cbcvebase.
CVE-2026-64047
published 2026-07-19

CVE-2026-64047: In the Linux kernel, the following vulnerability has been resolved: net: tls: fix off-by-one in sg_chain entry count for wrapped sk_msg ring When an sk_msg…

PriorityP349critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.51%
42.2th percentile
In the Linux kernel, the following vulnerability has been resolved: net: tls: fix off-by-one in sg_chain entry count for wrapped sk_msg ring When an sk_msg scatterlist ring wraps (sg.end sg.data[msg_pl->sg.start], MAX_SKB_FRAGS - msg_pl->sg.start + 1, msg_pl->sg.data); This places the chain pointer at sg_chain(data[start], (MAX_SKB_FRAGS - msg_start + 1) .. = &data[start] + (MAX_SKB_FRAGS - msg_start + 1) - 1 = data[start + (MAX_SKB_FRAGS - start + 1) - 1] = data[MAX_SKB_FRAGS] instead of the true last entry. This is likely due to a "race" of the commit under Fixes landing close to commit 031097d9e079 ("bpf: sk_msg, zap ingress queue on psock down") Convert to ARRAY_SIZE and drop the data[start] / - start (as suggested by Sabrina).

Affected

70 ranges· showing 25
VendorProductVersion rangeFixed in
linuxlinux——
linuxlinux——
linuxlinux>= 5.4.14 < 5.55.5
linuxlinux>= 9aaaa56845a06aeabdd597cbe19492dc01f281ec < 73963a375885d5ccb7def39fd0b4f542e0f343dd73963a375885d5ccb7def39fd0b4f542e0f343dd
linuxlinux>= 9aaaa56845a06aeabdd597cbe19492dc01f281ec < 47110c3a9ac247b688657337f5981efcfcb240dc47110c3a9ac247b688657337f5981efcfcb240dc
linuxlinux>= 9aaaa56845a06aeabdd597cbe19492dc01f281ec < 84158c2997159df4a0d70cd9c46774512d32a52284158c2997159df4a0d70cd9c46774512d32a522
linuxlinux>= 9aaaa56845a06aeabdd597cbe19492dc01f281ec < 131ef12057d92b77b636321b7849c69222405a97131ef12057d92b77b636321b7849c69222405a97
linuxlinux>= 9aaaa56845a06aeabdd597cbe19492dc01f281ec < 66339b71f105e6f83e0da3b9583d95077534fe1d66339b71f105e6f83e0da3b9583d95077534fe1d
linuxlinux>= 9aaaa56845a06aeabdd597cbe19492dc01f281ec < eca989eab4b2599dcb02f72140a7c08f08838520eca989eab4b2599dcb02f72140a7c08f08838520
linuxlinux>= 9aaaa56845a06aeabdd597cbe19492dc01f281ec < 2fb0dc7e0099686c4e9d2732745d8a31b18c36282fb0dc7e0099686c4e9d2732745d8a31b18c3628
linuxlinux>= 9aaaa56845a06aeabdd597cbe19492dc01f281ec < 285943c6e7ca309bbea84b253745154241d9788a285943c6e7ca309bbea84b253745154241d9788a
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel>= 5.11 < 5.15.2095.15.209
linuxlinux_kernel>= 5.16 < 6.1.1756.1.175
linuxlinux_kernel>= 5.4.14 < 5.55.5
linuxlinux_kernel>= 5.5.1 < 5.10.2585.10.258
linuxlinux_kernel>= 6.13 < 6.18.346.18.34
linuxlinux_kernel>= 6.19 < 7.0.117.0.11
linuxlinux_kernel>= 6.2 < 6.6.1426.6.142
linuxlinux_kernel>= 6.7 < 6.12.926.12.92

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat9.8CRITICAL
vendor_ubuntu9.1CRITICAL
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