{"id":"CVE-2011-1021","aliases":["EUVD-2011-1038","GHSA-42f2-xvqw-p5x2","RHSA-2011:1253","UBUNTU-CVE-2011-1021"],"status":"published","title":"drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary...","description":"drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary kernel memory locations by leveraging root privileges to write to the /sys/kernel/debug/acpi/custom_method file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4347.","severity":{"version":"2.0","score":3.6,"vector":"AV:L/AC:L/Au:N/C:N/I:P/A:P","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00928,"percentile":0.60795,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-264"],"published":"2012-06-21T23:00:00Z","modified":"2026-06-28T10:05:13Z","exploits":[{"source":"exploitdb","id":"EDB-15774","title":"Linux Kernel \u003c 2.6.37-rc2 - 'ACPI custom_method' Local Privilege Escalation","type":"local","platform":"linux","date":"2010-12-18","verified":true,"url":"https://www.exploit-db.com/exploits/15774"}],"affected":[{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-debug","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-debug-debuginfo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-debug-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-debuginfo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-debuginfo-common-x86_64","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-doc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-firmware","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-trace","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-trace-debuginfo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-trace-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-vanilla","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-vanilla-debuginfo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33},{"source":"osv","ecosystem":"Red Hat:enterprise_mrg:2:server:el6","package":"kernel-rt-vanilla-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.6.33.9-rt31.75.el6rt"}]}],"bundled":33}],"products":[{"vendor":"linux","product":"linux_kernel"}],"references":[{"url":"http://www.openwall.com/lists/oss-security/2011/02/25/5","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://github.com/torvalds/linux/commit/526b4af47f44148c9d665e57723ed9f86634c6e3","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch"]},{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=526b4af47f44148c9d665e57723ed9f86634c6e3","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://ftp.osuosl.org/pub/linux/kernel/v3.0/ChangeLog-3.0","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=680841","tags":["x_refsource_CONFIRM","x_transferred","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1021","tags":["advisory"]},{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=526b4af47f44148c9d665e57723ed9f86634c6e3"},{"url":"https://github.com/advisories/GHSA-42f2-xvqw-p5x2"},{"url":"https://access.redhat.com/errata/RHSA-2011:1253","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#important","tags":["article"]},{"url":"https://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_MRG/2.0/html/Technical_Notes/index.html","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=625688","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=664914","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=680358","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=681987","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=682641","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=684671","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=691270","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=691793","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=694021","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=695173","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=695976","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=697394","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=697822","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=698057","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=698996","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=698998","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=702303","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=703011","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=703019","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=703026","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=709393","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=710158","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=710338","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=714536","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=715436","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=716538","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=716805","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=716825","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=718152","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=722557","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=728310","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=728551","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2011/rhsa-2011_1253.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2010-4243","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2010-4243","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2010-4243","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2010-4526","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2010-4526","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2010-4526","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1020","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1020","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1020","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1021","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1021","tags":["advisory","report"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1090","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1090","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1090","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1160","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1160","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1160","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1478","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1478","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1478","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1479","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1479","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1479","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1494","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1494","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1494","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1495","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1495","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1495","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1576","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1576","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1576","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1577","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1577","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1577","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1585","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1585","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1585","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1593","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1593","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1593","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1598","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1598","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1598","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1745","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1745","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1745","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1746","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1746","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1746","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1748","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1748","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1748","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1767","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1767","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1767","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1768","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1768","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1768","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1770","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1770","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1770","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-1776","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-1776","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1776","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-2022","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-2022","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2022","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-2183","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-2183","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2183","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-2213","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-2213","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2213","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-2484","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-2484","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2484","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-2491","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-2491","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2491","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-2492","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-2492","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2492","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-2495","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-2495","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2495","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-2496","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-2496","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2496","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-2497","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-2497","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2497","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-2517","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-2517","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2517","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2011-2695","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2011-2695","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2695","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2011-1021","tags":["report"]},{"url":"https://rhn.redhat.com/errata/RHSA-2011-1253.html","tags":["report"]},{"url":"https://lkml.org/lkml/2011/2/22/369","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2011-1021","description":"drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary kernel memory locations by leveraging root privileges to write to the /sys/kernel/debug/acpi/custom_method file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4347.","status":"published","published":"2012-06-21T23:00:00Z","modified":"2024-08-06T22:14:27.152Z","updated_at":"2026-11-02T14:35:38.711857Z"}],"euvd":[{"id":"EUVD-2011-1038","description":"drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary kernel memory locations by leveraging root privileges to write to the /sys/kernel/debug/acpi/custom_method file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4347.","status":"published","published":"2012-06-21T23:00:00Z","modified":"2024-08-06T22:14:27Z","updated_at":"2026-11-03T01:55:58.301107Z"}],"ghsa":[{"id":"GHSA-42f2-xvqw-p5x2","title":"drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary...","description":"drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary kernel memory locations by leveraging root privileges to write to the /sys/kernel/debug/acpi/custom_method file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4347.","status":"published","published":"2022-05-17T05:28:11Z","modified":"2023-02-13T03:30:23Z","updated_at":"2026-11-02T14:54:05.462623Z"}],"nvd":[{"id":"CVE-2011-1021","description":"drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary kernel memory locations by leveraging root privileges to write to the /sys/kernel/debug/acpi/custom_method file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4347.","status":"published","published":"2012-06-21T23:55:01.897Z","modified":"2026-06-16T23:28:34.267Z","cvss":[{"version":"2.0","score":3.6,"vector":"AV:L/AC:L/Au:N/C:N/I:P/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-264"],"updated_at":"2026-11-02T14:02:12.272092Z"}],"osv":[{"id":"RHSA-2011:1253","title":"Red Hat Security Advisory: kernel-rt security and bug fix update","status":"published","published":"2024-09-13T07:07:44Z","modified":"2026-06-28T10:05:13Z","updated_at":"2026-11-02T15:53:01.003286Z"},{"id":"UBUNTU-CVE-2011-1021","description":"drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary kernel memory locations by leveraging root privileges to write to the /sys/kernel/debug/acpi/custom_method file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4347.","status":"withdrawn","published":"2012-06-21T23:55:00Z","modified":"2025-07-16T07:30:44.186998Z","updated_at":"2026-11-02T15:54:06.395274Z"}]}}