tcp: Don't call skb_clone_and_charge_r() for close()d listener in tcp_v6_do_rcv().
In the Linux kernel, the following vulnerability has been resolved: tcp: Don't call skb_clone_and_charge_r() for close()d listener in tcp_v6_do_rcv(). tcp_v6_do_rcv() no longer calls skb_clone_and_charge_r() for TCP_LISTEN since commit 073d89808c06 ("net: fix data-races around sk->sk_forward_alloc"). However, there is still a small race window between tcp_v6_rcv() and tcp_v6_do_rcv(), where concurrent close() changes TCP_LISTEN to TCP_CLOSE, causing skb_clone_and_charge_r() to be called locklessly and resulting in the splat below. [0] Let's avoid calling skb_clone_and_charge_r() for TCP_CLOSE as well. This is fine for non-listeners because tcp_rcv_state_process() drops skb for TCP_CLOSE and opt_skb was freed immediately anyway. [0]: sk->sk_forward_alloc WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x64d/0x810 net/ipv4/af_inet.c:162, CPU#1: ksoftirqd/1/28 Modules linked in: CPU: 1 UID: 0 PID: 28 Comm: ksoftirqd/1 Not tainted 7.2.0 #17 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-debian-1.17.0-1 04/01/2014 RIP: 0010:inet_sock_destruct+0x64d/0x810 net/ipv4/af_inet.c:162 Code: 3d 49 ff e9 06 fd ff ff e8 d0 5b 83 f8 90 0f 0b 90 e9 35 fe ff ff e8 c2 5b 83 f8 90 0f 0b 90 e9 c5 fe ff ff e8 b4 5b 83 f8 90 <0f> 0b 90 e9 04 ff ff ff e8 a6 5b 83 f8 90 0f 0b 90 e9 65 fe ff ff RSP: 0018:ffffc90000677bb8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880117bde80 RCX: ffffffff8957eb41 RDX: ffff88801dad5d00 RSI: ffffffff8957ec3c RDI: 000000000000000
CVE-2026-98300
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98300
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714",
"lessThan": "a23a3bc5004df6434de05797e0b6b2ecf864b86a",
"versionType": "git"
},
{
"status": "affected",
"version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714",
"lessThan": "1cb7f292a337fdc72a8219bcd9d40a9cf5e86db5",
"versionType": "git"
},
{
"status": "affected",
"version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714",
"lessThan": "7d94602e77a4525611afebb23149145ac242afd7",
"versionType": "git"
},
{
"status": "affected",
"version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714",
"lessThan": "b727e3d58cb906f1506c1334dfba71fbb1338339",
"versionType": "git"
},
{
"status": "affected",
"version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714",
"lessThan": "3e3394a13b603cc79b6a35480b8e20df6c716944",
"versionType": "git"
},
{
"status": "affected",
"version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714",
"lessThan": "619bfbaacbff6a9822923f69f6af29d7f66a870c",
"versionType": "git"
},
{
"status": "affected",
"version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714",
"lessThan": "56d38839ef0bff6526d9bd73b6811bd00316b21c",
"versionType": "git"
},
{
"status": "affected",
"version": "e994b2f0fb9229aeff5eea9541320bd7b2ca8714",
"lessThan": "8e759cd1f6444a946bd1fd2b2b29eea582eea1d5",
"versionType": "git"
}
],
"programFiles": [
"net/ipv6/tcp_ipv6.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv6/tcp_ipv6.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98300
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38377 · Revision 1
- Added to Heist Feed
- Publisher date