read/write ioctls
Summary
In the Linux kernel, the following vulnerability has been resolved: mtdchar: fix integer overflow in read/write ioctls The "req.start" and "req.len" variables are u64 values that come from the user at the start of the function. We mask away the high 32 bits of "req.len" so that's capped at U32_MAX but the "req.start" variable can go up to U64_MAX which means that the addition can still integer overflow. Use check_add_overflow() to fix this bug.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6420ac0af95dbcb2fd8452e2d551ab50e1bbad83 , < f37efdd97fd1ec3e0d0f1eec279c8279e28f981e (git)
Affected: 6420ac0af95dbcb2fd8452e2d551ab50e1bbad83 , < 457376c6fbf0c69326a9bf1f72416225f681192b (git)
Affected: 6420ac0af95dbcb2fd8452e2d551ab50e1bbad83 , < eb9361484814fb12f3b7544b33835ea67d7a6a97 (git)
Affected: 6420ac0af95dbcb2fd8452e2d551ab50e1bbad83 , < 37944f4f8199cd153fef74e95ca268020162f212 (git)
Affected: 6420ac0af95dbcb2fd8452e2d551ab50e1bbad83 , < e4185bed738da755b191aa3f2e16e8b48450e1b8 (git)
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    Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.118 , ≤ 6.6.* (semver)
Unaffected: 6.12.60 , ≤ 6.12.* (semver)
Unaffected: 6.17.10 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "drivers/mtd/mtdchar.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtdchar: fix integer overflow in read/write ioctls\n\nThe \"req.start\" and \"req.len\" variables are u64 values that come from the\nuser at the start of the function.  We mask away the high 32 bits of\n\"req.len\" so that\u0027s capped at U32_MAX but the \"req.start\" variable can go\nup to U64_MAX which means that the addition can still integer overflow.\n\nUse check_add_overflow() to fix this bug."
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        "shortName": "Linux"
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    "datePublished": "2025-12-16T14:08:30.940Z",
    "dateReserved": "2025-12-16T13:41:40.258Z",
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    "state": "PUBLISHED"
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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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