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Fencer Vulns
low 2.1

CVE-2007-4571 json

The snd_mem_proc_read function in sound/core/memalloc.c in the Advanced Linux Sound Architecture (ALSA) in the Linux kernel before 2.6.22.8…

published 2007-09-26 19 y ago modified 2026-06-16 4 mo ago also EUVD-2007-4553

cvss
2.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits
1
Exploit-DB

Summary

The snd_mem_proc_read function in sound/core/memalloc.c in the Advanced Linux Sound Architecture (ALSA) in the Linux kernel before 2.6.22.8 does not return the correct write size, which allows local users to obtain sensitive information (kernel memory contents) via a small count argument, as demonstrated by multiple reads of /proc/driver/snd-page-alloc.

Patch / fix

  • kernel RHEL 5 2.6.18-53.1.4.el5
  • kernel-PAE RHEL 5 2.6.18-53.1.4.el5
  • kernel-xen RHEL 5 2.6.18-53.1.4.el5
  • kernel-kdump RHEL 5 2.6.18-53.1.4.el5
  • kernel-debuginfo-common RHEL 5 2.6.18-53.1.4.el5
  • kernel RHEL 4 2.6.9-55.0.12.EL
  • kernel-smp RHEL 4 2.6.9-55.0.12.EL
  • kernel-xenU RHEL 4 2.6.9-55.0.12.EL

red hat advisories RHSA-2007:0993RHSA-2007:0939

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2007-4571 updated

ALSA memory disclosure flaw

  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-53.1.4.el5, kernel-PAE 2.6.18-53.1.4.el5, kernel-xen 2.6.18-53.1.4.el5, kernel-kdump 2.6.18-53.1.4.el5, kernel-debuginfo-common 2.6.18-53.1.4.el5
    fixed: vendor fix RHSA-2007:0993
  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-55.0.12.EL, kernel-smp 2.6.9-55.0.12.EL, kernel-xenU 2.6.9-55.0.12.EL, kernel-hugemem 2.6.9-55.0.12.EL, kernel-largesmp 2.6.9-55.0.12.EL
    fixed: vendor fix RHSA-2007:0939
  • Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-53.1.4.el5, kernel-PAE 2.6.18-53.1.4.el5, kernel-xen 2.6.18-53.1.4.el5, kernel-kdump 2.6.18-53.1.4.el5, kernel-debuginfo-common 2.6.18-53.1.4.el5
    fixed: vendor fix RHSA-2007:0993
  • Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-55.0.12.EL, kernel-smp 2.6.9-55.0.12.EL, kernel-xenU 2.6.9-55.0.12.EL, kernel-hugemem 2.6.9-55.0.12.EL, kernel-largesmp 2.6.9-55.0.12.EL Red Hat Enterprise Linux ES version 4 kernel 2.6.9-55.0.12.EL, kernel-smp 2.6.9-55.0.12.EL, kernel-xenU 2.6.9-55.0.12.EL, kernel-hugemem 2.6.9-55.0.12.EL, kernel-largesmp 2.6.9-55.0.12.EL Red Hat Enterprise Linux WS version 4 kernel 2.6.9-55.0.12.EL, kernel-smp 2.6.9-55.0.12.EL, kernel-xenU 2.6.9-55.0.12.EL, kernel-hugemem 2.6.9-55.0.12.EL, kernel-largesmp 2.6.9-55.0.12.EL
    fixed: vendor fix RHSA-2007:0939
  • Red Hat Enterprise Linux (v. 5 server) kernel-headers 2.6.18-53.1.4.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel-headers 2.6.18-53.1.4.el5
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-30605)
  2. Published

Exploit prediction

0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-30605 Linux Kernel 2.6.x - ALSA snd-page-alloc Local Proc File Information Disclosure local, 2007-09-21

CVSS scores

assigned by version score vector
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.