| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-39470: eventfs: Fix a possible null pointer dereference in eventfs_find_events() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| eventfs: Fix a possible null pointer dereference in eventfs_find_events() |
| |
| In function eventfs_find_events,there is a potential null pointer |
| that may be caused by calling update_events_attr which will perform |
| some operations on the members of the ei struct when ei is NULL. |
| |
| Hence,When ei->is_freed is set,return NULL directly. |
| |
| The Linux kernel CVE team has assigned CVE-2024-39470 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6.18 with commit 628adb842bd5e1c2c598534a7a022b8235289de6 and fixed in 6.6.34 with commit 5ade5fbdbbb1f023bb70730ba4d74146c8bc7eb9 |
| Issue introduced in 6.8 with commit 8186fff7ab649085e2c60d032d9a20a85af1d87c and fixed in 6.9.5 with commit 7a1b2d138189375ed1dcd7d0851118230221bd1d |
| Issue introduced in 6.8 with commit 8186fff7ab649085e2c60d032d9a20a85af1d87c and fixed in 6.10 with commit d4e9a968738bf66d3bb852dd5588d4c7afd6d7f4 |
| Issue introduced in 6.7.4 with commit 9c2ac5e0ea7899411fd900d4681890722a020735 |
| |
| 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-2024-39470 |
| 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: |
| fs/tracefs/event_inode.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/5ade5fbdbbb1f023bb70730ba4d74146c8bc7eb9 |
| https://git.kernel.org/stable/c/7a1b2d138189375ed1dcd7d0851118230221bd1d |
| https://git.kernel.org/stable/c/d4e9a968738bf66d3bb852dd5588d4c7afd6d7f4 |
