| 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-2021-47521: can: sja1000: fix use after free in ems_pcmcia_add_card() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| can: sja1000: fix use after free in ems_pcmcia_add_card() |
| |
| If the last channel is not available then "dev" is freed. Fortunately, |
| we can just use "pdev->irq" instead. |
| |
| Also we should check if at least one channel was set up. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47521 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.2 with commit fd734c6f25aea4b2b44b045e489aec67b388577e and fixed in 4.4.295 with commit cbd86110546f7f730a1f5d7de56c944a336c15c4 |
| Issue introduced in 3.2 with commit fd734c6f25aea4b2b44b045e489aec67b388577e and fixed in 4.9.293 with commit 1dd5b819f7e406dc15bbc7670596ff25261aaa2a |
| Issue introduced in 3.2 with commit fd734c6f25aea4b2b44b045e489aec67b388577e and fixed in 4.14.258 with commit c8718026ba287168ff9ad0ccc4f9a413062cba36 |
| Issue introduced in 3.2 with commit fd734c6f25aea4b2b44b045e489aec67b388577e and fixed in 4.19.221 with commit ccf070183e4655824936c0f96c4a2bcca93419aa |
| Issue introduced in 3.2 with commit fd734c6f25aea4b2b44b045e489aec67b388577e and fixed in 5.4.165 with commit 1a295fea90e1acbe80c6d4940f5ff856edcd6bec |
| Issue introduced in 3.2 with commit fd734c6f25aea4b2b44b045e489aec67b388577e and fixed in 5.10.85 with commit 923f4dc5df679f678e121c20bf2fd70f7bf3e288 |
| Issue introduced in 3.2 with commit fd734c6f25aea4b2b44b045e489aec67b388577e and fixed in 5.15.8 with commit 474f9a8534f5f89841240a7e978bafd6e1e039ce |
| Issue introduced in 3.2 with commit fd734c6f25aea4b2b44b045e489aec67b388577e and fixed in 5.16 with commit 3ec6ca6b1a8e64389f0212b5a1b0f6fed1909e45 |
| |
| 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-2021-47521 |
| 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/can/sja1000/ems_pcmcia.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/cbd86110546f7f730a1f5d7de56c944a336c15c4 |
| https://git.kernel.org/stable/c/1dd5b819f7e406dc15bbc7670596ff25261aaa2a |
| https://git.kernel.org/stable/c/c8718026ba287168ff9ad0ccc4f9a413062cba36 |
| https://git.kernel.org/stable/c/ccf070183e4655824936c0f96c4a2bcca93419aa |
| https://git.kernel.org/stable/c/1a295fea90e1acbe80c6d4940f5ff856edcd6bec |
| https://git.kernel.org/stable/c/923f4dc5df679f678e121c20bf2fd70f7bf3e288 |
| https://git.kernel.org/stable/c/474f9a8534f5f89841240a7e978bafd6e1e039ce |
| https://git.kernel.org/stable/c/3ec6ca6b1a8e64389f0212b5a1b0f6fed1909e45 |
