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THREAT OPS › Threat News › [NVD] CVE-2026-63804 (HIGH 7.8) — In the Linux kernel, the following vulnerability has been resolved: gfs2: fix use-after-free in gfs2_qd_dealloc gfs2_qd_dealloc(), called as an RCU callback from gfs2_qd_dispose(), accesses the superblock object sdp through qd->qd_sbd after freeing qd. It does so to decrement s

[NVD] CVE-2026-63804 (HIGH 7.8) — In the Linux kernel, the following vulnerability has been resolved: gfs2: fix use-after-free in gfs2_qd_dealloc gfs2_qd_dealloc(), called as an RCU callback from gfs2_qd_dispose(), accesses the superblock object sdp through qd->qd_sbd after freeing qd. It does so to decrement s

mednvdPublished 2026-07-19

CVE-2026-63804 CVSS: 7.8 HIGH Published: 2026-07-19T12:16:53.120

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

gfs2: fix use-after-free in gfs2_qd_dealloc

gfs2_qd_dealloc(), called as an RCU callback from gfs2_qd_dispose(), accesses the superblock object sdp through qd->qd_sbd after freeing qd. It does so to decrement sd_quota_count and wake up sd_kill_wait.

However, by t

Indicators of compromise

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-63804