CVE-2021-47055
In the Linux kernel, the following vulnerability has been resolved: mtd: require write permissions for locking and badblock ioctls MEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits.
Does this matter?
Lower severity and a low EPSS score (0.20%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: mtd: require write permissions for locking and badblock ioctls MEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus require write permission. Depending on the hardware MEMLOCK might even be write-once, e.g. for SPI-NOR flashes with their WP# tied to GND. OTPLOCK is always write-once. MEMSETBADBLOCK modifies the bad block table.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.20% probability · 10th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-667
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/077259f5e777c3c8821f6b41dee709fcda27306bPatch
- https://git.kernel.org/stable/c/1e97743fd180981bef5f01402342bb54bf1c6366Patch
- https://git.kernel.org/stable/c/5880afefe0cb9b2d5e801816acd58bfe91a96981Patch
- https://git.kernel.org/stable/c/75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37Patch
- https://git.kernel.org/stable/c/7b6552719c0ccbbea29dde4be141da54fdb5877ePatch
- https://git.kernel.org/stable/c/9625b00cac6630479c0ff4b9fafa88bee636e1f0Patch
- https://git.kernel.org/stable/c/a08799d3e8c8088640956237c183f83463c39668Patch
- https://git.kernel.org/stable/c/f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcafPatch
- https://git.kernel.org/stable/c/f73b29819c6314c0ba8b7d5892dfb03487424beePatch
- https://git.kernel.org/stable/c/077259f5e777c3c8821f6b41dee709fcda27306bPatch
- https://git.kernel.org/stable/c/1e97743fd180981bef5f01402342bb54bf1c6366Patch
- https://git.kernel.org/stable/c/5880afefe0cb9b2d5e801816acd58bfe91a96981Patch
- https://git.kernel.org/stable/c/75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37Patch
- https://git.kernel.org/stable/c/7b6552719c0ccbbea29dde4be141da54fdb5877ePatch
- https://git.kernel.org/stable/c/9625b00cac6630479c0ff4b9fafa88bee636e1f0Patch
- https://git.kernel.org/stable/c/a08799d3e8c8088640956237c183f83463c39668Patch
- https://git.kernel.org/stable/c/f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcafPatch
- https://git.kernel.org/stable/c/f73b29819c6314c0ba8b7d5892dfb03487424beePatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.