| 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-2024-26602: sched/membarrier: reduce the ability to hammer on sys_membarrier |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| sched/membarrier: reduce the ability to hammer on sys_membarrier |
| |
| On some systems, sys_membarrier can be very expensive, causing overall |
| slowdowns for everything. So put a lock on the path in order to |
| serialize the accesses to prevent the ability for this to be called at |
| too high of a frequency and saturate the machine. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26602 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.14 with commit 22e4ebb975822833b083533035233d128b30e98f and fixed in 4.19.307 with commit 3cd139875e9a7688b3fc715264032620812a5fa3 |
| Issue introduced in 4.14 with commit 22e4ebb975822833b083533035233d128b30e98f and fixed in 5.4.269 with commit 2441a64070b85c14eecc3728cc87e883f953f265 |
| Issue introduced in 4.14 with commit 22e4ebb975822833b083533035233d128b30e98f and fixed in 5.10.210 with commit db896bbe4a9c67cee377e5f6a743350d3ae4acf6 |
| Issue introduced in 4.14 with commit 22e4ebb975822833b083533035233d128b30e98f and fixed in 5.15.149 with commit 50fb4e17df319bb33be6f14e2a856950c1577dee |
| Issue introduced in 4.14 with commit 22e4ebb975822833b083533035233d128b30e98f and fixed in 6.1.79 with commit 24ec7504a08a67247fbe798d1de995208a8c128a |
| Issue introduced in 4.14 with commit 22e4ebb975822833b083533035233d128b30e98f and fixed in 6.6.18 with commit b6a2a9cbb67545c825ec95f06adb7ff300a2ad71 |
| Issue introduced in 4.14 with commit 22e4ebb975822833b083533035233d128b30e98f and fixed in 6.7.6 with commit c5b2063c65d05e79fad8029324581d86cfba7eea |
| Issue introduced in 4.14 with commit 22e4ebb975822833b083533035233d128b30e98f and fixed in 6.8 with commit 944d5fe50f3f03daacfea16300e656a1691c4a23 |
| |
| 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-2024-26602 |
| 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: |
| kernel/sched/membarrier.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/3cd139875e9a7688b3fc715264032620812a5fa3 |
| https://git.kernel.org/stable/c/2441a64070b85c14eecc3728cc87e883f953f265 |
| https://git.kernel.org/stable/c/db896bbe4a9c67cee377e5f6a743350d3ae4acf6 |
| https://git.kernel.org/stable/c/50fb4e17df319bb33be6f14e2a856950c1577dee |
| https://git.kernel.org/stable/c/24ec7504a08a67247fbe798d1de995208a8c128a |
| https://git.kernel.org/stable/c/b6a2a9cbb67545c825ec95f06adb7ff300a2ad71 |
| https://git.kernel.org/stable/c/c5b2063c65d05e79fad8029324581d86cfba7eea |
| https://git.kernel.org/stable/c/944d5fe50f3f03daacfea16300e656a1691c4a23 |
