CVE-2009-4895

medium

Published 2010-09-08 · Modified 2026-04-29

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CVSS v3

4.7

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

4.7

Description

Race condition in the tty_fasync function in drivers/char/tty_io.c in the Linux kernel before 2.6.32.6 allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via unknown vectors, related to the put_tty_queue and __f_setown functions. NOTE: the vulnerability was addressed in a different way in 2.6.32.9.

Predictions

Exploit likelihood

47%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

Debian Affected 1 release

Version	Status	Fixed in
5.0	Affected	—

Linux kernel Affected 1 release

Version	Status	Fixed in
—	Affected	`2.6.32.6`

Ubuntu Affected 6 releases

Version	Status	Fixed in
10.10	Affected	—
10.04	Affected	—
9.10	Affected	—
9.04	Affected	—
8.04	Affected	—
6.06	Affected	—

References

CWEs

CWE-362 CWE-476

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.