| 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-2024-50005: mac802154: Fix potential RCU dereference issue in mac802154_scan_worker |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mac802154: Fix potential RCU dereference issue in mac802154_scan_worker |
| |
| In the `mac802154_scan_worker` function, the `scan_req->type` field was |
| accessed after the RCU read-side critical section was unlocked. According |
| to RCU usage rules, this is illegal and can lead to unpredictable |
| behavior, such as accessing memory that has been updated or causing |
| use-after-free issues. |
| |
| This possible bug was identified using a static analysis tool developed |
| by myself, specifically designed to detect RCU-related issues. |
| |
| To address this, the `scan_req->type` value is now stored in a local |
| variable `scan_req_type` while still within the RCU read-side critical |
| section. The `scan_req_type` is then used after the RCU lock is released, |
| ensuring that the type value is safely accessed without violating RCU |
| rules. |
| |
| The Linux kernel CVE team has assigned CVE-2024-50005 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.5 with commit e2c3e6f53a7a8a00ffeed127cfd1b397c3b016f8 and fixed in 6.6.55 with commit e676e4ea76bbe7f1156d8c326b9b6753849481c2 |
| Issue introduced in 6.5 with commit e2c3e6f53a7a8a00ffeed127cfd1b397c3b016f8 and fixed in 6.10.14 with commit 540138377b22f601f06f55ebfa3ca171dcab471a |
| Issue introduced in 6.5 with commit e2c3e6f53a7a8a00ffeed127cfd1b397c3b016f8 and fixed in 6.11.3 with commit d18f669461811dfe2915d5554ab2a9834f810013 |
| Issue introduced in 6.5 with commit e2c3e6f53a7a8a00ffeed127cfd1b397c3b016f8 and fixed in 6.12 with commit bff1709b3980bd7f80be6786f64cc9a9ee9e56da |
| |
| 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-2024-50005 |
| 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: |
| net/mac802154/scan.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/e676e4ea76bbe7f1156d8c326b9b6753849481c2 |
| https://git.kernel.org/stable/c/540138377b22f601f06f55ebfa3ca171dcab471a |
| https://git.kernel.org/stable/c/d18f669461811dfe2915d5554ab2a9834f810013 |
| https://git.kernel.org/stable/c/bff1709b3980bd7f80be6786f64cc9a9ee9e56da |
