CVE-2022-49277

/// Technical description

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 b

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References