121 lines
5.6 KiB
JSON
121 lines
5.6 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-31437",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-03-09T15:48:24.090Z",
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"datePublished": "2026-04-22T13:53:36.361Z",
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"dateUpdated": "2026-05-11T22:08:41.432Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-11T22:08:41.432Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix NULL pointer dereference in netfs_unbuffered_write() on retry\n\nWhen a write subrequest is marked NETFS_SREQ_NEED_RETRY, the retry path\nin netfs_unbuffered_write() unconditionally calls stream->prepare_write()\nwithout checking if it is NULL.\n\nFilesystems such as 9P do not set the prepare_write operation, so\nstream->prepare_write remains NULL. When get_user_pages() fails with\n-EFAULT and the subrequest is flagged for retry, this results in a NULL\npointer dereference at fs/netfs/direct_write.c:189.\n\nFix this by mirroring the pattern already used in write_retry.c: if\nstream->prepare_write is NULL, skip renegotiation and directly reissue\nthe subrequest via netfs_reissue_write(), which handles iterator reset,\nIN_PROGRESS flag, stats update and reissue internally."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/netfs/direct_write.c"
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],
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"versions": [
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{
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"version": "72d08d2839649d1c5efbe375751f4473fa4486af",
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"lessThan": "a4d1b4ba9754bac3efebd06f583a44a7af52c0ab",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0c29f6d63122a0168d67cb8ecde5b4cf7fe4acb0",
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"lessThan": "7a5482f5ce891decbf36f2e6fab1e9fc4a76a684",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a0b4c7a49137ed21279f354eb59f49ddae8dffc2",
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"lessThan": "e9075e420a1eb3b52c60f3b95893a55e77419ce8",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/netfs/direct_write.c"
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],
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"versions": [
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{
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"version": "6.18.17",
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"lessThan": "6.18.21",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.19.7",
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"lessThan": "6.19.11",
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"status": "affected",
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"versionType": "semver"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.18.17",
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"versionEndExcluding": "6.18.21"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.19.7",
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"versionEndExcluding": "6.19.11"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/a4d1b4ba9754bac3efebd06f583a44a7af52c0ab"
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},
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{
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"url": "https://git.kernel.org/stable/c/7a5482f5ce891decbf36f2e6fab1e9fc4a76a684"
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},
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{
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"url": "https://git.kernel.org/stable/c/e9075e420a1eb3b52c60f3b95893a55e77419ce8"
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}
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],
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"title": "netfs: Fix NULL pointer dereference in netfs_unbuffered_write() on retry",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |