| 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-2024-47743: KEYS: prevent NULL pointer dereference in find_asymmetric_key() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| KEYS: prevent NULL pointer dereference in find_asymmetric_key() |
| |
| In find_asymmetric_key(), if all NULLs are passed in the id_{0,1,2} |
| arguments, the kernel will first emit WARN but then have an oops |
| because id_2 gets dereferenced anyway. |
| |
| Add the missing id_2 check and move WARN_ON() to the final else branch |
| to avoid duplicate NULL checks. |
| |
| Found by Linux Verification Center (linuxtesting.org) with Svace static |
| analysis tool. |
| |
| The Linux kernel CVE team has assigned CVE-2024-47743 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.17 with commit 7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 and fixed in 6.1.113 with commit 3322fa8f2aa40b0b3651034cd541647a600cc6c0 |
| Issue introduced in 5.17 with commit 7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 and fixed in 6.6.54 with commit a3765b497a4f5224cb2f7a6a2d3357d3066214ee |
| Issue introduced in 5.17 with commit 7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 and fixed in 6.10.13 with commit 13b5b401ead95b5d8266f64904086c55b6024900 |
| Issue introduced in 5.17 with commit 7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 and fixed in 6.11.2 with commit 0d3b0706ada15c333e6f9faf19590ff715e45d1e |
| Issue introduced in 5.17 with commit 7d30198ee24f2ddcc4fefcd38a9b76bd8ab31360 and fixed in 6.12 with commit 70fd1966c93bf3bfe3fe6d753eb3d83a76597eef |
| |
| 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-2024-47743 |
| 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: |
| crypto/asymmetric_keys/asymmetric_type.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/3322fa8f2aa40b0b3651034cd541647a600cc6c0 |
| https://git.kernel.org/stable/c/a3765b497a4f5224cb2f7a6a2d3357d3066214ee |
| https://git.kernel.org/stable/c/13b5b401ead95b5d8266f64904086c55b6024900 |
| https://git.kernel.org/stable/c/0d3b0706ada15c333e6f9faf19590ff715e45d1e |
| https://git.kernel.org/stable/c/70fd1966c93bf3bfe3fe6d753eb3d83a76597eef |
