CVE-2023-54250
published 2025-12-30CVE-2023-54250: In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decode_preauth_ctxt() Confirm that the accessed…
PriorityP341high8.2CVSS 3.1
AVNACLPRNUINSUCLINAH
EPSS
0.48%
41.4th percentile
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: avoid out of bounds access in decode_preauth_ctxt()
Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within
the SMB request boundary; deassemble_neg_contexts() only checks that the
eight byte smb2_neg_context header + (client controlled) DataLength are
within the packet boundary, which is insufficient.
Checking for sizeof(struct smb2_preauth_neg_context) is overkill given
that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.25-1 (bookworm) | linux 6.1.25-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 39f5b4b313b445c980a2a295bed28228c29228ed | 39f5b4b313b445c980a2a295bed28228c29228ed |
| linux | linux | >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < a2f6ded41bec1d3be643c80a5eb97f1680309001 | a2f6ded41bec1d3be643c80a5eb97f1680309001 |
| linux | linux | >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < f02edb9debbd36f44efa7567031485892c7df60d | f02edb9debbd36f44efa7567031485892c7df60d |
| linux | linux | >= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < e7067a446264a7514fa1cfaa4052cdb6803bc6a2 | e7067a446264a7514fa1cfaa4052cdb6803bc6a2 |
| linux | linux_kernel | >= 0 < 6.1.25-1 | 6.1.25-1 |
| linux | linux_kernel | >= 0 < 6.1.25-1 | 6.1.25-1 |
| linux | linux_kernel | >= 0 < 6.1.25-1 | 6.1.25-1 |
| linux | linux_kernel | >= 5.15.0 < 5.15.145 | 5.15.145 |
| linux | linux_kernel | >= 5.16.0 < 6.1.25 | 6.1.25 |
| linux | linux_kernel | >= 6.2.0 < 6.2.12 | 6.2.12 |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
OSV
CVE-2023-54250: In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decode_preauth_ctxt() Confirm that the access
osv·2025-12-30
CVE-2023-54250 CVE-2023-54250: In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decode_preauth_ctxt() Confirm that the access
In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decode_preauth_ctxt() Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within the SMB request boundary; deassemble_neg_contexts() only checks that the eight byte smb2_neg_context header + (client controlled) DataLength are within the packet boundary, which is insufficient. Checking for sizeof(struct smb2_preauth_neg_context) is overkill given that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.
OSV
ksmbd: avoid out of bounds access in decode_preauth_ctxt()
osv·2025-12-30
CVE-2023-54250 ksmbd: avoid out of bounds access in decode_preauth_ctxt()
ksmbd: avoid out of bounds access in decode_preauth_ctxt()
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: avoid out of bounds access in decode_preauth_ctxt()
Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within
the SMB request boundary; deassemble_neg_contexts() only checks that the
eight byte smb2_neg_context header + (client controlled) DataLength are
within the packet boundary, which is insufficient.
Checking for sizeof(struct smb2_preauth_neg_context) is overkill given
that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.
GHSA
GHSA-f39w-x49r-j8p2: In the Linux kernel, the following vulnerability has been resolved:
ksmbd: avoid out of bounds access in decode_preauth_ctxt()
Confirm that the acce
ghsa_unreviewed·2025-12-30
CVE-2023-54250 GHSA-f39w-x49r-j8p2: In the Linux kernel, the following vulnerability has been resolved:
ksmbd: avoid out of bounds access in decode_preauth_ctxt()
Confirm that the acce
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: avoid out of bounds access in decode_preauth_ctxt()
Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within
the SMB request boundary; deassemble_neg_contexts() only checks that the
eight byte smb2_neg_context header + (client controlled) DataLength are
within the packet boundary, which is insufficient.
Checking for sizeof(struct smb2_preauth_neg_context) is overkill given
that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.
Red Hat
kernel: ksmbd: avoid out of bounds access in decode_preauth_ctxt()
vendor_redhat·2025-12-30
CVE-2023-54250 kernel: ksmbd: avoid out of bounds access in decode_preauth_ctxt()
kernel: ksmbd: avoid out of bounds access in decode_preauth_ctxt()
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: avoid out of bounds access in decode_preauth_ctxt()
Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within
the SMB request boundary; deassemble_neg_contexts() only checks that the
eight byte smb2_neg_context header + (client controlled) DataLength are
within the packet boundary, which is insufficient.
Checking for sizeof(struct smb2_preauth_neg_context) is overkill given
that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.
Package: kernel (Red Hat Enterprise Linux 10) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package:
Debian
CVE-2023-54250: linux - In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoi...
vendor_debian·2023
CVE-2023-54250 CVE-2023-54250: linux - In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoi...
In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decode_preauth_ctxt() Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within the SMB request boundary; deassemble_neg_contexts() only checks that the eight byte smb2_neg_context header + (client controlled) DataLength are within the packet boundary, which is insufficient. Checking for sizeof(struct smb2_preauth_neg_context) is overkill given that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.
Scope: local
bookworm: resolved (fixed in 6.1.25-1)
bullseye: resolved
forky: resolved (fixed in 6.1.25-1)
sid: resolved (fixed in 6.1.25-1)
trixie: resolved (fixed in 6.1.25-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2023-54250 kernel: ksmbd: avoid out of bounds access in decode_preauth_ctxt()
bugzilla·2025-12-30
CVE-2023-54250 CVE-2023-54250 kernel: ksmbd: avoid out of bounds access in decode_preauth_ctxt()
CVE-2023-54250 kernel: ksmbd: avoid out of bounds access in decode_preauth_ctxt()
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: avoid out of bounds access in decode_preauth_ctxt()
Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within
the SMB request boundary; deassemble_neg_contexts() only checks that the
eight byte smb2_neg_context header + (client controlled) DataLength are
within the packet boundary, which is insufficient.
Checking for sizeof(struct smb2_preauth_neg_context) is overkill given
that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.
Discussion:
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123054-CVE-2023-54250-96bc@gregkh/T
Wiz
CVE-2023-54250 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 5.3
CVE-2023-54250 [MEDIUM] CVE-2023-54250 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2023-54250 :
Linux Debian vulnerability analysis and mitigation
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: avoid out of bounds access in decode_preauth_ctxt()
Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within
the SMB request boundary; deassemble_neg_contexts() only checks that the
eight byte smb2_neg_context header + (client controlled) DataLength are
within the packet boundary, which is insufficient.
Checking for sizeof(struct smb2_preauth_neg_context) is overkill given
that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.
Source : NVD
Published December 30, 2025
CNA Score N/A
Affected Technologies
Linux Debian
Linux Ubuntu
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
2025-12-30
Published