| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-39494: ima: Fix use-after-free on a dentry's dname.name |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ima: Fix use-after-free on a dentry's dname.name |
| |
| ->d_name.name can change on rename and the earlier value can be freed; |
| there are conditions sufficient to stabilize it (->d_lock on dentry, |
| ->d_lock on its parent, ->i_rwsem exclusive on the parent's inode, |
| rename_lock), but none of those are met at any of the sites. Take a stable |
| snapshot of the name instead. |
| |
| The Linux kernel CVE team has assigned CVE-2024-39494 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.7 with commit 2fe5d6def1672ae6635dd71867bf36dcfaa7434b and fixed in 5.4.291 with commit 480afcbeb7aaaa22677d3dd48ec590b441eaac1a |
| Issue introduced in 3.7 with commit 2fe5d6def1672ae6635dd71867bf36dcfaa7434b and fixed in 5.10.235 with commit edf287bc610b18d7a9c0c0c1cb2e97b9348c71bb |
| Issue introduced in 3.7 with commit 2fe5d6def1672ae6635dd71867bf36dcfaa7434b and fixed in 5.15.174 with commit 0b31e28fbd773aefb6164687e0767319b8199829 |
| Issue introduced in 3.7 with commit 2fe5d6def1672ae6635dd71867bf36dcfaa7434b and fixed in 6.1.97 with commit 7fb374981e31c193b1152ed8d3b0a95b671330d4 |
| Issue introduced in 3.7 with commit 2fe5d6def1672ae6635dd71867bf36dcfaa7434b and fixed in 6.6.35 with commit dd431c3ac1fc34a9268580dd59ad3e3c76b32a8c |
| Issue introduced in 3.7 with commit 2fe5d6def1672ae6635dd71867bf36dcfaa7434b and fixed in 6.9.6 with commit a78a6f0da57d058e2009e9958fdcef66f165208c |
| Issue introduced in 3.7 with commit 2fe5d6def1672ae6635dd71867bf36dcfaa7434b and fixed in 6.10 with commit be84f32bb2c981ca670922e047cdde1488b233de |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-39494 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| security/integrity/ima/ima_api.c |
| security/integrity/ima/ima_template_lib.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/480afcbeb7aaaa22677d3dd48ec590b441eaac1a |
| https://git.kernel.org/stable/c/edf287bc610b18d7a9c0c0c1cb2e97b9348c71bb |
| https://git.kernel.org/stable/c/0b31e28fbd773aefb6164687e0767319b8199829 |
| https://git.kernel.org/stable/c/7fb374981e31c193b1152ed8d3b0a95b671330d4 |
| https://git.kernel.org/stable/c/dd431c3ac1fc34a9268580dd59ad3e3c76b32a8c |
| https://git.kernel.org/stable/c/a78a6f0da57d058e2009e9958fdcef66f165208c |
| https://git.kernel.org/stable/c/be84f32bb2c981ca670922e047cdde1488b233de |
