CVE-2022-49277

Summary

In the Linux kernel, the following vulnerability has been resolved:

jffs2: fix memory leak in jffs2_do_mount_fs

If jffs2_build_filesystem() in jffs2_do_mount_fs() returns an error, we can observe the following kmemleak report:

unreferenced object 0xffff88811b25a640 (size 64): comm "mount", pid 691, jiffies 4294957728 (age 71.952s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ……………. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ……………. backtrace: [<ffffffffa493be24>] kmem_cache_alloc_trace+0x584/0x880 [<ffffffffa5423a06>] jffs2_sum_init+0x86/0x130 [<ffffffffa5400e58>] jffs2_do_mount_fs+0x798/0xac0 [<ffffffffa540acf3>] jffs2_do_fill_super+0x383/0xc30 [<ffffffffa540c00a>] jffs2_fill_super+0x2ea/0x4c0 […] unreferenced object 0xffff88812c760000 (size 65536): comm "mount", pid 691, jiffies 4294957728 (age 71.952s) hex dump (first 32 bytes): bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ……………. bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ……………. backtrace: [<ffffffffa493a449>] __kmalloc+0x6b9/0x910 [<ffffffffa5423a57>] jffs2_sum_init+0xd7/0x130 [<ffffffffa5400e58>] jffs2_do_mount_fs+0x798/0xac0 [<ffffffffa540acf3>] jffs2_do_fill_super+0x383/0xc30 [<ffffffffa540c00a>] jffs2_fill_super+0x2ea/0x4c0 […]

This is because the resources allocated in jffs2_sum_init() are not released. Call jffs2_sum_exit() to release these resources to solve the problem.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe631ddba588783edd521c5a89f7b2902772fb691 < 2a9d8184458562e6bf2f40d0e677fc85e2dd3834affected
LinuxLinuxe631ddba588783edd521c5a89f7b2902772fb691 < 9a0f6610c7daedd2eace430beeb08a8b7ac80699affected
LinuxLinuxe631ddba588783edd521c5a89f7b2902772fb691 < dbe0d0521eaa6a3d235517319266c539bb5c5112affected
LinuxLinuxe631ddba588783edd521c5a89f7b2902772fb691 < 0978e9af4559a171ac7a74a1b3ef21804b0a0fa9affected
LinuxLinuxe631ddba588783edd521c5a89f7b2902772fb691 < 607d3aab7349f18e0d9dba4100d09d16fe27cacaaffected
LinuxLinuxe631ddba588783edd521c5a89f7b2902772fb691 < 4392e8aeebc5a4f8073620bccba7de1b1f6d7c88affected
LinuxLinuxe631ddba588783edd521c5a89f7b2902772fb691 < 5f34310d1376ca5b2ed798258def2c2ab3cc6699affected
LinuxLinuxe631ddba588783edd521c5a89f7b2902772fb691 < c94128470e6fe53d9bd9d16d2d3271813f9d37afaffected
LinuxLinuxe631ddba588783edd521c5a89f7b2902772fb691 < d051cef784de4d54835f6b6836d98a8f6935772caffected
LinuxLinux2.6.15affected
LinuxLinux0 < 2.6.15unaffected
LinuxLinux4.9.311 <= 4.9.*unaffected
LinuxLinux4.14.276 <= 4.14.*unaffected
LinuxLinux4.19.238 <= 4.19.*unaffected
LinuxLinux5.4.189 <= 5.4.*unaffected
LinuxLinux5.10.110 <= 5.10.*unaffected
LinuxLinux5.15.33 <= 5.15.*unaffected
LinuxLinux5.16.19 <= 5.16.*unaffected
LinuxLinux5.17.2 <= 5.17.*unaffected
LinuxLinux5.18 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References