CVE-2024-43854

Summary

In the Linux kernel, the following vulnerability has been resolved:

block: initialize integrity buffer to zero before writing it to media

Metadata added by bio_integrity_prep is using plain kmalloc, which leads to random kernel memory being written media. For PI metadata this is limited to the app tag that isn't used by kernel generated metadata, but for non-PI metadata the entire buffer leaks kernel memory.

Fix this by adding the __GFP_ZERO flag to allocations for writes.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7ba1ba12eeef0aa7113beb16410ef8b7c748e18b < 9f4af4cf08f9a0329ade3d938f55d2220c40d0a6affected
LinuxLinux7ba1ba12eeef0aa7113beb16410ef8b7c748e18b < 129f95948a96105c1fad8e612c9097763e88ac5faffected
LinuxLinux7ba1ba12eeef0aa7113beb16410ef8b7c748e18b < 3fd11fe4f20756b4c0847f755a64cd96f8c6a005affected
LinuxLinux7ba1ba12eeef0aa7113beb16410ef8b7c748e18b < cf6b45ea7a8df0f61bded1dc4a8561ac6ad143d2affected
LinuxLinux7ba1ba12eeef0aa7113beb16410ef8b7c748e18b < d418313bd8f55c079a7da12651951b489a638ac1affected
LinuxLinux7ba1ba12eeef0aa7113beb16410ef8b7c748e18b < 23a19655fb56f241e592041156dfb1c6d04da644affected
LinuxLinux7ba1ba12eeef0aa7113beb16410ef8b7c748e18b < ebc0e91ba76dc6544fff9f5b66408b1982806a00affected
LinuxLinux7ba1ba12eeef0aa7113beb16410ef8b7c748e18b < 899ee2c3829c5ac14bfc7d3c4a5846c0b709b78faffected
LinuxLinux2.6.27affected
LinuxLinux0 < 2.6.27unaffected
LinuxLinux4.19.322 <= 4.19.*unaffected
LinuxLinux5.4.284 <= 5.4.*unaffected
LinuxLinux5.10.226 <= 5.10.*unaffected
LinuxLinux5.15.165 <= 5.15.*unaffected
LinuxLinux6.1.103 <= 6.1.*unaffected
LinuxLinux6.6.44 <= 6.6.*unaffected
LinuxLinux6.10.3 <= 6.10.*unaffected
LinuxLinux6.11 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References