CVE-2024-42079

Summary

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

gfs2: Fix NULL pointer dereference in gfs2_log_flush

In gfs2_jindex_free(), set sdp->sd_jdesc to NULL under the log flush lock to provide exclusion against gfs2_log_flush().

In gfs2_log_flush(), check if sdp->sd_jdesc is non-NULL before dereferencing it. Otherwise, we could run into a NULL pointer dereference when outstanding glock work races with an unmount (glock_work_func -> run_queue -> do_xmote -> inode_go_sync -> gfs2_log_flush).

Affected Software

VendorProductVersion RangeStatus
LinuxLinux82218943058d5e3fe692a38b5a549479738dab33 < c3c5cfa3170c0940bc66a142859caac07d19b9d6affected
LinuxLinux82218943058d5e3fe692a38b5a549479738dab33 < 5f6a84cfb33b34610623857bd93919dcb661e29baffected
LinuxLinux82218943058d5e3fe692a38b5a549479738dab33 < 3429ef5f50909cee9e498c50f0c499b9397116ceaffected
LinuxLinux82218943058d5e3fe692a38b5a549479738dab33 < f54f9d5368a4e92ede7dd078a62788dae3a7c6efaffected
LinuxLinux82218943058d5e3fe692a38b5a549479738dab33 < 35264909e9d1973ab9aaa2a1b07cda70f12bb828affected
LinuxLinux5.12affected
LinuxLinux0 < 5.12unaffected
LinuxLinux5.15.200 <= 5.15.*unaffected
LinuxLinux6.1.162 <= 6.1.*unaffected
LinuxLinux6.6.37 <= 6.6.*unaffected
LinuxLinux6.9.8 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References