CVE-2022-49444

Summary

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

module: fix [e_shstrndx].sh_size=0 OOB access

It is trivial to craft a module to trigger OOB access in this line:

if (info->secstrings[strhdr->sh_size - 1] != '\0') {

BUG: unable to handle page fault for address: ffffc90000aa0fff PGD 100000067 P4D 100000067 PUD 100066067 PMD 10436f067 PTE 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 7 PID: 1215 Comm: insmod Not tainted 5.18.0-rc5-00007-g9bf578647087-dirty #10 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-4.fc34 04/01/2014 RIP: 0010:load_module+0x19b/0x2391

[rebased patch onto modules-next]

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxec2a29593c83ed71a7f16e3243941ebfcf75fdf6 < 09cb6663618a74fe5572a4931ecbf098832e79ecaffected
LinuxLinuxec2a29593c83ed71a7f16e3243941ebfcf75fdf6 < 921630e2e5124a04158129a8f22f4b425e61a858affected
LinuxLinuxec2a29593c83ed71a7f16e3243941ebfcf75fdf6 < 45a76414b6d8b8b39c23fea53b9d20e831ae72a0affected
LinuxLinuxec2a29593c83ed71a7f16e3243941ebfcf75fdf6 < 391e982bfa632b8315235d8be9c0a81374c6a19caffected
LinuxLinux05d891e76dde3e430c707dae7d85139794eeadbdaffected
LinuxLinuxd802672c7f00963613f289579073ac519f0d306caffected
LinuxLinux214aa69cac91a723239118bbbfe77d5654ddff6baffected
LinuxLinux5.4.110 < 5.5affected
LinuxLinux5.10.26 < 5.11affected
LinuxLinux5.11.3 < 5.12affected
LinuxLinux5.12affected
LinuxLinux0 < 5.12unaffected
LinuxLinux5.15.54 <= 5.15.*unaffected
LinuxLinux5.17.14 <= 5.17.*unaffected
LinuxLinux5.18.3 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

References