CVE-2022-49044
In the Linux kernel, the following vulnerability has been resolved: dm integrity: fix memory corruption when tag_size is less than digest size It is possible to set up dm-integrity in such a way that the "tag_size" parameter is less than the actual…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.28%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: dm integrity: fix memory corruption when tag_size is less than digest size It is possible to set up dm-integrity in such a way that the "tag_size" parameter is less than the actual digest size. In this situation, a part of the digest beyond tag_size is ignored. In this case, dm-integrity would write beyond the end of the ic->recalc_tags array and corrupt memory. The corruption happened in integrity_recalc->integrity_sector_checksum->crypto_shash_final. Fix this corruption by increasing the tags array so that it has enough padding at the end to accomodate the loop in integrity_recalc() being able to write a full digest size for the last member of the tags array.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.28% probability · 20th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/08c1af8f1c13bbf210f1760132f4df24d0ed46d6Patch
- https://git.kernel.org/stable/c/4d485cf9b609709e45d5113e6e2b1b01254b2fe9Patch
- https://git.kernel.org/stable/c/6a95d91c0b315c965198f6ab7dec7c94129e17e0Patch
- https://git.kernel.org/stable/c/6b4bf97587ef6c1927a78934b700204920655123Patch
- https://git.kernel.org/stable/c/7f84c937222944c03f4615ca4742df6bed0e5adfPatch
- https://git.kernel.org/stable/c/cd02b2687d66f0a8e716384de4b9a0671331f1dcPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.