CVE-2024-42079
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().
Does this matter?
Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own.
Description
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).
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.27% probability · 19th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3429ef5f50909cee9e498c50f0c499b9397116cePatch
- https://git.kernel.org/stable/c/35264909e9d1973ab9aaa2a1b07cda70f12bb828Patch
- https://git.kernel.org/stable/c/5f6a84cfb33b34610623857bd93919dcb661e29bPatch
- https://git.kernel.org/stable/c/c3c5cfa3170c0940bc66a142859caac07d19b9d6Patch
- https://git.kernel.org/stable/c/f54f9d5368a4e92ede7dd078a62788dae3a7c6efPatch
- https://git.kernel.org/stable/c/3429ef5f50909cee9e498c50f0c499b9397116cePatch
- https://git.kernel.org/stable/c/35264909e9d1973ab9aaa2a1b07cda70f12bb828Patch
- https://git.kernel.org/stable/c/f54f9d5368a4e92ede7dd078a62788dae3a7c6efPatch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.