HighPublic exploit

Linux Kernel elf_core_dump Buffer Overflow

IdentifiersCVE-2005-1263CWE-121

A buffer overflow in the Linux kernel ELF core-dump handling path affects elf_core_dump in binfmt_elf.c. A crafted ELF binary can cause a negative length argument associated with create_elf_tables processing to pass a signed integer comparison, resulting in a buffer overflow.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

A local attacker can execute arbitrary code by triggering the buffer overflow with a crafted ELF binary under the affected conditions.

Mitigation

If you can’t patch tonight, do this now.

Restrict local shell access to trusted users only. Use kernel hardening features such as grsecurity or SELinux to limit the impact of local privilege escalation exploits until the kernel can be patched.

Remediation

Patch, then assume compromise.

Upgrade to a patched version of the Linux kernel where the signed integer comparison and buffer handling in elf_core_dump have been corrected. Apply vendor-supplied patches as soon as possible.

PUBLIC EXPLOITS

Exploits

1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).

VALID 1 / 2 TOTALView more in app

2005MaturityOperationalVerified exploit

This six-file repository archives two historical Linux kernel local exploit implementations, with per-CVE README files and a top-level index. CVE-2005-0736/1397.c is a standalone C exploit for the sys_epoll_wait integer-overflow condition on Linux 2.6.5-2.6.11. It detects CPU capabilities via /proc/cpuinfo, accepts PAE/PSE, page-allocation, exploit-path, and thread-stack-size tuning options, modifies low kernel memory/IDT state, and attempts to obtain a root /bin/sh shell. CVE-2005-1263/25647.sh is a Bash wrapper that emits, compiles, and runs two i386 C programs plus a custom linker script to construct a malformed ELF and repeatedly induce coredumps, warning that it can crash the host. The latter is a destructive trigger PoC and does not include a reliable post-exploitation root-shell payload. No exploit framework or network communications are present; URLs are documentary references only.

0b0111100Disclosed Sep 7, 2026cbashlocal

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

LinuxLinux Kerneloperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

No public activity tracked yet. Mallory keeps watching.

0 SOURCESView more in app

No public activity observed for this vulnerability.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity