ipv6: fib6_rules: avoid possible NULL dereference in fib6_rule_action()
In the Linux kernel, the following vulnerability has been resolved: ipv6: fib6_rules: avoid possible NULL dereference in fib6_rule_action() syzbot is able to trigger the following crash [1], caused by unsafe ip6_dst_idev() use. Indeed ip6_dst_idev() can return NULL, and must always be checked. [1] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 31648 Comm: syz-executor.0 Not tainted 6.9.0-rc4-next-20240417-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:__fib6_rule_action net/ipv6/fib6_rules.c:237 [inline] RIP: 0010:fib6_rule_action+0x241/0x7b0 net/ipv6/fib6_rules.c:267 Code: 02 00 00 49 8d 9f d8 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 f9 32 bf f7 48 8b 1b 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 e0 32 bf f7 4c 8b 03 48 89 ef 4c RSP: 0018:ffffc9000fc1f2f0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1a772f98c8186700 RDX: 0000000000000003 RSI: ffffffff8bcac4e0 RDI: ffffffff8c1f9760 RBP: ffff8880673fb980 R08: ffffffff8fac15ef R09: 1ffffffff1f582bd R10: dffffc0000000000 R11: fffffbfff1f582be R12: dffffc0000000000 R13: 0000000000000080 R14: ffff888076509000 R15: ffff88807a029a00 FS: 00007f55e82ca6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2:
CVE-2024-36902
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-2024-36902
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": "5e5f3f0f801321078c897a5de0b4b4304f234da0",
"lessThan": "4a5a573387da6a6b23a4cc62147453ff1bc32afa",
"versionType": "git"
},
{
"status": "affected",
"version": "5e5f3f0f801321078c897a5de0b4b4304f234da0",
"lessThan": "ddec23f206a944c73bcc2724358b85388837daff",
"versionType": "git"
},
{
"status": "affected",
"version": "5e5f3f0f801321078c897a5de0b4b4304f234da0",
"lessThan": "674c951ab8a23f7aff9b4c3f2f865901bc76a290",
"versionType": "git"
},
{
"status": "affected",
"version": "5e5f3f0f801321078c897a5de0b4b4304f234da0",
"lessThan": "35297fc68de36826087e976f86a5b1f94fd0bf95",
"versionType": "git"
},
{
"status": "affected",
"version": "5e5f3f0f801321078c897a5de0b4b4304f234da0",
"lessThan": "7e3242c139c38e60844638e394c2877b16b396b0",
"versionType": "git"
},
{
"status": "affected",
"version": "5e5f3f0f801321078c897a5de0b4b4304f234da0",
"lessThan": "8745a8d74ba17dafe72b6ab461fa6c007d879747",
"versionType": "git"
},
{
"status": "affected",
"version": "5e5f3f0f801321078c897a5de0b4b4304f234da0",
"lessThan": "1876881c9a49613b5249fb400cbf53412d90cb09",
"versionType": "git"
},
{
"status": "affected",
"version": "5e5f3f0f801321078c897a5de0b4b4304f234da0",
"lessThan": "d101291b2681e5ab938554e3e323f7a7ee33e3aa",
"versionType": "git"
}
],
"programFiles": [
"net/ipv6/fib6_rules.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.26"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.26",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.19.314",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.276",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.217",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.159",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.91",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.31",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.8.10",
"versionType": "semver",
"lessThanOrEqual": "6.8.*"
},
{
"status": "unaffected",
"version": "6.9",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv6/fib6_rules.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-36902
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26586 · Revision 1
- Added to Heist Feed
- Publisher date