| 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-2024-50165: bpf: Preserve param->string when parsing mount options |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| bpf: Preserve param->string when parsing mount options |
| |
| In bpf_parse_param(), keep the value of param->string intact so it can |
| be freed later. Otherwise, the kmalloc area pointed to by param->string |
| will be leaked as shown below: |
| |
| unreferenced object 0xffff888118c46d20 (size 8): |
| comm "new_name", pid 12109, jiffies 4295580214 |
| hex dump (first 8 bytes): |
| 61 6e 79 00 38 c9 5c 7e any.8.\~ |
| backtrace (crc e1b7f876): |
| [<00000000c6848ac7>] kmemleak_alloc+0x4b/0x80 |
| [<00000000de9f7d00>] __kmalloc_node_track_caller_noprof+0x36e/0x4a0 |
| [<000000003e29b886>] memdup_user+0x32/0xa0 |
| [<0000000007248326>] strndup_user+0x46/0x60 |
| [<0000000035b3dd29>] __x64_sys_fsconfig+0x368/0x3d0 |
| [<0000000018657927>] x64_sys_call+0xff/0x9f0 |
| [<00000000c0cabc95>] do_syscall_64+0x3b/0xc0 |
| [<000000002f331597>] entry_SYSCALL_64_after_hwframe+0x4b/0x53 |
| |
| The Linux kernel CVE team has assigned CVE-2024-50165 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.9 with commit 6c1752e0b6ca8c7021d6da3926738d8d88f601a9 and fixed in 6.11.6 with commit 5d7a0a426540319327309035509cb768a2f5c2c4 |
| Issue introduced in 6.9 with commit 6c1752e0b6ca8c7021d6da3926738d8d88f601a9 and fixed in 6.12 with commit 1f97c03f43fadc407de5b5cb01c07755053e1c22 |
| |
| 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-2024-50165 |
| 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: |
| kernel/bpf/inode.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/5d7a0a426540319327309035509cb768a2f5c2c4 |
| https://git.kernel.org/stable/c/1f97c03f43fadc407de5b5cb01c07755053e1c22 |
