CVE-2021-47055: mtd: require write permissions for locking and badblock ioctls
First published: Thu Feb 29 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <4.4.269 | 4.4.269 |
| redhat/kernel | <4.9.269 | 4.9.269 |
| redhat/kernel | <4.14.233 | 4.14.233 |
| redhat/kernel | <4.19.191 | 4.19.191 |
| redhat/kernel | <5.4.119 | 5.4.119 |
| redhat/kernel | <5.10.37 | 5.10.37 |
| redhat/kernel | <5.11.21 | 5.11.21 |
| redhat/kernel | <5.12.4 | 5.12.4 |
| redhat/kernel | <5.13 | 5.13 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.6-1 |
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Reference Links
- https://git.kernel.org/stable/c/077259f5e777c3c8821f6b41dee709fcda27306b
- https://git.kernel.org/stable/c/1e97743fd180981bef5f01402342bb54bf1c6366
- https://git.kernel.org/stable/c/5880afefe0cb9b2d5e801816acd58bfe91a96981
- https://git.kernel.org/stable/c/75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37
- https://git.kernel.org/stable/c/7b6552719c0ccbbea29dde4be141da54fdb5877e
- https://git.kernel.org/stable/c/9625b00cac6630479c0ff4b9fafa88bee636e1f0
- https://git.kernel.org/stable/c/a08799d3e8c8088640956237c183f83463c39668
- https://git.kernel.org/stable/c/f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcaf
- https://git.kernel.org/stable/c/f73b29819c6314c0ba8b7d5892dfb03487424bee
- https://access.redhat.com/security/cve/CVE-2021-47055
- https://lore.kernel.org/linux-cve-announce/2024022950-CVE-2021-47055-6927@gregkh/T/#u
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2267186
- https://access.redhat.com/errata/RHSA-2024:3618
- https://access.redhat.com/errata/RHSA-2024:3627
- https://bugzilla.redhat.com/show_bug.cgi?id=2267185
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-47055
- https://nvd.nist.gov/vuln/detail/CVE-2021-47055
- https://launchpad.net/bugs/cve/CVE-2021-47055
- https://security-tracker.debian.org/tracker/CVE-2021-47055
- https://ubuntu.com/security/CVE-2021-47055
- https://git.kernel.org/linus/1e97743fd180981bef5f01402342bb54bf1c6366
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