CVE-2023-54264
published 2025-12-30CVE-2023-54264: In the Linux kernel, the following vulnerability has been resolved: fs/sysv: Null check to prevent null-ptr-deref bug sb_getblk(inode->i_sb, parent) return a…
PriorityP420low5.5
EPSS
0.18%
8.2th percentile
In the Linux kernel, the following vulnerability has been resolved:
fs/sysv: Null check to prevent null-ptr-deref bug
sb_getblk(inode->i_sb, parent) return a null ptr and taking lock on
that leads to the null-ptr-deref bug.
Affected
21 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.52-1 (bookworm) | linux 6.1.52-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= e5657933863f43cc6bb76a54d659303dafaa9e58 < e976988bc245ec3768cc0f76bed7d05488a7dd0f | e976988bc245ec3768cc0f76bed7d05488a7dd0f |
| linux | linux | >= e5657933863f43cc6bb76a54d659303dafaa9e58 < baa60c66a310c50785289b0ede6fdce8ec3219c7 | baa60c66a310c50785289b0ede6fdce8ec3219c7 |
| linux | linux | >= e5657933863f43cc6bb76a54d659303dafaa9e58 < 0a44ceba77c3267f8505dda102a59367dc24caee | 0a44ceba77c3267f8505dda102a59367dc24caee |
| linux | linux | >= e5657933863f43cc6bb76a54d659303dafaa9e58 < 7f740bc696d4617f8ee44565e8ac0d36278a1e91 | 7f740bc696d4617f8ee44565e8ac0d36278a1e91 |
| linux | linux | >= e5657933863f43cc6bb76a54d659303dafaa9e58 < afd9a31b5aa4b3747f382d44a7b03b7b5d0b7635 | afd9a31b5aa4b3747f382d44a7b03b7b5d0b7635 |
| linux | linux | >= e5657933863f43cc6bb76a54d659303dafaa9e58 < 1416eebaad80bdc85ad9f97f27242011b031e2a9 | 1416eebaad80bdc85ad9f97f27242011b031e2a9 |
| linux | linux | >= e5657933863f43cc6bb76a54d659303dafaa9e58 < e28f376dd8dfcc4e880ac101184132bc08703f6e | e28f376dd8dfcc4e880ac101184132bc08703f6e |
| linux | linux | >= e5657933863f43cc6bb76a54d659303dafaa9e58 < ea2b62f305893992156a798f665847e0663c9f41 | ea2b62f305893992156a798f665847e0663c9f41 |
| linux | linux_kernel | >= 0 < 5.10.191-1 | 5.10.191-1 |
| linux | linux_kernel | >= 0 < 6.1.52-1 | 6.1.52-1 |
| linux | linux_kernel | >= 0 < 6.4.11-1 | 6.4.11-1 |
| linux | linux_kernel | >= 0 < 6.4.11-1 | 6.4.11-1 |
| linux | linux_kernel | >= 2.6.19 < 4.14.322 | 4.14.322 |
| linux | linux_kernel | >= 4.15.0 < 4.19.291 | 4.19.291 |
| linux | linux_kernel | >= 4.20.0 < 5.4.253 | 5.4.253 |
| linux | linux_kernel | >= 5.11.0 < 5.15.126 | 5.15.126 |
| linux | linux_kernel | >= 5.16.0 < 6.1.45 | 6.1.45 |
| linux | linux_kernel | >= 5.5.0 < 5.10.190 | 5.10.190 |
| linux | linux_kernel | >= 6.2.0 < 6.4.10 | 6.4.10 |
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.
GHSA
GHSA-vrgf-cf4x-v6w6: In the Linux kernel, the following vulnerability has been resolved:
fs/sysv: Null check to prevent null-ptr-deref bug
sb_getblk(inode->i_sb, parent)
ghsa_unreviewed·2025-12-30
CVE-2023-54264 GHSA-vrgf-cf4x-v6w6: In the Linux kernel, the following vulnerability has been resolved:
fs/sysv: Null check to prevent null-ptr-deref bug
sb_getblk(inode->i_sb, parent)
In the Linux kernel, the following vulnerability has been resolved:
fs/sysv: Null check to prevent null-ptr-deref bug
sb_getblk(inode->i_sb, parent) return a null ptr and taking lock on
that leads to the null-ptr-deref bug.
OSV
fs/sysv: Null check to prevent null-ptr-deref bug
osv·2025-12-30
CVE-2023-54264 fs/sysv: Null check to prevent null-ptr-deref bug
fs/sysv: Null check to prevent null-ptr-deref bug
In the Linux kernel, the following vulnerability has been resolved:
fs/sysv: Null check to prevent null-ptr-deref bug
sb_getblk(inode->i_sb, parent) return a null ptr and taking lock on
that leads to the null-ptr-deref bug.
