CVE-2026-64381
In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix next buffer leak in receive_encrypted_standard() receive_encrypted_standard() allocates next_buffer before checking whether the number of compound PDUs already reached…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). 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: smb: client: Fix next buffer leak in receive_encrypted_standard() receive_encrypted_standard() allocates next_buffer before checking whether the number of compound PDUs already reached MAX_COMPOUND. If the limit check fails, the function returns immediately and the newly allocated next_buffer is not assigned to server->smallbuf/server->bigbuf, making it leaked. Move the MAX_COMPOUND check before allocating next_buffer.
- 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
- 0.13% probability · 3th 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/07e0ab81df1790afa35732a4e8e07ff831b29008Patch
- https://git.kernel.org/stable/c/1c6267a1d5cf4c73b656f8181b310cbbb3e4767bPatch
- https://git.kernel.org/stable/c/297243e365fc9fe2f8e9b7dd535a65d922cd108bPatch
- https://git.kernel.org/stable/c/67097772df7791c53d608f04bd31c676ccf79b83Patch
- https://git.kernel.org/stable/c/68fc0b6cc03ca58060c0f36454e169f5fe258974Patch
- https://git.kernel.org/stable/c/9136a08dc29328edd9867f2545e73906ac9df93bPatch
- https://git.kernel.org/stable/c/927d4805aea0a287d36dd4f826ee24d69a2afee3Patch
- https://git.kernel.org/stable/c/94e4f672db029414b9888b5137a7559f1febf2d8Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.