5.5

CVE-2025-38018

net/tls: fix kernel panic when alloc_page failed

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

net/tls: fix kernel panic when alloc_page failed

We cannot set frag_list to NULL pointer when alloc_page failed.
It will be used in tls_strp_check_queue_ok when the next time
tls_strp_read_sock is called.

This is because we don't reset full_len in tls_strp_flush_anchor_copy()
so the recv path will try to continue handling the partial record
on the next call but we dettached the rcvq from the frag list.
Alternative fix would be to reset full_len.

Unable to handle kernel NULL pointer dereference
at virtual address 0000000000000028
 Call trace:
 tls_strp_check_rcv+0x128/0x27c
 tls_strp_data_ready+0x34/0x44
 tls_data_ready+0x3c/0x1f0
 tcp_data_ready+0x9c/0xe4
 tcp_data_queue+0xf6c/0x12d0
 tcp_rcv_established+0x52c/0x798
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.0 < 6.1.140
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.92
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.30
Linux ≫ Linux Kernel Version >= 6.13 < 6.14.8
Linux ≫ Linux Kernel Version6.15 Updaterc1
Linux ≫ Linux Kernel Version6.15 Updaterc2
Linux ≫ Linux Kernel Version6.15 Updaterc3
Linux ≫ Linux Kernel Version6.15 Updaterc4
Linux ≫ Linux Kernel Version6.15 Updaterc5
Linux ≫ Linux Kernel Version6.15 Updaterc6
Debian ≫ Debian Linux Version11.0
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.055
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/8f7f96549bc55e4ef3a6b499bc5011e5de2f46c4
Patch
https://git.kernel.org/stable/c/406d05da26835943568e61bb751c569efae071d4
Patch
https://git.kernel.org/stable/c/a11b8c0be6acd0505a58ff40d474bd778b25b93a
Patch
https://git.kernel.org/stable/c/5f1f833cb388592bb46104463a1ec1b7c41975b6
Patch
https://git.kernel.org/stable/c/491deb9b8c4ad12fe51d554a69b8165b9ef9429f
Patch
https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html
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