CVE-2026-46185 PUBLISHED

smb/client: fix out-of-bounds read in symlink_data()

Assigner: Linux
Reserved: 13.05.2026 Published: 28.05.2026 Updated: 30.05.2026

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

smb/client: fix out-of-bounds read in symlink_data()

Since smb2_check_message() returns success without length validation for the symlink error response, in symlink_data() it is possible for iov->iov_len to be smaller than sizeof(struct smb2_err_rsp). If the buffer only contains the base SMB2 header (64 bytes), accessing err->ErrorContextCount (at offset 66) or err->ByteCount later in symlink_data() will cause an out-of-bounds read.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS Score: 9.1

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 76894f3e2f71177747b8b4763fb180e800279585 to ef6495d4df6e7af8f3de67e65150881c880f696c (excl.)
  • affected from 76894f3e2f71177747b8b4763fb180e800279585 to 15dc0a4de743a1aaa7b859b3aea79f08c695396c (excl.)
  • affected from 76894f3e2f71177747b8b4763fb180e800279585 to b8c8a704f0bc133deb171f6aeb6f3a684203e212 (excl.)
  • affected from 76894f3e2f71177747b8b4763fb180e800279585 to b9561402489d41149f63e001a74384863b7b30a6 (excl.)
  • affected from 76894f3e2f71177747b8b4763fb180e800279585 to d62b8d236fab503c6fec1d3e9a38bea71feaca20 (excl.)
  • Version 2d046892a493d9760c35fdaefc3017f27f91b621 is affected
  • affected from 6.0.16 to 6.1 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.1 is affected
  • unaffected from 0 to 6.1 (excl.)
  • unaffected from 6.6.140 to 6.6.* (incl.)
  • unaffected from 6.12.88 to 6.12.* (incl.)
  • unaffected from 6.18.30 to 6.18.* (incl.)
  • unaffected from 7.0.7 to 7.0.* (incl.)
  • unaffected from 7.1-rc3 to * (incl.)

References