| 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-2024-26583: tls: fix race between async notify and socket close |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| tls: fix race between async notify and socket close |
| |
| The submitting thread (one which called recvmsg/sendmsg) |
| may exit as soon as the async crypto handler calls complete() |
| so any code past that point risks touching already freed data. |
| |
| Try to avoid the locking and extra flags altogether. |
| Have the main thread hold an extra reference, this way |
| we can depend solely on the atomic ref counter for |
| synchronization. |
| |
| Don't futz with reiniting the completion, either, we are now |
| tightly controlling when completion fires. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26583 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.7 with commit 0cada33241d9de205522e3858b18e506ca5cce2c and fixed in 5.15.160 with commit f17d21ea73918ace8afb9c2d8e734dbf71c2c9d7 |
| Issue introduced in 5.7 with commit 0cada33241d9de205522e3858b18e506ca5cce2c and fixed in 6.1.79 with commit 7a3ca06d04d589deec81f56229a9a9d62352ce01 |
| Issue introduced in 5.7 with commit 0cada33241d9de205522e3858b18e506ca5cce2c and fixed in 6.6.18 with commit 86dc27ee36f558fe223dbdfbfcb6856247356f4a |
| Issue introduced in 5.7 with commit 0cada33241d9de205522e3858b18e506ca5cce2c and fixed in 6.7.6 with commit 6209319b2efdd8524691187ee99c40637558fa33 |
| Issue introduced in 5.7 with commit 0cada33241d9de205522e3858b18e506ca5cce2c and fixed in 6.8 with commit aec7961916f3f9e88766e2688992da6980f11b8d |
| Issue introduced in 5.4.44 with commit cf4cc95a15f599560c7abd89095a7973a4b9cec3 |
| Issue introduced in 5.6.16 with commit 9b81d43da15e56ed89f083f326561acdcaf549ce |
| |
| 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-2024-26583 |
| 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: |
| include/net/tls.h |
| net/tls/tls_sw.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/f17d21ea73918ace8afb9c2d8e734dbf71c2c9d7 |
| https://git.kernel.org/stable/c/7a3ca06d04d589deec81f56229a9a9d62352ce01 |
| https://git.kernel.org/stable/c/86dc27ee36f558fe223dbdfbfcb6856247356f4a |
| https://git.kernel.org/stable/c/6209319b2efdd8524691187ee99c40637558fa33 |
| https://git.kernel.org/stable/c/aec7961916f3f9e88766e2688992da6980f11b8d |
