| 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-2024-26643: netfilter: nf_tables: mark set as dead when unbinding anonymous set with timeout |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| netfilter: nf_tables: mark set as dead when unbinding anonymous set with timeout |
| |
| While the rhashtable set gc runs asynchronously, a race allows it to |
| collect elements from anonymous sets with timeouts while it is being |
| released from the commit path. |
| |
| Mingi Cho originally reported this issue in a different path in 6.1.x |
| with a pipapo set with low timeouts which is not possible upstream since |
| 7395dfacfff6 ("netfilter: nf_tables: use timestamp to check for set |
| element timeout"). |
| |
| Fix this by setting on the dead flag for anonymous sets to skip async gc |
| in this case. |
| |
| According to 08e4c8c5919f ("netfilter: nf_tables: mark newset as dead on |
| transaction abort"), Florian plans to accelerate abort path by releasing |
| objects via workqueue, therefore, this sets on the dead flag for abort |
| path too. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26643 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.4.262 with commit bbdb3b65aa91aa0a32b212f27780b28987f2d94f and fixed in 5.4.274 with commit edcf1a3f182ecf8b6b805f0ce90570ea98c5f6bf |
| Issue introduced in 5.10.198 with commit 448be0774882f95a74fa5eb7519761152add601b and fixed in 5.10.215 with commit e2d45f467096e931044f0ab7634499879d851a5c |
| Issue introduced in 5.15.134 with commit d19e8bf3ea4114dd21fc35da21f398203d7f7df1 and fixed in 5.15.154 with commit 291cca35818bd52a407bc37ab45a15816039e363 |
| Issue introduced in 6.1.56 with commit ea3eb9f2192e4fc33b795673e56c97a21987f868 and fixed in 6.1.84 with commit 406b0241d0eb598a0b330ab20ae325537d8d8163 |
| Issue introduced in 6.5 with commit 5f68718b34a531a556f2f50300ead2862278da26 and fixed in 6.6.24 with commit b2d6f9a5b1cf968f1eaa71085ceeb09c2cb276b1 |
| Issue introduced in 6.5 with commit 5f68718b34a531a556f2f50300ead2862278da26 and fixed in 6.7.12 with commit 5224afbc30c3ca9ba23e752f0f138729b2c48dd8 |
| Issue introduced in 6.5 with commit 5f68718b34a531a556f2f50300ead2862278da26 and fixed in 6.8 with commit 552705a3650bbf46a22b1adedc1b04181490fc36 |
| Issue introduced in 6.4.11 with commit 0624f190b5742a1527cd938295caa8dc5281d4cd |
| |
| 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-2024-26643 |
| 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/d75a589bb92af1abf3b779cfcd1977ca11b27033 |
| https://git.kernel.org/stable/c/edcf1a3f182ecf8b6b805f0ce90570ea98c5f6bf |
| https://git.kernel.org/stable/c/e2d45f467096e931044f0ab7634499879d851a5c |
| https://git.kernel.org/stable/c/291cca35818bd52a407bc37ab45a15816039e363 |
| https://git.kernel.org/stable/c/406b0241d0eb598a0b330ab20ae325537d8d8163 |
| https://git.kernel.org/stable/c/b2d6f9a5b1cf968f1eaa71085ceeb09c2cb276b1 |
| https://git.kernel.org/stable/c/5224afbc30c3ca9ba23e752f0f138729b2c48dd8 |
| https://git.kernel.org/stable/c/552705a3650bbf46a22b1adedc1b04181490fc36 |
