8.4

CVE-2026-72426

bpf: Preserve pointer spill metadata during half-slot cleanup

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

bpf: Preserve pointer spill metadata during half-slot cleanup

__clean_func_state() cleans dead stack slots in 4-byte halves. When the
high half of a STACK_SPILL slot is dead and the low half remains live,
cleanup converts the live low half to STACK_MISC or STACK_ZERO and clears
the saved spilled_ptr metadata.

That conversion is safe only for scalar spills. For a pointer spill, this
metadata clear lets a later 32-bit fill from the still-live half avoid the
normal non-scalar register-fill check and be treated as an ordinary scalar
stack read.

Leave non-scalar spill slots intact in this half-live shape. This is
conservative for pruning and preserves the existing
check_stack_read_fixed_off() rejection path for partial fills from pointer
spills.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version be23266b4a08540aa43d8503a2ea10247c8daebe
Version < 0f9278b22cda6fd2525049930157b79b4036b4ef
Status affected
Version be23266b4a08540aa43d8503a2ea10247c8daebe
Version < 3a354149bceacadbcf7d7b4766f5ef26a85892ab
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 7.1
Status affected
Version 0
Version < 7.1
Status unaffected
Version <= 7.1.*
Version 7.1.5
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.18% 0.078
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 8.4 2.5 5.9
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/0f9278b22cda6fd2525049930157b79b4036b4ef
https://git.kernel.org/stable/c/3a354149bceacadbcf7d7b4766f5ef26a85892ab