CVE-2025-21946
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds in parse_sec_desc() If osidoffset, gsidoffset and dacloffset could be greater than smb_ntsd struct size.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.48%). 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: ksmbd: fix out-of-bounds in parse_sec_desc() If osidoffset, gsidoffset and dacloffset could be greater than smb_ntsd struct size. If it is smaller, It could cause slab-out-of-bounds. And when validating sid, It need to check it included subauth array size.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 0.48% probability · 40th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/159d059cbcb0e6d0e7a7b34af3862ba09a6b22d1Patch
- https://git.kernel.org/stable/c/6a9831180d0b23b5c97e2bd841aefc8f82900172Patch
- https://git.kernel.org/stable/c/c1569dbbe2d43041be9f3fef7ca08bec3b66ad1bPatch
- https://git.kernel.org/stable/c/d6e13e19063db24f94b690159d0633aaf72a0f03Patch
- https://git.kernel.org/stable/c/f4ee19528664777af8b842f8f001be98345aa973
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.