| 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-2023-52832: wifi: mac80211: don't return unset power in ieee80211_get_tx_power() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| wifi: mac80211: don't return unset power in ieee80211_get_tx_power() |
| |
| We can get a UBSAN warning if ieee80211_get_tx_power() returns the |
| INT_MIN value mac80211 internally uses for "unset power level". |
| |
| UBSAN: signed-integer-overflow in net/wireless/nl80211.c:3816:5 |
| -2147483648 * 100 cannot be represented in type 'int' |
| CPU: 0 PID: 20433 Comm: insmod Tainted: G WC OE |
| Call Trace: |
| dump_stack+0x74/0x92 |
| ubsan_epilogue+0x9/0x50 |
| handle_overflow+0x8d/0xd0 |
| __ubsan_handle_mul_overflow+0xe/0x10 |
| nl80211_send_iface+0x688/0x6b0 [cfg80211] |
| [...] |
| cfg80211_register_wdev+0x78/0xb0 [cfg80211] |
| cfg80211_netdev_notifier_call+0x200/0x620 [cfg80211] |
| [...] |
| ieee80211_if_add+0x60e/0x8f0 [mac80211] |
| ieee80211_register_hw+0xda5/0x1170 [mac80211] |
| |
| In this case, simply return an error instead, to indicate |
| that no data is available. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52832 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.14.331 with commit 1571120c44dbe5757aee1612c5b6097cdc42710f |
| Fixed in 4.19.300 with commit 298e767362cade639b7121ecb3cc5345b6529f62 |
| Fixed in 5.4.262 with commit efeae5f4972f75d50002bc50eb112ab9e7069b18 |
| Fixed in 5.10.202 with commit 717de20abdcd1d4993fa450e28b8086a352620ea |
| Fixed in 5.15.140 with commit 21a0f310a9f3bfd2b4cf4f382430e638607db846 |
| Fixed in 6.1.64 with commit 2be24c47ac19bf639c48c082486c08888bd603c6 |
| Fixed in 6.5.13 with commit adc2474d823fe81d8da759207f4f1d3691aa775a |
| Fixed in 6.6.3 with commit 5a94cffe90e20e8fade0b9abd4370bd671fe87c7 |
| Fixed in 6.7 with commit e160ab85166e77347d0cbe5149045cb25e83937f |
| |
| 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-2023-52832 |
| 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/mac80211/cfg.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/1571120c44dbe5757aee1612c5b6097cdc42710f |
| https://git.kernel.org/stable/c/298e767362cade639b7121ecb3cc5345b6529f62 |
| https://git.kernel.org/stable/c/efeae5f4972f75d50002bc50eb112ab9e7069b18 |
| https://git.kernel.org/stable/c/717de20abdcd1d4993fa450e28b8086a352620ea |
| https://git.kernel.org/stable/c/21a0f310a9f3bfd2b4cf4f382430e638607db846 |
| https://git.kernel.org/stable/c/2be24c47ac19bf639c48c082486c08888bd603c6 |
| https://git.kernel.org/stable/c/adc2474d823fe81d8da759207f4f1d3691aa775a |
| https://git.kernel.org/stable/c/5a94cffe90e20e8fade0b9abd4370bd671fe87c7 |
| https://git.kernel.org/stable/c/e160ab85166e77347d0cbe5149045cb25e83937f |
