CVE-2025-38018: debian debian_linux NULL Pointer Dereference
Vulnerability summary
CVE-2025-38018 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 39.5% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 31 · Related 30Timeline
- 18-06-2025PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
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
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
0.47%
Chance of exploitation in the next 30 days
Percentile
40%
Versus all other CVEs
30-day change
0.00 pp
From 0.47% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu118 products
- linux< 6.8.0-100.100
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.8.0-1046.49
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.140-1 | < 6.12.30-1
- debian_linuxEOL11.0
Linux2 products
- linux≥ 84c61fe1a75b4255df1e1e7c054c9e6d048da417, < 8f7f96549bc55e4ef3a6b499bc5011e5de2f46c4 | ≥ 84c61fe1a75b4255df1e1e7c054c9e6d048da417, < 406d05da26835943568e61bb751c569efae071d4 | ≥ 84c61fe1a75b4255df1e1e7c054c9e6d048da417, < a11b8c0be6acd0505a58ff40d474bd778b25b93a | ≥ 84c61fe1a75b4255df1e1e7c054c9e6d048da417, < 5f1f833cb388592bb46104463a1ec1b7c41975b6 | ≥ 84c61fe1a75b4255df1e1e7c054c9e6d048da417, < 491deb9b8c4ad12fe51d554a69b8165b9ef9429f | 6.0
- linux_kernel≥ 6.0, < 6.1.140 | ≥ 6.2, < 6.6.92 | ≥ 6.7, < 6.12.30 | ≥ 6.13, < 6.14.8 | 6.15:rc1 | 6.15:rc2 | 6.15:rc3 | 6.15:rc4 | 6.15:rc5 | 6.15:rc6
3 vendors · 122 products
References
29 links
lists.debian.org/debian-lts-announce/2025/08/msg00010.htmlThird Party Advisory