| 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-2024-26622: tomoyo: fix UAF write bug in tomoyo_write_control() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| tomoyo: fix UAF write bug in tomoyo_write_control() |
| |
| Since tomoyo_write_control() updates head->write_buf when write() |
| of long lines is requested, we need to fetch head->write_buf after |
| head->io_sem is held. Otherwise, concurrent write() requests can |
| cause use-after-free-write and double-free problems. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26622 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.1 with commit bd03a3e4c9a9df0c6b007045fa7fc8889111a478 and fixed in 5.10.212 with commit a23ac1788e2c828c097119e9a3178f0b7e503fee |
| Issue introduced in 3.1 with commit bd03a3e4c9a9df0c6b007045fa7fc8889111a478 and fixed in 5.15.151 with commit 7d930a4da17958f869ef679ee0e4a8729337affc |
| Issue introduced in 3.1 with commit bd03a3e4c9a9df0c6b007045fa7fc8889111a478 and fixed in 6.1.81 with commit 3bfe04c1273d30b866f4c7c238331ed3b08e5824 |
| Issue introduced in 3.1 with commit bd03a3e4c9a9df0c6b007045fa7fc8889111a478 and fixed in 6.6.21 with commit 2caa605079488da9601099fbda460cfc1702839f |
| Issue introduced in 3.1 with commit bd03a3e4c9a9df0c6b007045fa7fc8889111a478 and fixed in 6.7.9 with commit 6edefe1b6c29a9932f558a898968a9fcbeec5711 |
| Issue introduced in 3.1 with commit bd03a3e4c9a9df0c6b007045fa7fc8889111a478 and fixed in 6.8 with commit 2f03fc340cac9ea1dc63cbf8c93dd2eb0f227815 |
| |
| 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-2024-26622 |
| 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/tomoyo/common.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/a23ac1788e2c828c097119e9a3178f0b7e503fee |
| https://git.kernel.org/stable/c/7d930a4da17958f869ef679ee0e4a8729337affc |
| https://git.kernel.org/stable/c/3bfe04c1273d30b866f4c7c238331ed3b08e5824 |
| https://git.kernel.org/stable/c/2caa605079488da9601099fbda460cfc1702839f |
| https://git.kernel.org/stable/c/6edefe1b6c29a9932f558a898968a9fcbeec5711 |
| https://git.kernel.org/stable/c/2f03fc340cac9ea1dc63cbf8c93dd2eb0f227815 |
