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TI-2009-01549 Aliases CVE-2009-1633GHSA-r7qx-6x2x-phmm

Multiple buffer overflows in the cifs subsystem in the Linux kernel before 2.6.29.4 allow…

Priority LOW 37CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Medium
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Complete
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

Multiple buffer overflows in the cifs subsystem in the Linux kernel before 2.6.29.4 allow remote CIFS servers to cause a denial of service (memory corruption) and possibly have unspecified other impact via (1) a malformed Unicode string, related to Unicode string area alignment in fs/cifs/sess.c; or (2) long Unicode characters, related to fs/cifs/cifssmb.c and the cifs_readdir function in fs/cifs/readdir.c.

Why it matters now

EPSS 0.03034 87th percentileScored 2026-11-07
Fix Fixed Red Hat: 3 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 2.6.29.4VulnerableLinux
cpe:2.3:o:debian:debian_linux:4.0:*:*:*:*:*:*:*4.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:*5.0VulnerableDebian
cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:lts:*:*:*6.06VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:lts:*:*:*8.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:8.10:*:*:*:*:*:*:*8.10VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:9.04:*:*:*:*:*:*:*9.04VulnerableCanonical
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 2.6.29.4 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Debian
  • cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:lts:*:*:* Versions 6.06 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:lts:*:*:* Versions 8.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:8.10:*:*:*:*:*:*:* Versions 8.10 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:9.04:*:*:*:*:*:*:* Versions 9.04 Vulnerable ·Canonical

Remediation

Red Hat 3 advisories

  • RHSA-2009:1211 Released 2009-08-13 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux AS version 4 kernel-2.6.9-89.0.7.EL, kernel-2.6.9-89.0.7.EL.ia64, kernel-2.6.9-89.0.7.EL.ppc64iseries +14
    • Red Hat Enterprise Linux Desktop version 4 kernel-2.6.9-89.0.7.EL, kernel-devel-2.6.9-89.0.7.EL, kernel-doc-2.6.9-89.0.7.EL +8
    • Red Hat Enterprise Linux ES version 4 kernel-2.6.9-89.0.7.EL, kernel-2.6.9-89.0.7.EL.ia64, kernel-devel-2.6.9-89.0.7.EL +12
    • Red Hat Enterprise Linux WS version 4 kernel-2.6.9-89.0.7.EL, kernel-2.6.9-89.0.7.EL.ia64, kernel-devel-2.6.9-89.0.7.EL +12
  • RHSA-2009:1157 Released 2009-07-14 · Red Hat rating Important
    kernel-rt security and bug fix update
    • MRG Realtime for RHEL 5 Server kernel-rt-2.6.24.7-126.el5rt, kernel-rt-debug-2.6.24.7-126.el5rt, kernel-rt-debug-devel-2.6.24.7-126.el5rt +6
  • RHSA-2009:1106 Released 2009-06-16 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux (v. 5 server) kernel-2.6.18-128.1.14.el5, kernel-2.6.18-128.1.14.el5.ia64, kernel-PAE-2.6.18-128.1.14.el5 +18
    • Red Hat Enterprise Linux Desktop (v. 5 client) kernel-2.6.18-128.1.14.el5, kernel-PAE-2.6.18-128.1.14.el5, kernel-PAE-devel-2.6.18-128.1.14.el5 +8

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
MRG Realtime for RHEL 5 ServerFixed RHSA-2009:1157
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2009:1106
Red Hat Enterprise Linux AS version 4Fixed RHSA-2009:1211
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2009:1106
Red Hat Enterprise Linux Desktop version 4Fixed RHSA-2009:1211
Red Hat Enterprise Linux ES version 4Fixed RHSA-2009:1211
Red Hat Enterprise Linux WS version 4Fixed RHSA-2009:1211

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-1633
  2. 2026-10-03 Alias added: GHSA-r7qx-6x2x-phmm

References

Patch 5

Advisory 17

Other 4

Sources

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