| 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-2021-46991: i40e: Fix use-after-free in i40e_client_subtask() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| i40e: Fix use-after-free in i40e_client_subtask() |
| |
| Currently the call to i40e_client_del_instance frees the object |
| pf->cinst, however pf->cinst->lan_info is being accessed after |
| the free. Fix this by adding the missing return. |
| |
| Addresses-Coverity: ("Read from pointer after free") |
| |
| The Linux kernel CVE team has assigned CVE-2021-46991 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.16 with commit 7b0b1a6d0ac983ce1928432285d0222d4fb7c38b and fixed in 4.19.191 with commit c1322eaeb8af0d8985b5cc5fa759140fa0e57b84 |
| Issue introduced in 4.16 with commit 7b0b1a6d0ac983ce1928432285d0222d4fb7c38b and fixed in 5.4.120 with commit d718c15a2bf9ae082d5ae4d177fb19ef23cb4132 |
| Issue introduced in 4.16 with commit 7b0b1a6d0ac983ce1928432285d0222d4fb7c38b and fixed in 5.10.38 with commit 829a713450b8fb127cbabfc1244c1d8179ec5107 |
| Issue introduced in 4.16 with commit 7b0b1a6d0ac983ce1928432285d0222d4fb7c38b and fixed in 5.11.22 with commit 4ebc10aa7cd17fd9857dedac69600465c9dd16d1 |
| Issue introduced in 4.16 with commit 7b0b1a6d0ac983ce1928432285d0222d4fb7c38b and fixed in 5.12.5 with commit 1fd5d262e7442192ac7611ff1597a36c5b044323 |
| Issue introduced in 4.16 with commit 7b0b1a6d0ac983ce1928432285d0222d4fb7c38b and fixed in 5.13 with commit 38318f23a7ef86a8b1862e5e8078c4de121960c3 |
| |
| 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-2021-46991 |
| 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/i40e/i40e_client.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/c1322eaeb8af0d8985b5cc5fa759140fa0e57b84 |
| https://git.kernel.org/stable/c/d718c15a2bf9ae082d5ae4d177fb19ef23cb4132 |
| https://git.kernel.org/stable/c/829a713450b8fb127cbabfc1244c1d8179ec5107 |
| https://git.kernel.org/stable/c/4ebc10aa7cd17fd9857dedac69600465c9dd16d1 |
| https://git.kernel.org/stable/c/1fd5d262e7442192ac7611ff1597a36c5b044323 |
| https://git.kernel.org/stable/c/38318f23a7ef86a8b1862e5e8078c4de121960c3 |
