| 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-2023-52915: media: dvb-usb-v2: af9035: Fix null-ptr-deref in af9035_i2c_master_xfer |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| media: dvb-usb-v2: af9035: Fix null-ptr-deref in af9035_i2c_master_xfer |
| |
| In af9035_i2c_master_xfer, msg is controlled by user. When msg[i].buf |
| is null and msg[i].len is zero, former checks on msg[i].buf would be |
| passed. Malicious data finally reach af9035_i2c_master_xfer. If accessing |
| msg[i].buf[0] without sanity check, null ptr deref would happen. |
| We add check on msg[i].len to prevent crash. |
| |
| Similar commit: |
| commit 0ed554fd769a |
| ("media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()") |
| |
| The Linux kernel CVE team has assigned CVE-2023-52915 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.14.326 with commit b2f54ed7739dfdf42c4df0a11131aad7c8635464 |
| Fixed in 4.19.295 with commit fa58d9db5cad4bb7bb694b6837e3b96d87554f2b |
| Fixed in 5.4.257 with commit b49c6e5dd236787f13a062ec528d724169f11152 |
| Fixed in 5.10.197 with commit 6c01ef65de0b321b2db1ef9abf8f1d15862b937e |
| Fixed in 5.15.133 with commit d9ef84a7c222497ecb5fdf93361c76931804825e |
| Fixed in 6.1.55 with commit 0143f282b15f7cedc0392ea10050fb6000fd16e6 |
| Fixed in 6.5.5 with commit 41b7181a40af84448a2b144fb02d8bf32b7e9a23 |
| Fixed in 6.6 with commit 7bf744f2de0a848fb1d717f5831b03db96feae89 |
| |
| 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-2023-52915 |
| 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: |
| drivers/media/usb/dvb-usb-v2/af9035.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/b2f54ed7739dfdf42c4df0a11131aad7c8635464 |
| https://git.kernel.org/stable/c/fa58d9db5cad4bb7bb694b6837e3b96d87554f2b |
| https://git.kernel.org/stable/c/b49c6e5dd236787f13a062ec528d724169f11152 |
| https://git.kernel.org/stable/c/6c01ef65de0b321b2db1ef9abf8f1d15862b937e |
| https://git.kernel.org/stable/c/d9ef84a7c222497ecb5fdf93361c76931804825e |
| https://git.kernel.org/stable/c/0143f282b15f7cedc0392ea10050fb6000fd16e6 |
| https://git.kernel.org/stable/c/41b7181a40af84448a2b144fb02d8bf32b7e9a23 |
| https://git.kernel.org/stable/c/7bf744f2de0a848fb1d717f5831b03db96feae89 |
