| 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-2021-47301: igb: Fix use-after-free error during reset |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| igb: Fix use-after-free error during reset |
| |
| Cleans the next descriptor to watch (next_to_watch) when cleaning the |
| TX ring. |
| |
| Failure to do so can cause invalid memory accesses. If igb_poll() runs |
| while the controller is reset this can lead to the driver try to free |
| a skb that was already freed. |
| |
| (The crash is harder to reproduce with the igb driver, but the same |
| potential problem exists as the code is identical to igc) |
| |
| The Linux kernel CVE team has assigned CVE-2021-47301 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.12 with commit 7cc6fd4c60f267e17b0baef1580d7a6258c0a6f0 and fixed in 4.14.241 with commit d7367f781e5a9ca5df9082b15b272b55e76931f8 |
| Issue introduced in 4.12 with commit 7cc6fd4c60f267e17b0baef1580d7a6258c0a6f0 and fixed in 4.19.199 with commit d3ccb18ed5ac3283c7b31ecc685b499e580d5492 |
| Issue introduced in 4.12 with commit 7cc6fd4c60f267e17b0baef1580d7a6258c0a6f0 and fixed in 5.4.136 with commit 88e0720133d42d34851c8721cf5f289a50a8710f |
| Issue introduced in 4.12 with commit 7cc6fd4c60f267e17b0baef1580d7a6258c0a6f0 and fixed in 5.10.54 with commit f153664d8e70c11d0371341613651e1130e20240 |
| Issue introduced in 4.12 with commit 7cc6fd4c60f267e17b0baef1580d7a6258c0a6f0 and fixed in 5.13.6 with commit 8e24c12f2ff6d32fd9f057382f08e748ec97194c |
| Issue introduced in 4.12 with commit 7cc6fd4c60f267e17b0baef1580d7a6258c0a6f0 and fixed in 5.14 with commit 7b292608db23ccbbfbfa50cdb155d01725d7a52e |
| |
| 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-2021-47301 |
| 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/intel/igb/igb_main.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/d7367f781e5a9ca5df9082b15b272b55e76931f8 |
| https://git.kernel.org/stable/c/d3ccb18ed5ac3283c7b31ecc685b499e580d5492 |
| https://git.kernel.org/stable/c/88e0720133d42d34851c8721cf5f289a50a8710f |
| https://git.kernel.org/stable/c/f153664d8e70c11d0371341613651e1130e20240 |
| https://git.kernel.org/stable/c/8e24c12f2ff6d32fd9f057382f08e748ec97194c |
| https://git.kernel.org/stable/c/7b292608db23ccbbfbfa50cdb155d01725d7a52e |
