| 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-2024-27011: netfilter: nf_tables: fix memleak in map from abort path |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| netfilter: nf_tables: fix memleak in map from abort path |
| |
| The delete set command does not rely on the transaction object for |
| element removal, therefore, a combination of delete element + delete set |
| from the abort path could result in restoring twice the refcount of the |
| mapping. |
| |
| Check for inactive element in the next generation for the delete element |
| command in the abort path, skip restoring state if next generation bit |
| has been already cleared. This is similar to the activate logic using |
| the set walk iterator. |
| |
| [ 6170.286929] ------------[ cut here ]------------ |
| [ 6170.286939] WARNING: CPU: 6 PID: 790302 at net/netfilter/nf_tables_api.c:2086 nf_tables_chain_destroy+0x1f7/0x220 [nf_tables] |
| [ 6170.287071] Modules linked in: [...] |
| [ 6170.287633] CPU: 6 PID: 790302 Comm: kworker/6:2 Not tainted 6.9.0-rc3+ #365 |
| [ 6170.287768] RIP: 0010:nf_tables_chain_destroy+0x1f7/0x220 [nf_tables] |
| [ 6170.287886] Code: df 48 8d 7d 58 e8 69 2e 3b df 48 8b 7d 58 e8 80 1b 37 df 48 8d 7d 68 e8 57 2e 3b df 48 8b 7d 68 e8 6e 1b 37 df 48 89 ef eb c4 <0f> 0b 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 0f |
| [ 6170.287895] RSP: 0018:ffff888134b8fd08 EFLAGS: 00010202 |
| [ 6170.287904] RAX: 0000000000000001 RBX: ffff888125bffb28 RCX: dffffc0000000000 |
| [ 6170.287912] RDX: 0000000000000003 RSI: ffffffffa20298ab RDI: ffff88811ebe4750 |
| [ 6170.287919] RBP: ffff88811ebe4700 R08: ffff88838e812650 R09: fffffbfff0623a55 |
| [ 6170.287926] R10: ffffffff8311d2af R11: 0000000000000001 R12: ffff888125bffb10 |
| [ 6170.287933] R13: ffff888125bffb10 R14: dead000000000122 R15: dead000000000100 |
| [ 6170.287940] FS: 0000000000000000(0000) GS:ffff888390b00000(0000) knlGS:0000000000000000 |
| [ 6170.287948] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 |
| [ 6170.287955] CR2: 00007fd31fc00710 CR3: 0000000133f60004 CR4: 00000000001706f0 |
| [ 6170.287962] Call Trace: |
| [ 6170.287967] <TASK> |
| [ 6170.287973] ? __warn+0x9f/0x1a0 |
| [ 6170.287986] ? nf_tables_chain_destroy+0x1f7/0x220 [nf_tables] |
| [ 6170.288092] ? report_bug+0x1b1/0x1e0 |
| [ 6170.287986] ? nf_tables_chain_destroy+0x1f7/0x220 [nf_tables] |
| [ 6170.288092] ? report_bug+0x1b1/0x1e0 |
| [ 6170.288104] ? handle_bug+0x3c/0x70 |
| [ 6170.288112] ? exc_invalid_op+0x17/0x40 |
| [ 6170.288120] ? asm_exc_invalid_op+0x1a/0x20 |
| [ 6170.288132] ? nf_tables_chain_destroy+0x2b/0x220 [nf_tables] |
| [ 6170.288243] ? nf_tables_chain_destroy+0x1f7/0x220 [nf_tables] |
| [ 6170.288366] ? nf_tables_chain_destroy+0x2b/0x220 [nf_tables] |
| [ 6170.288483] nf_tables_trans_destroy_work+0x588/0x590 [nf_tables] |
| |
| The Linux kernel CVE team has assigned CVE-2024-27011 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.12 with commit 591054469b3eef34bc097c30fae8ededddf8d796 and fixed in 6.6.55 with commit a1bd2a38a1c6388fc8556816dc203c3e9dc52237 |
| Issue introduced in 4.12 with commit 591054469b3eef34bc097c30fae8ededddf8d796 and fixed in 6.8.8 with commit 49d0e656d19dfb2d4d7c230e4a720d37b3decff6 |
| Issue introduced in 4.12 with commit 591054469b3eef34bc097c30fae8ededddf8d796 and fixed in 6.9 with commit 86a1471d7cde792941109b93b558b5dc078b9ee9 |
| |
| 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-2024-27011 |
| 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: |
| net/netfilter/nf_tables_api.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/a1bd2a38a1c6388fc8556816dc203c3e9dc52237 |
| https://git.kernel.org/stable/c/49d0e656d19dfb2d4d7c230e4a720d37b3decff6 |
| https://git.kernel.org/stable/c/86a1471d7cde792941109b93b558b5dc078b9ee9 |