OSV
CVE-2023-54264: In the Linux kernel, the following vulnerability has been resolved: fs/sysv: Null check to prevent null-ptr-deref bug sb_getblk(inode->i_sb, parent) r
osv·2025-12-30
CVE-2023-54264 CVE-2023-54264: In the Linux kernel, the following vulnerability has been resolved: fs/sysv: Null check to prevent null-ptr-deref bug sb_getblk(inode->i_sb, parent) r
In the Linux kernel, the following vulnerability has been resolved: fs/sysv: Null check to prevent null-ptr-deref bug sb_getblk(inode->i_sb, parent) return a null ptr and taking lock on that leads to the null-ptr-deref bug.
Red Hat
kernel: fs/sysv: Null check to prevent null-ptr-deref bug
vendor_redhat·2025-12-30·CVSS 5.5
CVE-2023-54264 [LOW] CWE-476 kernel: fs/sysv: Null check to prevent null-ptr-deref bug
kernel: fs/sysv: Null check to prevent null-ptr-deref bug
In the Linux kernel, the following vulnerability has been resolved:
fs/sysv: Null check to prevent null-ptr-deref bug
sb_getblk(inode->i_sb, parent) return a null ptr and taking lock on
that leads to the null-ptr-deref bug.
A NULL pointer dereference vulnerability was found in the Linux kernel's System V filesystem (sysv). The code fails to check if sb_getblk() returns NULL before attempting to take a lock on the returned buffer head. When sb_getblk() fails and returns NULL, the subsequent lock operation dereferences the NULL pointer, causing a kernel crash.
Statement: This flaw affects systems mounting System V (sysv) filesystems. The NULL pointer dereference occurs when the kernel fails to allocate a buffer block during filesys
Debian
CVE-2023-54264: linux - In the Linux kernel, the following vulnerability has been resolved: fs/sysv: Nu...
vendor_debian·2023
CVE-2023-54264 CVE-2023-54264: linux - In the Linux kernel, the following vulnerability has been resolved: fs/sysv: Nu...
In the Linux kernel, the following vulnerability has been resolved: fs/sysv: Null check to prevent null-ptr-deref bug sb_getblk(inode->i_sb, parent) return a null ptr and taking lock on that leads to the null-ptr-deref bug.
Scope: local
bookworm: resolved (fixed in 6.1.52-1)
bullseye: resolved (fixed in 5.10.191-1)
forky: resolved (fixed in 6.4.11-1)
sid: resolved (fixed in 6.4.11-1)
trixie: resolved (fixed in 6.4.11-1)
No detection rules found.
No public exploits indexed.
Wiz
CVE-2023-54264 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz
CVE-2023-54264 CVE-2023-54264 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2023-54264 :
Linux Kernel vulnerability analysis and mitigation
In the Linux kernel, the following vulnerability has been resolved:
fs/sysv: Null check to prevent null-ptr-deref bug
sb_getblk(inode->i_sb, parent) return a null ptr and taking lock on
that leads to the null-ptr-deref bug.
Source : NVD
Published December 30, 2025
CNA Score N/A
Affected Technologies
Linux Kernel
Linux Debian
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 10.8
Exploitation Probability (EPSS) N/A
Affected packages and libraries
kernel-64kb-extra
linux-azure-5.4
Sources
NVD
Debian 11, 12, 13, 14 Has Fix Added at: Dec 31, 2025
Echo Has Fix Added at: Dec 31, 2025
Red Hat 6 Severity LOW No Fix Add
Bugzilla
CVE-2023-54264 kernel: fs/sysv: Null check to prevent null-ptr-deref bug
bugzilla·2025-12-30
CVE-2023-54264 [LOW] CVE-2023-54264 kernel: fs/sysv: Null check to prevent null-ptr-deref bug
CVE-2023-54264 kernel: fs/sysv: Null check to prevent null-ptr-deref bug
In the Linux kernel, the following vulnerability has been resolved:
fs/sysv: Null check to prevent null-ptr-deref bug
sb_getblk(inode->i_sb, parent) return a null ptr and taking lock on
that leads to the null-ptr-deref bug.
Discussion:
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123058-CVE-2023-54264-64bd@gregkh/T
https://git.kernel.org/stable/c/0a44ceba77c3267f8505dda102a59367dc24caeehttps://git.kernel.org/stable/c/1416eebaad80bdc85ad9f97f27242011b031e2a9https://git.kernel.org/stable/c/7f740bc696d4617f8ee44565e8ac0d36278a1e91https://git.kernel.org/stable/c/afd9a31b5aa4b3747f382d44a7b03b7b5d0b7635https://git.kernel.org/stable/c/baa60c66a310c50785289b0ede6fdce8ec3219c7https://git.kernel.org/stable/c/e28f376dd8dfcc4e880ac101184132bc08703f6ehttps://git.kernel.org/stable/c/e976988bc245ec3768cc0f76bed7d05488a7dd0fhttps://git.kernel.org/stable/c/ea2b62f305893992156a798f665847e0663c9f41
2025-12-30
Published