9.1

CVE-2026-46185: smb/client: fix out-of-bounds read in symlink_data()

Modified
AliasesUBUNTU-CVE-2026-46185DEBIAN-CVE-2026-46185
Published 28-05-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-46185 is a critical (CVSS 9.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 44.5% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.1 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.53%
0%100%
Low · -0.18 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 39 · Related 41
LSN-0121-1LSN-0122-1OPENSUSE-SU-2026:10954-1OPENSUSE-SU-2026:21388-1RHSA-2026:57251RHSA-2026:63129

Timeline

  1. 28-05-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.53%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

Decrease -0.18 pp

From 0.70% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu138 products
  • linux< 6.8.0-134.134 | < 6.17.0-40.40 | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1060.63 | < 6.17.0-1019.19 | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 76894f3e2f71177747b8b4763fb180e800279585, < 2be11faf79e49fb8250a181ff0b4d2b2f084af83 | ≥ 76894f3e2f71177747b8b4763fb180e800279585, < ef6495d4df6e7af8f3de67e65150881c880f696c | ≥ 76894f3e2f71177747b8b4763fb180e800279585, < 15dc0a4de743a1aaa7b859b3aea79f08c695396c | ≥ 76894f3e2f71177747b8b4763fb180e800279585, < b8c8a704f0bc133deb171f6aeb6f3a684203e212 | ≥ 76894f3e2f71177747b8b4763fb180e800279585, < b9561402489d41149f63e001a74384863b7b30a6 | ≥ 76894f3e2f71177747b8b4763fb180e800279585, < d62b8d236fab503c6fec1d3e9a38bea71feaca20 | 2d046892a493d9760c35fdaefc3017f27f91b621 | ≥ 6.0.16, < 6.1 | 6.1
  • linux_kernel≥ 6.0.16, < 6.1.175 | ≥ 6.2, < 6.6.140 | ≥ 6.7, < 6.12.88 | ≥ 6.13, < 6.18.30 | ≥ 6.19, < 7.0.7 | 7.1:rc1 | 7.1:rc2
Debian1 product
  • linux< 6.1.176-1 | < 6.12.88-1 | < 7.0.7-1

3 vendors · 141 products

References

41 links
Show all 41 references