| 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-2024-41074: cachefiles: Set object to close if ondemand_id < 0 in copen |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| cachefiles: Set object to close if ondemand_id < 0 in copen |
| |
| If copen is maliciously called in the user mode, it may delete the request |
| corresponding to the random id. And the request may have not been read yet. |
| |
| Note that when the object is set to reopen, the open request will be done |
| with the still reopen state in above case. As a result, the request |
| corresponding to this object is always skipped in select_req function, so |
| the read request is never completed and blocks other process. |
| |
| Fix this issue by simply set object to close if its id < 0 in copen. |
| |
| The Linux kernel CVE team has assigned CVE-2024-41074 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.19 with commit c8383054506c77b814489c09877b5db83fd4abf2 and fixed in 6.1.101 with commit 703bea37d13e4ccdafd17ae7c4cb583752ba7663 |
| Issue introduced in 5.19 with commit c8383054506c77b814489c09877b5db83fd4abf2 and fixed in 6.6.42 with commit c32ee78fbc670e6f90989a45d340748e34cad333 |
| Issue introduced in 5.19 with commit c8383054506c77b814489c09877b5db83fd4abf2 and fixed in 6.9.11 with commit 0845c553db11c84ff53fccd59da11b6d6ece4a60 |
| Issue introduced in 5.19 with commit c8383054506c77b814489c09877b5db83fd4abf2 and fixed in 6.10 with commit 4f8703fb3482f92edcfd31661857b16fec89c2c0 |
| |
| 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-2024-41074 |
| 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/cachefiles/ondemand.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/703bea37d13e4ccdafd17ae7c4cb583752ba7663 |
| https://git.kernel.org/stable/c/c32ee78fbc670e6f90989a45d340748e34cad333 |
| https://git.kernel.org/stable/c/0845c553db11c84ff53fccd59da11b6d6ece4a60 |
| https://git.kernel.org/stable/c/4f8703fb3482f92edcfd31661857b16fec89c2c0 |
