CVE-2026-46185

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux76894f3e2f71177747b8b4763fb180e800279585 < 2be11faf79e49fb8250a181ff0b4d2b2f084af83affected
LinuxLinux76894f3e2f71177747b8b4763fb180e800279585 < ef6495d4df6e7af8f3de67e65150881c880f696caffected
LinuxLinux76894f3e2f71177747b8b4763fb180e800279585 < 15dc0a4de743a1aaa7b859b3aea79f08c695396caffected
LinuxLinux76894f3e2f71177747b8b4763fb180e800279585 < b8c8a704f0bc133deb171f6aeb6f3a684203e212affected
LinuxLinux76894f3e2f71177747b8b4763fb180e800279585 < b9561402489d41149f63e001a74384863b7b30a6affected
LinuxLinux76894f3e2f71177747b8b4763fb180e800279585 < d62b8d236fab503c6fec1d3e9a38bea71feaca20affected
LinuxLinux2d046892a493d9760c35fdaefc3017f27f91b621affected
LinuxLinux6.0.16 < 6.1affected
LinuxLinux6.1affected
LinuxLinux0 < 6.1unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.88 <= 6.12.*unaffected
LinuxLinux6.18.30 <= 6.18.*unaffected
LinuxLinux7.0.7 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References