Linux Kernel up to 6.6.13/6.7.1 loongson2_thermal PTR_ERR comparison

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 6.6.13/6.7.1. Affected by this issue is the function PTR_ERR of the component loongson2_thermal. Such manipulation leads to comparison. This vulnerability is documented as CVE-2023-52613. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.13/6.7.1 and classified as problematic. Affected by this issue is the function PTR_ERR of the component loongson2_thermal. The manipulation with an unknown input leads to a comparison vulnerability. Using CWE to declare the problem leads to CWE-697. The product compares two entities in a security-relevant context, but the comparison is incorrect, which may lead to resultant weaknesses. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: drivers/thermal/loongson2_thermal: Fix incorrect PTR_ERR() judgment PTR_ERR() returns -ENODEV when thermal-zones are undefined, and we need -ENODEV as the right value for comparison. Otherwise, tz->type is NULL when thermal-zones is undefined, resulting in the following error: [ 12.290030] CPU 1 Unable to handle kernel paging request at virtual address fffffffffffffff1, era == 900000000355f410, ra == 90000000031579b8 [ 12.302877] Oops[#1]: [ 12.305190] CPU: 1 PID: 181 Comm: systemd-udevd Not tainted 6.6.0-rc7+ #5385 [ 12.312304] pc 900000000355f410 ra 90000000031579b8 tp 90000001069e8000 sp 90000001069eba10 [ 12.320739] a0 0000000000000000 a1 fffffffffffffff1 a2 0000000000000014 a3 0000000000000001 [ 12.329173] a4 90000001069eb990 a5 0000000000000001 a6 0000000000001001 a7 900000010003431c [ 12.337606] t0 fffffffffffffff1 t1 54567fd5da9b4fd4 t2 900000010614ec40 t3 00000000000dc901 [ 12.346041] t4 0000000000000000 t5 0000000000000004 t6 900000010614ee20 t7 900000000d00b790 [ 12.354472] t8 00000000000dc901 u0 54567fd5da9b4fd4 s9 900000000402ae10 s0 900000010614ec40 [ 12.362916] s1 90000000039fced0 s2 ffffffffffffffed s3 ffffffffffffffed s4 9000000003acc000 [ 12.362931] s5 0000000000000004 s6 fffffffffffff000 s7 0000000000000490 s8 90000001028b2ec8 [ 12.362938] ra: 90000000031579b8 thermal_add_hwmon_sysfs+0x258/0x300 [ 12.386411] ERA: 900000000355f410 strscpy+0xf0/0x160 [ 12.391626] CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE) [ 12.397898] PRMD: 00000004 (PPLV0 +PIE -PWE) [ 12.403678] EUEN: 00000000 (-FPE -SXE -ASXE -BTE) [ 12.409859] ECFG: 00071c1c (LIE=2-4,10-12 VS=7) [ 12.415882] ESTAT: 00010000 [PIL] (IS= ECode=1 EsubCode=0) [ 12.415907] BADV: fffffffffffffff1 [ 12.415911] PRID: 0014a000 (Loongson-64bit, Loongson-2K1000) [ 12.415917] Modules linked in: loongson2_thermal(+) vfat fat uio_pdrv_genirq uio fuse zram zsmalloc [ 12.415950] Process systemd-udevd (pid: 181, threadinfo=00000000358b9718, task=00000000ace72fe3) [ 12.415961] Stack : 0000000000000dc0 54567fd5da9b4fd4 900000000402ae10 9000000002df9358 [ 12.415982] ffffffffffffffed 0000000000000004 9000000107a10aa8 90000001002a3410 [ 12.415999] ffffffffffffffed ffffffffffffffed 9000000107a11268 9000000003157ab0 [ 12.416016] 9000000107a10aa8 ffffff80020fc0c8 90000001002a3410 ffffffffffffffed [ 12.416032] 0000000000000024 ffffff80020cc1e8 900000000402b2a0 9000000003acc000 [ 12.416048] 90000001002a3410 0000000000000000 ffffff80020f4030 90000001002a3410 [ 12.416065] 0000000000000000 9000000002df6808 90000001002a3410 0000000000000000 [ 12.416081] ffffff80020f4030 0000000000000000 90000001002a3410 9000000002df2ba8 [ 12.416097] 00000000000000b4 90000001002a34f4 90000001002a3410 0000000000000002 [ 12.416114] ffffff80020f4030 fffffffffffffff0 90000001002a3410 9000000002df2f30 [ 12.416131] ... [ 12.416138] Call Trace: [ 12.416142] [] strscpy+0xf0/0x160 [ 12.416167] [] thermal_add_hwmon_sysfs+0x258/0x300 [ 12.416183] [] devm_thermal_add_hwmon_sysfs+0x50/0xe0 [ 12.416200] [] loongson2_thermal_probe+0x128/0x200 [loongson2_thermal] [ 12.416232] [] platform_probe+0x68/0x140 [ 12.416249] [] really_probe+0xc8/0x3c0 [ 12.416269] [] __driver_probe_device+0x90/0x180 [ 12.416286] [] driver_probe_device+0x38/0x160 [ 12.416302] [] __driver_attach+0xa8/0x200 [ 12.416314] [] bus_for_each_dev+0x8c/0x120 [ 12.416330] [] bus_add_driver+0x10c/0x2a0 [ 12.416346] [] driver_register+0x74/0x160 [ 12.416358] [] do_one_initcall+0x84/0x220 [ 12.416372] [] do_init_module+0x58/0x2c0 [ ---truncated---

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2023-52613 since 03/06/2024. The exploitation is known to be difficult. Technical details are known, but there is no available exploit.

Upgrading to version 6.6.14, 6.7.2 or 6.8 eliminates this vulnerability. Applying the patch 70481755ed77/6010a9fc14eb/15ef92e9c411 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.6.0
• 6.6.1
• 6.6.2
• 6.6.3
• 6.6.4
• 6.6.5
• 6.6.6
• 6.6.7
• 6.6.8
• 6.6.9
• 6.6.10
• 6.6.11
• 6.6.12
• 6.6.13
• 6.7.0
• 6.7.1

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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