CVE-2024-56593 — NULL Pointer Dereference in Linux

CWE-476 — NULL Pointer Dereference96 documents8 sources
Severity
5.5MEDIUMNVD
OSV8.8OSV7.8OSV4.7
EPSS
0.0%
top 99.40%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
8
LinuxLinux KernelDebian Linux+5 more
Timeline
PublishedDec 27
Latest updateApr 13

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix oops due to NULL pointer dereference in brcmf_sdiod_sglist_rw() This patch fixes a NULL pointer dereference bug in brcmfmac that occurs when a high 'sd_sgentry_align' value applies (e.g. 512) and a lot of queued SKBs are sent from the pkt queue. The problem is the number of entries in the pre-allocated sgtable, it is nents = max(rxglom_size, txglom_size) + max(rxglom_size, txglom_size) >> 4 + 1. Given the …

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages10 packages

▶NVDlinux/linux_kernel5.5 — 5.10.231+5
▶Debianlinux/linux_kernel< 5.10.234-1+3
▶Ubuntulinux/linux_kernel< 5.4.0-211.231+7

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

47
OSV
linux-azure, linux-azure-4.15 vulnerabilities↗2026-03-24
▶
OSV
linux-azure vulnerabilities↗2026-03-24
▶
OSV
linux-azure-fips vulnerabilities↗2026-03-24
▶
OSV
linux, linux-aws, linux-aws-hwe, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle vulnerabilities↗2026-03-20
▶
OSV
linux-aws-fips, linux-fips, linux-gcp-fips vulnerabilities↗2026-03-20
▶

📋Vendor Advisories

48
Ubuntu
Kernel Live Patch Security Notice↗2026-04-13
▶
Ubuntu
Linux kernel (Azure FIPS) vulnerabilities↗2026-03-24
▶
Ubuntu
Linux kernel (Azure) vulnerabilities↗2026-03-24
▶
Ubuntu
Linux kernel (Azure) vulnerabilities↗2026-03-24
▶
Ubuntu
Linux kernel (FIPS) vulnerabilities↗2026-03-20
▶