CVE-2026-46185

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

At a glance

Severity
CRITICAL 9.1
EPSS
EPSS 0.53 % · percentile 44 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

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.

Scores

VersionScoreVectorScored by
CVSS 3.1CRITICAL 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HLinux
CVSS 3.1CRITICAL 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Weaknesses (CWE)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected 76894f3e2f71177747b8b4763fb180e800279585 < 2be11faf79e49fb8250a181ff0b4d2b2f084af83 ; affected 76894f3e2f71177747b8b4763fb180e800279585 < ef6495d4df6e7af8f3de67e65150881c880f696c ; affected 76894f3e2f71177747b8b4763fb180e800279585 < 15dc0a4de743a1aaa7b859b3aea79f08c695396c ; affected 76894f3e2f71177747b8b4763fb180e800279585 < b8c8a704f0bc133deb171f6aeb6f3a684203e212 ; affected 76894f3e2f71177747b8b4763fb180e800279585 < b9561402489d41149f63e001a74384863b7b30a6 ; affected 76894f3e2f71177747b8b4763fb180e800279585 < d62b8d236fab503c6fec1d3e9a38bea71feaca20
Linux · Linuxaffected 6.1 ; unaffected 0 < 6.1 ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.140 ≤ 6.6.* ; unaffected 6.12.88 ≤ 6.12.* ; unaffected 6.18.30 ≤ 6.18.*

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD