5.5

CVE-2024-46742: smb/server: fix potential null-ptr-deref of lease_ctx_info in smb2_open()

Modified
AliasesUBUNTU-CVE-2024-46742DEBIAN-CVE-2024-46742
Published 18-09-2024Last modified 11-05-2026

Vulnerability summary

CVE-2024-46742 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 18.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.26%
0%100%
Low · 0.00 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 14 · Related 10
DLA-4193-1DSA-5907-1MGASA-2024-0316MGASA-2024-0318USN-7654-1USN-7654-2

Timeline

  1. 18-09-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: smb/server: fix potential null-ptr-deref of lease_ctx_info in smb2_open() null-ptr-deref will occur when (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) and parse_lease_state() return NULL. Fix this by check if 'lease_ctx_info' is NULL. Additionally, remove the redundant parentheses in parse_durable_handle_context().

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.26% 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: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu121 products
  • linux< 5.15.0-144.157 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1088.95 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 878f32878351104448b86ef5b85d1f8ed6f599fb | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < ec28c35029b7930f31117f9284874b63bea4f31b | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 07f384c5be1f8633b13f0a22616e227570450bc6 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 3b692794b81f2ecad69a4adbba687f3836824ada | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 4e8771a3666c8f216eefd6bd2fd50121c6c437db | 5.15
  • linux_kernel< 6.6.51 | ≥ 6.7, < 6.10.10 | 6.11:rc1 | 6.11:rc2 | 6.11:rc3 | 6.11:rc4
Debian1 product
  • linux< 6.1.135-1 | < 6.10.11-1

3 vendors · 124 products

References

21 links
Show all 21 references