| 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-2021-47372: net: macb: fix use after free on rmmod |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: macb: fix use after free on rmmod |
| |
| plat_dev->dev->platform_data is released by platform_device_unregister(), |
| use of pclk and hclk is a use-after-free. Since device unregister won't |
| need a clk device we adjust the function call sequence to fix this issue. |
| |
| [ 31.261225] BUG: KASAN: use-after-free in macb_remove+0x77/0xc6 [macb_pci] |
| [ 31.275563] Freed by task 306: |
| [ 30.276782] platform_device_release+0x25/0x80 |
| |
| The Linux kernel CVE team has assigned CVE-2021-47372 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.10 with commit 83a77e9ec4150ee4acc635638f7dedd9da523a26 and fixed in 4.14.249 with commit a7d521cc726f30b8e679a6f36d04b18a8ab3c536 |
| Issue introduced in 4.10 with commit 83a77e9ec4150ee4acc635638f7dedd9da523a26 and fixed in 4.19.209 with commit 46670fb832ee80943715df618632ca13c2e96f2b |
| Issue introduced in 4.10 with commit 83a77e9ec4150ee4acc635638f7dedd9da523a26 and fixed in 5.4.150 with commit 1da750d1e2140ef43d64d17f301ff6f41b45541e |
| Issue introduced in 4.10 with commit 83a77e9ec4150ee4acc635638f7dedd9da523a26 and fixed in 5.10.70 with commit 7721221e87d25c9840d9ca6b986dbdc410d5ce2b |
| Issue introduced in 4.10 with commit 83a77e9ec4150ee4acc635638f7dedd9da523a26 and fixed in 5.14.9 with commit 4ad6f2d23b0f6ac0d3e5f3102a4256d1c86c90f5 |
| Issue introduced in 4.10 with commit 83a77e9ec4150ee4acc635638f7dedd9da523a26 and fixed in 5.15 with commit d82d5303c4c539db86588ffb5dc5b26c3f1513e8 |
| |
| 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-2021-47372 |
| 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: |
| drivers/net/ethernet/cadence/macb_pci.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/a7d521cc726f30b8e679a6f36d04b18a8ab3c536 |
| https://git.kernel.org/stable/c/46670fb832ee80943715df618632ca13c2e96f2b |
| https://git.kernel.org/stable/c/1da750d1e2140ef43d64d17f301ff6f41b45541e |
| https://git.kernel.org/stable/c/7721221e87d25c9840d9ca6b986dbdc410d5ce2b |
| https://git.kernel.org/stable/c/4ad6f2d23b0f6ac0d3e5f3102a4256d1c86c90f5 |
| https://git.kernel.org/stable/c/d82d5303c4c539db86588ffb5dc5b26c3f1513e8 |
