| 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-2022-49498: ALSA: pcm: Check for null pointer of pointer substream before dereferencing it |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ALSA: pcm: Check for null pointer of pointer substream before dereferencing it |
| |
| Pointer substream is being dereferenced on the assignment of pointer card |
| before substream is being null checked with the macro PCM_RUNTIME_CHECK. |
| Although PCM_RUNTIME_CHECK calls BUG_ON, it still is useful to perform the |
| the pointer check before card is assigned. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49498 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.6 with commit d4cfb30fce03093ad944e0b44bd8f40bdad5330e and fixed in 5.10.121 with commit f2c68c52898f623fe84518da4606538d193b0cca |
| Issue introduced in 5.6 with commit d4cfb30fce03093ad944e0b44bd8f40bdad5330e and fixed in 5.15.46 with commit 7784d22f81a29df2ec57ca90d54f93a35cbcd1a2 |
| Issue introduced in 5.6 with commit d4cfb30fce03093ad944e0b44bd8f40bdad5330e and fixed in 5.17.14 with commit 1f2e28857be1e5c7db39bbc221332215fc5467e3 |
| Issue introduced in 5.6 with commit d4cfb30fce03093ad944e0b44bd8f40bdad5330e and fixed in 5.18.3 with commit b41ef7ad9238c22aa2e142f5ce4ce1a1a0d48123 |
| Issue introduced in 5.6 with commit d4cfb30fce03093ad944e0b44bd8f40bdad5330e and fixed in 5.19 with commit 011b559be832194f992f73d6c0d5485f5925a10b |
| |
| 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-2022-49498 |
| 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: |
| sound/core/pcm_memory.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/b2421a196cb0911ea95aec1050a0b830464c8fa6 |
| https://git.kernel.org/stable/c/f2c68c52898f623fe84518da4606538d193b0cca |
| https://git.kernel.org/stable/c/7784d22f81a29df2ec57ca90d54f93a35cbcd1a2 |
| https://git.kernel.org/stable/c/1f2e28857be1e5c7db39bbc221332215fc5467e3 |
| https://git.kernel.org/stable/c/b41ef7ad9238c22aa2e142f5ce4ce1a1a0d48123 |
| https://git.kernel.org/stable/c/011b559be832194f992f73d6c0d5485f5925a10b |
